166-527: The Monsoon of South Asia is among several geographically distributed global monsoons . It affects the Indian subcontinent , where it is one of the oldest and most anticipated weather phenomena and an economically important pattern every year from June through September, but it is only partly understood and notoriously difficult to predict. Several theories have been proposed to explain the origin, process, strength, variability, distribution, and general vagaries of
332-610: A commissioner of police . The Thiruvananthapuram city police is a division of the Kerala Police , and the administrative control lies with the Kerala Home Ministry . Thiruvananthapuram city police is the largest police division in Kerala, and it consists of four subdivisional offices and 24 police stations and a sanctioned strength of 3,500 police personnel. The Central Prison is the oldest prison in Kerala and
498-546: A close relationship with Tamil heritage. In the early 18th century CE, the Travancore royal family adopted some members from the royal family of Kolathunadu based at Kannur . Then, Marthanda Varma who inherited the Kingdom of Venad expanded the kingdom by conquering the kingdoms of Attingal, Kollam, Kayamkulam, Kottarakara, Kottayam, Changanassery, Meenachil, Poonjar and Ambalapuzha. In 1729, Marthanda Varma founded
664-614: A concentrated belt that stretches east–west except in East China where it is tilted east-northeast over Korea and Japan. The seasonal rain is known as Meiyu in China, Jangma in Korea, and Bai-u in Japan, with the latter two resembling frontal rain. The onset of the summer monsoon is marked by a period of premonsoonal rain over South China and Taiwan in early May. From May through August,
830-481: A consistent, detailed definition. Some examples are: The first people to observe the combined pattern of the monsoons' branches over different regions of South Asia were sailors in the Arabian Sea who traveled between Africa, India, and Southeast Asia. The monsoon can be categorized into two branches based on their spread over the subcontinent: Alternatively, it can be categorized into two segments based on
996-430: A cultural center. Marthanda Varma gave patronage to different temple art forms including Koothu , Padhakam , Kathakali , Thullal , and Koodiyattam . Noted artists such as Ramapurathu Warrier and Kunchan Nambiar amongst others served as his court poets. Travancore became the most dominant state in Kerala by defeating the powerful Zamorin of Kozhikode in the battle of Purakkad in 1755. The city developed into
1162-410: A dominant westerly component and a strong tendency to ascend and produce copious amounts of rain (because of the condensation of water vapor in the rising air). The intensity and duration, however, are not uniform from year to year. Winter monsoons, by contrast, have a dominant easterly component and a strong tendency to diverge, subside and cause drought. Similar rainfall is caused when moist ocean air
1328-622: A few sub-systems, such as the Indian Subcontinental Monsoon which affects the Indian subcontinent and surrounding regions including Nepal, and the East Asian Monsoon which affects southern China, Taiwan , Korea and parts of Japan. The southwestern summer monsoons occur from June through September. The Thar Desert and adjoining areas of the northern and central Indian subcontinent heat up considerably during
1494-402: A long period. A normal monsoon is generally accepted to be one involving close to the average quantity of precipitation over all the geographical locations under its influence ( mean spatial distribution ) and over the entire expected time period ( mean temporal distribution ). Additionally, the arrival date and the departure date of both the southwest and northeast monsoon should be close to
1660-547: A low pressure system known as a monsoon trough develops over South-East Asia and Australasia and winds are directed toward Australia. In the Philippines, northeast monsoon is called Amihan . The East Asian monsoon affects large parts of Indochina , the Philippines , China, Taiwan , Korea, Japan, and Siberia . It is characterised by a warm, rainy summer monsoon and a cold, dry winter monsoon. The rain occurs in
1826-506: A moderately earthquake-prone urban centre and categorised the metropolis in the Seismic III Zone. Thiruvananthapuram lies on the shores of Karamana and Killi rivers . Vellayani , Thiruvallam and Aakulam backwaters lie in the city. The soil type in the middle part of the city is a dark brown loamy laterite soil high in phosphates. Laterisation is a result of the heavy rainfall and humid conditions. In western coastal regions of
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#17327652216411992-464: A more even temperature, while land temperatures are more variable. During warmer months sunlight heats the surfaces of both land and oceans, but land temperatures rise more quickly. As the land's surface becomes warmer, the air above it expands and an area of low pressure develops. Meanwhile, the ocean remains at a lower temperature than the land, and the air above it retains a higher pressure. This difference in pressure causes sea breezes to blow from
2158-675: A seasonally changing pattern, although technically there is also a dry phase. The term is also sometimes used to describe locally heavy but short-term rains. The major monsoon systems of the world consist of the West African , Asian– Australian , the North American , and South American monsoons. The term was first used in English in British India and neighboring countries to refer to the big seasonal winds blowing from
2324-721: A significant intellectual and artistic centre during this period. The city's golden age was during the mid-19th century under the reign of Maharaja Swathi Thirunal and Maharaja Ayilyam Thirunal . This era saw the establishment of the first English school (1834), the Observatory (1837), the General Hospital (1839), the Oriental Research Institute & Manuscripts Library and the University College (1873). The first mental hospital in
2490-401: A strong southwest monsoon over central India, and a weak jet results in a weak monsoon. El Niño is a warm ocean current originating along the coast of Peru that replaces the usual cold Humboldt Current . The warm surface water moving toward the coast of Peru with El Niño is pushed west by the trade winds, thereby raising the temperature of the southern Pacific Ocean. The reverse condition
2656-590: A timing of the monsoon beginning 15–20 million years ago and linked to early Tibetan uplift. Testing of this hypothesis awaits deep ocean sampling by the Integrated Ocean Drilling Program . The monsoon has varied significantly in strength since this time, largely linked to global climate change , especially the cycle of the Pleistocene ice ages. A study of Asian monsoonal climate cycles from 123,200 to 121,210 years BP, during
2822-646: A weakening of the Leeuwin Current (LC). The weakening of the LC would have an effect on the sea surface temperature (SST) field in the Indian Ocean, as the Indonesian Throughflow generally warms the Indian Ocean. Thus these five intervals could probably be those of considerable lowering of SST in the Indian Ocean and would have influenced Indian monsoon intensity. During the weak LC, there
2988-438: Is 34 °C (93 °F) and the mean minimum temperature is 21 °C (70 °F). The humidity is high and rises to about 90% during the monsoon season. Thiruvananthapuram is the first city along the path of the south-west monsoons and gets its first showers in early June. The city receives heavy rainfall of around 1,835 mm (72.2 in) per year. The city also gets rain from the receding north-east monsoons which hit
3154-740: Is India's first Infotainment industrial park. Being India's largest city in the deep south, it is strategically prominent and hosts the Southern Air Command headquarters of the Indian Air Force , the Thumba Equatorial Rocket Launching Station and the upcoming Vizhinjam International Seaport . Thiruvananthapuram is a major tourist centre, known for the Padmanabhaswamy Temple , the beaches of Kovalam and Varkala ,
3320-507: Is a Public-private partnership project to improve and maintain the existing road network in the city to cater to the needs of rapid urbanisation. TRCIP has won the International Road Federation's Global Road Achievement Awards in 2015. TCRIP has also been selected by United Nations as a replicable Public Private Partnership model. It was one of the 12 Public-private partnership project case studies from across
3486-416: Is a transhipment port under construction. Vizhinjam port's location is close to the international shipping routes and, it is just 10–12 nautical miles from the busy Persian Gulf - Malacca shipping lane. The port also has a natural depth of 18 to 20 metres which can accommodate huge container ships . The berths at Vizhinjam port are designed to cater to vessels of up to 24,000 TEU . Thiruvananthapuram
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#17327652216413652-487: Is a major IT and ITES hub in India. The city contributes about 40-45% of Kerala's total software exports. Thiruvananthapuram houses major multinational Technology companies like Oracle Corporation , Nissan , Allianz Technology , Envestnet , Tata Consultancy Services , Infosys , UST Global , Ernst & Young , Flytxt, Navigant , Tata Elxsi , McKinsey & Company , RR Donnelly and Quest Global. Technopark
3818-428: Is a major tourist hub in India. Kovalam and Varkala are popular beach towns near the city. Other important beaches include Poovar , Shankumugham Beach , Azhimala Beach, Vizhinjam Beach and Veli Beach. Other places of interest include Agasthyamala rain forests, Neyyar Wildlife Sanctuary , Kallar , Braemore, Ponmudi hills, Poovar , Anchuthengu backwaters, Varkala Cliffs and Kappil - Edava lakes. The city
3984-454: Is a significant economic sector. The presence of natural attractions like beaches, backwaters, hills, and plantations and attractions like heritage, history, Ayurveda , medical tourism and knowledge centres attract many tourists. The city experienced a surge of investment in the real estate, infrastructure and retail sectors in 2016–17. Port-related activity is low mainly due to the underdevelopment of ports. Vizhinjam International Seaport
4150-546: Is also found in Padmanabhaswamy temple, which makes it distinct and unique from the architectural style of temples in northern and central parts of Kerala . The official language of Kerala , based at Kollam , was also identified as Tamil , by the natives of Kerala in those times. and the Chola dynasty , The place names, the dialects of Malayalam spoken, and the customs that exist in Kerala today still reveal
4316-525: Is also known for its unique style of architecture involving Kerala Architecture with British and Dravidian influences. Napier museum , Thiruvanathapuram Zoo , Padmanabha Swamy temple , Kuthira Malika palace , Kilimanoor palace and The Thiruvananthapuram Golf Club heritage building are examples of this. The main museums include Kerala Science and Technology Museum (with its attached Priyadarsini Planetarium ), Napier Museum , Kerala Soil Museum and Koyikkal Palace Museum . Agasthyamala Biosphere Reserve
4482-761: Is an officer appointed by the government , who serves as the administrative head of the TMC and implements the council's decisions based on the resolutions adopted by the council. The functions of the Municipal Corporation are managed by seven departments—engineering, health, general administration, council, accounts and revenue. For the decentralised role of TMC, eleven Zonal Offices are created. The zonal offices are in Fort, Kadakampally, Nemom , Ulloor , Attipra, Thiruvallom, Kazhakkuttom , Sreekaryam , Kudappanakunnu , Vattiyoorkavu and Vizhinjam . The functions of
4648-598: Is built on seven hills by the seashore and is at 8°30′N 76°54′E / 8.5°N 76.9°E / 8.5; 76.9 on the west coast, near the southern tip of mainland India. The city is on the west coast of India and is bounded by the Laccadive Sea to its west and the Western Ghats to its east. The average elevation of the city is 16 ft (4.9 m) above sea level. The Geological Survey of India has identified Thiruvananthapuram as
4814-631: Is developed to ease congestion on the central station and it acts as a satellite station to Thiruvananthapuram Central. Thiruvananthapuram Central is the busiest railway station in Kerala. Other railway stations in the city are Thiruvananthapuram Pettah , Nemom railway station , Veli railway station and Kazhakoottam railway station . Being the southernmost municipal corporation in India, many long train services of Indian Railways originate from Thiruvananthapuram like Trivandrum Rajdhani Express, Thiruvananthapuram - Silchar Superfast Express and Kochuveli - Amritsar Weekly Express . There are plans to develop
4980-666: Is directly of "cyclonic" (i.e., monsoon-driven) origin (as opposed to " local convection "). The effects also extend westwards to the Mediterranean, where however the impact of the monsoon is to induce drought via the Rodwell-Hoskins mechanism . Around September, with the sun retreating south, the northern landmass of the Indian subcontinent begins to cool off rapidly, and air pressure begins to build over northern India. The Indian Ocean and its surrounding atmosphere still hold their heat, causing cold wind to sweep down from
5146-589: Is essential for both military logistics and civil aviation in the southern part of the country. Thiruvananthapuram is the headquarters of the Southern Air Command (SAC) of the Indian Air Force. The city has a climate that lies on the border between a tropical savanna climate ( Köppen Aw ) and a tropical monsoon climate ( Am ). As a result, its only distinct seasons relate to rainfall rather than temperature. The mean maximum temperature
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5312-663: Is further aided by state institutions such as the State Central Library , one of the oldest public libraries in India, which was established in 1829, and other major libraries including the Thiruvananthapuram Corporation Central library, and the Kerala University Library . Thiruvananthapuram has been a hub of classical music since the days of Maharaja of Travancore , Swathi Thirunal . Thiruvananthapuram
5478-567: Is known as La Niña . Southern Oscillation , a phenomenon first observed by Sir Gilbert Walker , director general of observatories in India, refers to the seesaw relationship of atmospheric pressures between Tahiti and Darwin , Australia. Walker noticed that when pressure was high in Tahiti, it was low in Darwin, and vice versa . A Southern Oscillation Index (SOI), based on the pressure difference between Tahiti and Darwin, has been formulated by
5644-700: Is known for many music festivals like the Navarathri Music Festival, one of the oldest festivals of its kind in South India, Swathi Sangeethotsavam , Soorya Music fest, Neelakanta Sivan Music Fest and many other music festivals are organised by various cultural groups. The 111-day-long Soorya Festival is the biggest art and cultural event in Kerala . The Soorya Festival features film festivals, theatre festivals, dance, music, painting and photography exhibitions. The Malayalam film Industry
5810-533: Is lifted upwards by mountains, surface heating, convergence at the surface, divergence aloft, or from storm-produced outflows at the surface. However the lifting occurs, the air cools due to expansion in lower pressure, and this produces condensation . The monsoon of western Sub-Saharan Africa is the result of the seasonal shifts of the Intertropical Convergence Zone and the great seasonal temperature and humidity differences between
5976-607: Is listed in UNESCO 's World Network of Biosphere Reserves . Thiruvananthapuram is known as the "Evergreen City of India" because of its green landscapes and the presence of many public parks. Thiruvananthapuram has historically been a cultural hub in Southern India due to the development of arts, architecture and liberal customs by the rulers of erstwhile Thiruvananthapuram. As a testimony to this, renowned artists like Maharaja Swathi Thirunal and Raja Ravi Varma hail from
6142-560: Is now a region in the present-day Thiruvananthapuram, was the capital of the Ay dynasty. Vizhinjam was an important port city from as early as the second century BC. During the Ay dynasty's rule, Thiruvananthapuram witnessed many battles in which the Chola and Pandyan dynasties attempted to capture the port town. After the death of king Vikramaditya Varaguna in 925 AD, the glory of the Ays departed and almost all their territories became part of
6308-551: Is one of Asia's largest film festivals in terms of viewer participation. In addition to various film festivals, the presence of the Central Board of Film Certification 's regional office, many movie studios and production facilities like the Uma Studio, Chitranjali Studio , Merryland Studio , Kinfra Film and Video Park and Vismayas Max contribute to the growth of Thiruvananthapuram as a centre of cinema. Apart from
6474-426: Is still largely rain-fed . A recent assessment of the monsoonal changes indicate that the land warming has increased during 2002–2014, possibly reviving the strength of the monsoon circulation and rainfall. Future changes in the monsoon will depend on a competition between land and ocean—on which is warming faster than the other. Meanwhile, there has been a three-fold rise in widespread extreme rainfall events during
6640-545: Is the capital city of the Indian state of Kerala . It is the largest and most populous city in Kerala and it is also a major port city. Thiruvananthapuram is where Asia's first space university, the Indian Institute of Space Science and Technology located, and India's first IT park, Technopark Trivandrum is in Thiruvananthapuram. The city also includes India’s first deep-water trans-shipment port,
6806-418: Is the fastest-growing district in Kerala. Thiruvananthapuram was listed as one of the top ten cities in India on Vibrancy and Consumption Index by a study conducted by global financial services firm Morgan Stanley . State- and central-government employees make up a large percentage of the city's workforce. Thiruvananthapuram is a major aerospace research centre in India. The Vikram Sarabhai Space Centre ,
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6972-478: Is the largest information-technology park in India in terms of built-up area. It is the largest employment base campus in Kerala with 52,000 IT/ITES professionals and about 400 companies. Other IT, media and industrial campuses include Kinfra Film and Video Park , Kinfra Apparel Park, B-HUB and Chithranjali Film Complex . Other major IT, biotechnology and industrial campuses include Technocity , Bio 360 Life sciences park and Digital Science Park . Tourism
7138-593: Is the possibility of reduced intensity of the Indian winter monsoon and strong summer monsoon, because of change in the Indian Ocean dipole due to reduction in net heat input to the Indian Ocean through the Indonesian Throughflow. Thus a better understanding of the possible links between El Niño , Western Pacific Warm Pool, Indonesian Throughflow, wind pattern off western Australia, and ice volume expansion and contraction can be obtained by studying
7304-410: Is traditionally a seasonal reversing wind accompanied by corresponding changes in precipitation but is now used to describe seasonal changes in atmospheric circulation and precipitation associated with annual latitudinal oscillation of the Intertropical Convergence Zone (ITCZ) between its limits to the north and south of the equator. Usually, the term monsoon is used to refer to the rainy phase of
7470-470: The Ay dynasty during ancient and medieval ages, which was a Tamil kingdom based in the southernmost part of the Indian subcontinent. Ay kingdom had experienced attacks and conquests by Cholas and Pandyas in various periods. Later it became a part of Venad in late Middle Ages, which was eventually expanded as the powerful kingdom of Travancore in 18th century CE. The Tamil -Dravidian kind of architecture
7636-581: The Bay of Bengal and Arabian Sea in the southwest bringing heavy rainfall to the area. The etymology of the word monsoon is not wholly certain. The English monsoon came from Portuguese monção ultimately from Arabic موسم ( mawsim , "season"), "perhaps partly via early modern Dutch monson ". Strengthening of the Asian monsoon has been linked to the uplift of the Tibetan Plateau after
7802-726: The Border Security Force (BSF) are also present. Thiruvananthapuram also houses a large army cantonment in Pangode which houses some regiments of the Indian Army . In the city there is a Consulate of the United Arab Emirates , a Consulate of the Maldives , and Honorary Consulates of Sri Lanka , Russia and Germany . The Kerala Water Authority supplies the city with water that is sourced from
7968-510: The Bureau of Meteorology (Australia) to measure the strength of the oscillation. Walker noticed that the quantity of rainfall in the Indian subcontinent was often negligible in years of high pressure over Darwin (and low pressure over Tahiti). Conversely, low pressure over Darwin bodes well for precipitation quantity in India. Thus, Walker established the relationship between southern oscillation and quantities of monsoon rains in India. Ultimately,
8134-684: The Chera dynasty . During the tenth century, the Cholas attacked and sacked Vizhinjam and surrounding regions. The port in Vizhinjam and the historic education center of Kanthalloor Sala were also destroyed by Cholas during this period. A branch of the Ay family, which had controlled the Padmanabhaswamy Temple , merged with the Kingdom of Venad in the 12th century. Present-day Thiruvananthapuram city, district, and Kanyakumari district , were parts of
8300-622: The Eemian interglacial, suggests that they had an average duration of around 64 years, with the minimum duration being around 50 years and the maximum approximately 80 years, similar to today. A study of marine plankton suggested that the South Asian Monsoon (SAM) strengthened around 5 million years ago. Then, during ice periods, the sea level fell and the Indonesian Seaway closed. When this happened, cold waters in
8466-756: The Hadley circulation during boreal winter. It is associated with the development of the Siberian High and the movement of the heating maxima from the Northern Hemisphere to the Southern Hemisphere. North-easterly winds flow down Southeast Asia, are turned north-westerly/westerly by Borneo topography towards Australia. This forms a cyclonic circulation vortex over Borneo, which together with descending cold surges of winter air from higher latitudes, cause significant weather phenomena in
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#17327652216418632-575: The Himalayas and Indo-Gangetic Plain towards the vast spans of the Indian Ocean south of the Deccan peninsula. This is known as the Northeast Monsoon or Retreating Monsoon. While travelling towards the Indian Ocean, the cold dry wind picks up some moisture from the Bay of Bengal and pours it over peninsular India and parts of Sri Lanka . Cities like Chennai , which get less rain from
8798-544: The Indian Institute of Space Science and Technology , National Centre for Earth Science Studies and a campus of the Indian Institutes of Science Education and Research . The city is home to media institutions like Toonz Animation India and Tata Elxsi Ltd , and also to Chitranjali Film Studio , one of the first film studios in Malayalam Cinema , and Kinfra Film and Video Park at Kazhakoottom, which
8964-607: The Karamana River ; most of it is drawn from the Aruvikkara and Peppara reservoirs, and it is treated and purified at the Aruvikkara pumping stations. The Wellington Water Works, commissioned in 1933, is one of the oldest city water supply schemes in India. The sewage water is treated at Muttathara sewage-treatment plant, which handles 32 million litres per day. The city area is divided into seven blocks for
9130-642: The Kerala Legislative Assembly and the state secretariat, which is housed in the Kerala Government Secretariat complex . Thiruvananthapuram has two parliamentary constituencies— Attingal and Thiruvananthapuram —and elects five Members of the Legislative Assembly ( MLAs ) to the state legislature. The Thiruvananthapuram City Police is the main law-enforcement agency in the city. It is headed by
9296-547: The Rajpramukh of the Travancore-Cochin Union from 1 July 1949 until 31 October 1956. When the state of Kerala was formed on 1 November 1956, Thiruvananthapuram became its capital. With the establishment of Thumba Equatorial Rocket Launching Station (TERLS) in 1962, Thiruvananthapuram became the cradle of India's ambitious space programme. The first Indian space rocket was developed and launched from
9462-627: The Sahara and the equatorial Atlantic Ocean. The ITCZ migrates northward from the equatorial Atlantic in February, reaches western Africa on or near June 22, then moves back to the south by October. The dry, northeasterly trade winds , and their more extreme form, the harmattan , are interrupted by the northern shift in the ITCZ and resultant southerly, rain-bearing winds during the summer. The semiarid Sahel and Sudan depend upon this pattern for most of their precipitation. The North American monsoon ( NAM ) occurs from late June or early July into September, originating over Mexico and spreading into
9628-473: The Vikram Sarabhai Space Centre (VSSC) in the outskirts of the city in 1963. Several establishments of the Indian Space Research Organisation (ISRO) were later established in Thiruvananthapuram. A significant milestone in the city's recent history was the establishment of Technopark —India's first IT park—in 1995. Technopark has developed into the largest IT park in the geographical area, employing around 62,000 people in 450 companies. Thiruvananthapuram
9794-402: The Vizhinjam International Seaport Thiruvananthapuram , as well as the Sree Padmanabhaswamy Temple , known as the richest temple in the world. Thiruvananthapuram is where India's space program began, with the Vikram Sarabhai Space Centre and the headquarters of Liquid Propulsion Systems Centre located here. Thiruvananthapuram is also known for its cultural heritage, being associated with
9960-410: The polar jets , the subtropical westerly jets , and the less common tropical easterly jets . They follow the principle of geostrophic winds . Over India, a subtropical westerly jet develops in the winter season and is replaced by the tropical easterly jet in the summer season. The high temperature during the summer over the Tibetan Plateau , as well as over Central Asia in general, is believed to be
10126-424: The poverty line in the city was 11,667. Thiruvananthapuram has witnessed massive immigration of workers from northern India, mainly Punjab , Haryana , and Madhya Pradesh , and Eastern India, mainly West Bengal and Bihar , and from neighbouring countries like Sri Lanka , the Maldives , Nepal and Bangladesh . The Corporation of Thiruvananthapuram or TMC oversees and manages the civic infrastructure of
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#173276522164110292-455: The return of the westerlies ) is the result of a resurgence of westerly winds from the Atlantic, where they become loaded with wind and rain. These westerly winds are a common phenomenon during the European winter, but they ease as spring approaches in late March and through April and May. The winds pick up again in June, which is why this phenomenon is also referred to as "the return of the westerlies". The rain usually arrives in two waves, at
10458-437: The 2011 national census, the Corporation of Thiruvananthapuram, which occupies an area of 214 km (83 sq mi), had a population of 957,730. The city's population density was 4,454/km (11,540/sq mi). The Urban Agglomeration had a population of 1,687,406 in 2011. The sex ratio is 1,040 females for every 1,000 males, which is higher than the national average. Thiruvananthapuram's literacy rate of 93.72% exceeds
10624-449: The Annual Survey of India's City-Systems (ASICS) conducted by the Janaagraha Centre for Citizenship and Democracy. The city was also selected as the best governed city in India in a survey conducted by Janaagraha Centre for citizenship and democracy in 2017. The city takes its name from the Malayalam word thiru-anantha-puram ( തിരുവനന്തപുരം [t̪iɾuʋɐnɐn̪d̪ɐpuɾɐm] ), meaning "The City of Lord Ananta", referring to
10790-486: The EASM grew in strength, but it has been suggested to have decreased in strength during Heinrich events . The EASM expanded its influence deeper into the interior of Asia as sea levels rose following the LGM; it also underwent a period of intensification during the Middle Holocene, around 6,000 years ago, due to orbital forcing made more intense by the fact that the Sahara at the time was much more vegetated and emitted less dust. This Middle Holocene interval of maximum EASM
10956-406: The ENSO effect was statistically effective in explaining several past droughts in India, in recent decades, its relationship with the Indian monsoon seemed to weaken. For example, the strong El niño of 1997 did not cause drought in India. However, it was later discovered that, just like ENSO in the Pacific Ocean, a similar seesaw ocean-atmosphere system in the Indian Ocean was also in play. This system
11122-406: The East Asian Winter Monsoon (EAWM) became stronger as the subarctic front shifted southwards. An abrupt intensification of the EAWM occurred 5.5 million years ago. The EAWM was still significantly weaker relative to today between 4.3 and 3.8 million years ago but abruptly became more intense around 3.8 million years ago as crustal stretching widened the Tsushima Strait and enabled greater inflow of
11288-405: The GDP and employs 70% of the population) is heavily dependent on the rains, for growing crops especially like cotton , rice , oilseeds and coarse grains. A delay of a few days in the arrival of the monsoon can badly affect the economy, as evidenced in the numerous droughts in India in the 1990s. The monsoon is widely welcomed and appreciated by city-dwellers as well, for it provides relief from
11454-445: The Late Holocene, significant glacial accumulation in the Himalayas still occurred due to cold temperatures brought by westerlies from the west. During the Middle Miocene , the July ITCZ, the zone of rainfall maximum, migrated northwards, increasing precipitation over southern China during the East Asian Summer Monsoon (EASM) while making Indochina drier. During the Late Miocene Global Cooling (LMCG), from 7.9 to 5.8 million years ago,
11620-402: The Pacific were impeded from flowing into the Indian Ocean. It is believed that the resulting increase in sea surface temperatures in the Indian Ocean increased the intensity of monsoons. In 2018, a study of the SAM's variability over the past million years found that precipitation resulting from the monsoon was significantly reduced during glacial periods compared to interglacial periods like
11786-449: The Seasonal Prediction of Indian Monsoon (SPIM) experiment on the PARAM Padma supercomputing system. This project involved simulated runs of historical data from 1985 to 2004 to try to establish the relationship of five atmospheric general circulation models with monsoon rainfall distribution. The department has tried to forecast the monsoon for India since 1884, and is the only official agency entrusted with making public forecasts about
11952-481: The Southern Hemisphere have to cross the equator to reach it. However, because of the Coriolis effect (which causes winds in the Northern Hemisphere to turn right, whereas winds in the Southern Hemisphere turn left), these southeast trade winds are deflected east in the Northern Hemisphere, transforming into southwest trades. These pick up moisture while traveling from sea to land and cause orographic rain once they hit
12118-553: The Southwest Monsoon first hits the Western Ghats of the coastal state of Kerala , India, thus making this area the first state in India to receive rain from the Southwest Monsoon. This branch of the monsoon moves northwards along the Western Ghats ( Konkan and Goa ) with precipitation on coastal areas, west of the Western Ghats. The eastern areas of the Western Ghats do not receive much rain from this monsoon as
12284-535: The Southwest Monsoon, receive rain from this Monsoon. About 50% to 60% of the rain received by the state of Tamil Nadu is from the Northeast Monsoon. In Southern Asia, the northeastern monsoons take place from October to December when the surface high-pressure system is strongest. The jet stream in this region splits into the southern subtropical jet and the polar jet. The subtropical flow directs northeasterly winds to blow across southern Asia, creating dry air streams which produce clear skies over India. Meanwhile,
12450-458: The TMC include water supply, drainage and sewerage, sanitation, solid-waste management, and building regulation. The Thiruvananthapuram Development Authority is responsible for the statutory planning and development of the greater Thiruvananthapuram region. As the seat of the Government of Kerala , Thiruvananthapuram is home to not only the offices of the local governing agencies but also
12616-478: The Tibetan Plateau, coupled with associated terrain features like the high altitude of the plateau, generate the tropical easterly jet over central India. This jet creates a low-pressure zone over the northern Indian plains , influencing the wind flow toward these plains and assisting the development of the southwest monsoon. The "bursting" of the monsoon is primarily explained by the jet stream theory and
12782-456: The Tibetan Plateau. This shift is due to the intense heating of the plateau during the summer months. The northward shift is not a slow and gradual process, as expected for most changes in weather pattern. The primary cause is believed to be the height of the Himalayas. As the Tibetan Plateau heats up, the low pressure created over it pulls the westerly jet north. Because of the lofty Himalayas,
12948-448: The air above coastal lands heats up faster than the air above seas. These create areas of low air pressure above coastal lands compared with pressure over the seas, causing winds to flow from the seas onto the neighboring lands. This is known as sea breeze . Also known as the thermal theory or the differential heating of sea and land theory , the traditional theory portrays the monsoon as a large-scale sea breeze . It states that during
13114-458: The air temperature remains relatively stable for two reasons: water has a relatively high heat capacity (3.9 to 4.2 J g K ), and because both conduction and convection will equilibrate a hot or cold surface with deeper water (up to 50 metres). In contrast, dirt, sand, and rocks have lower heat capacities (0.19 to 0.35 J g K ), and they can only transmit heat into the earth by conduction and not by convection. Therefore, bodies of water stay at
13280-495: The all-India average of 74%. It is a historical city where Malayalees form the vast majority of Thiruvananthapuram's population. There are also minorities like the Tamils and North Indians residing here. According to the 2011 census, 68.5% of the population is Hindu , 16.7% Christians and 13.7% Muslims . The remainder of the community includes Jains , Jews , Sikhs , Buddhists and other religions which account for 0.06% of
13446-464: The ancient political and cultural history of the city was almost entirely independent from that of the rest of Kerala. The Chera dynasty governed the area of Malabar Coast between Alappuzha in the south to Kasaragod in the north. This included Palakkad Gap , Coimbatore , Salem , and Kolli Hills . The region around Coimbatore was ruled by the Cheras during Sangam period between c. first and
13612-443: The anglicised name of the town), when the government decided to reinstate the city's original name Thiruvananthapuram. Thiruvananthapuram is a relatively modern region with trading traditions dating back to 1000 BCE. It is believed that the ships of King Solomon landed in a port called Ophir (now Poovar ) in Thiruvananthapuram in 1036 BCE. The city was the trading post of spices , sandalwood and ivory . However,
13778-583: The arrival at the Eastern Himalayas, the winds turns towards the west, travelling over the Indo-Gangetic Plain at a rate of roughly 1–2 weeks per state, pouring rain all along its way. June 1 is regarded as the date of onset of the monsoon in India, as indicated by the arrival of the monsoon in the southernmost state of Kerala. The monsoon accounts for nearly 80% of the rainfall in India. Indian agriculture (which accounts for 25% of
13944-467: The atmospheric component of the IOD was later discovered and the cumulative phenomenon named Equatorial Indian Ocean oscillation (EQUINOO). When EQUINOO effects are factored in, certain failed forecasts, like the acute drought of 2002, can be further accounted for. The relationship between extremes of the Indian summer monsoon rainfall, along with ENSO and EQUINOO, have been studied, and models to better predict
14110-519: The backwaters of Poovar and Anchuthengu and its Western Ghats tracts of Ponmudi and the Agastya Mala . In 2012, Thiruvananthapuram was named the best Kerala city to live in, by a field survey conducted by The Times of India . In 2013, the city was ranked the fifteenth best city to live in India, in a survey conducted by India Today . Thiruvananthapuram was ranked the best Indian city for two consecutive years, 2015 and 2016, according to
14276-525: The basis of the annual shifts in the position of global belts of pressure and winds. According to this theory, the monsoon is a result of the shift of the Intertropical Convergence Zone (ITCZ) under the influence of the vertical sun . Though the mean position of the ITCZ is taken as the equator, it shifts north and south with the migration of the vertical sun toward the Tropics of Cancer and Capricorn during
14442-507: The beginning of June, and again in mid- to late June. The European monsoon is not a monsoon in the traditional sense in that it doesn't meet all the requirements to be classified as such. Instead, the return of the westerlies is more regarded as a conveyor belt that delivers a series of low-pressure centres to Western Europe where they create unsettled weather. These storms generally feature significantly lower-than-average temperatures, fierce rain or hail, thunder, and strong winds. The return of
14608-414: The behaviour of the LC during Quaternary at close stratigraphic intervals. The South American summer monsoon (SASM) is known to have become weakened during Dansgaard–Oeschger events. The SASM has been suggested to have been enhanced during Heinrich events. Monsoons were once considered as a large-scale sea breeze caused by higher temperature over land than in the ocean. This is no longer considered as
14774-408: The bursting of monsoon rains over the Indian subcontinent. The reverse shift takes place for the northeast monsoon winds, leading to a second, minor burst of rainfall over the eastern Indian Peninsula during the Northern Hemisphere winter months. According to this theory, the onset of the southwest monsoon is driven by the shift of the subtropical westerly jet north from over the plains of India toward
14940-619: The cause and the monsoon is now considered a planetary-scale phenomenon involving the annual migration of the Intertropical Convergence Zone between its northern and southern limits. The limits of the ITCZ vary according to the land–sea heating contrast and it is thought that the northern extent of the monsoon in South Asia is influenced by the high Tibetan Plateau. These temperature imbalances happen because oceans and land absorb heat in different ways. Over oceans,
15106-454: The cause is primarily orographic , due to the presence of highlands in the path of the winds. Orographic barriers force wind to rise. Precipitation then occurs on the windward side of the highlands because of adiabatic cooling and condensation of the moist rising air. The unique geographic relief features of the Indian subcontinent come into play in allowing all of the above factors to occur simultaneously. The relevant features in explaining
15272-451: The city by October. The dry season sets in by December. The lowest temperature recorded in the city core was 17.8 °C (64.0 °F) on 6 January 1974 and the highest temperature was 38.2 °C (100.8 °F) on 21 February 2019. At the airport, the lowest temperature recorded was 16.4 °C (61.5 °F) on 15 January 1975 and the highest temperature was 36.3 °C (97.3 °F) on 5 May 1998. According to provisional results of
15438-545: The city's 100 wards. Each ward elects a councillor to the Corporation of Thiruvananthapuram. TMC has the power to act as the local government of the city. TMC is headed by the Mayor, who is elected from among the councillors. The Mayor is responsible for the overall supervision and control of the administrative functions of the TMC. The corporation discharges its services through standing committees. The corporation secretary
15604-429: The city, sandy loam soil is found, and on hilly eastern parts of the district, rich dark brown loam of granite origin is found. The Thiruvananthapuram Corporation is spread over 214.86 km (82.96 sq mi). The wider Thiruvananthapuram metropolitan area comprises Thiruvananthapuram corporation, three municipalities and 27 panchayats, as of 2011. Being the largest city in India's southern tip region, it
15770-495: The city. Prominent social reformers such as Sri Narayana Guru , Chattampi Swamikal , Ayyankali , Vakkom Moulavi and C. V. Raman Pillai also are from Thiruvananthapuram. Two of the three Malayalam triumvirate poets , Ulloor S. Parameswara Iyer and Kumaran Asan are from Thiruvananthapuram. Annual literature festivals like the Kovalam Literary Festival, are held in the city. Literary development
15936-826: The city. Other major highways in the city are State Highway 2 and State Highway 45 . The Mahatma Gandhi Road is the main arterial road in the city. Another important road is the Kowdiar Road, which is also known as the Royal Road, as it leads to the Kowdiar Palace. Thiruvananthapuram is a divisional headquarters in the Southern Railway zone of the Indian Railways . Long-distance trains originate from Thiruvananthapuram Central and Kochuveli railway terminals . Kochuveli railway terminal
16102-611: The city. The main bus stations in the city are the Central Bus Station in Thampanoor , where most of the long-distance buses ply from, and the city bus station in East Fort , where most city buses ply from. Three-wheeled, yellow and black auto-rickshaws and taxis, are other popular forms of public transport. Thiruvananthapuram Light Metro is a fully elevated metro rail – rapid transit system planned to ease
16268-713: The climax of summer heat in June. However, the roads take a battering every year. Often houses and streets are waterlogged and slums are flooded despite drainage systems. A lack of city infrastructure coupled with changing climate patterns causes severe economic loss including damage to property and loss of lives, as evidenced in the 2005 flooding in Mumbai that brought the city to a standstill. Bangladesh and certain regions of India like Assam and West Bengal , also frequently experience heavy floods during this season. Recently, areas in India that used to receive scanty rainfall throughout
16434-399: The colder months, the cycle is reversed. Then the land cools faster than the oceans and the air over the land has higher pressure than air over the ocean. This causes the air over the land to flow to the ocean. When humid air rises over the ocean, it cools, and this causes precipitation over the oceans. (The cool air then flows towards the land to complete the cycle.) Most summer monsoons have
16600-602: The collision of the Indian subcontinent and Asia around 50 million years ago. Because of studies of records from the Arabian Sea and that of the wind-blown dust in the Loess Plateau of China, many geologists believe the monsoon first became strong around 8 million years ago. More recently, studies of plant fossils in China and new long-duration sediment records from the South China Sea led to
16766-631: The congestion in the city. Thiruvananthapuram has a well-developed road transport infrastructure. The roads in the city are maintained by the Thiruvananthapuram Roads Development Company Limited (TRDCL) and Kerala PWD . TRDCL manages the 42 km city roads which come under the Thiruvananthapuram City Roads Improvement Project (TRCIP), which is the first urban road project in India. TRCIP
16932-415: The critical factor leading to the formation of the tropical easterly jet over India. The mechanism affecting the monsoon is that the westerly jet causes high pressure over northern parts of the subcontinent during the winter. This results in the north-to-south flow of the winds in the form of the northeast monsoon. With the northward shift of the vertical sun, this jet shifts north, too. The intense heat over
17098-594: The deity of the Sri Padmanabhaswamy Temple located in the city. Thiruvananthapuram is also known in literature, and popular reference as Ananthapuri , derived from the Sanskrit word Syanandurapuram , meaning "The City of Bliss" in Carnatic kirtanas composed by Swathi Thirunal , erstwhile Maharaja of Travancore . The city was officially referred to as Trivandrum until 1991 (Trivandrum being
17264-628: The direct control of the British Empire at any time, the city featured prominently in India's freedom struggle . The Indian National Congress had a very active presence in Thiruvananthapuram. A meeting of the Indian National Congress presided by Dr Pattabhi Sitaramaiah was held here in 1938. The Thiruvananthapuram Municipality came into existence in 1920 as the first municipality in the Travancore region. The municipality
17430-404: The direction of rain-bearing winds: Based on the time of year that these winds bring rain to India, the monsoon can also be categorized into two periods : The complexity of the monsoon of South Asia is not completely understood, making it difficult to accurately predict the quantity, timing, and geographic distribution of the accompanying precipitation. These are the most monitored components of
17596-443: The dynamic theory. According to this theory, during the summer months in the Northern Hemisphere, the ITCZ shifts north, pulling the southwest monsoon winds onto the land from the sea. However, the huge landmass of the Himalayas restricts the low-pressure zone onto the Himalayas themselves. It is only when the Tibetan Plateau heats up significantly more than the Himalayas that the ITCZ rises abruptly and swiftly shifts north, leading to
17762-465: The end of British rule in 1947, Travancore chose to join the Indian union. The first popularly elected ministry, headed by Pattom Thanu Pillai , was installed in office on 24 March 1948. In 1949, Thiruvananthapuram became the capital of Thiru-Kochi , the state formed by the integration of Travancore with its northern neighbour, the Kochi . The king of Travancore , Chitra Thirunal Bala Rama Varma , became
17928-519: The equator, the two tropics , the Arctic Circle and Antarctic Circle , and the two polar regions , giving rise to the trade winds , the westerlies , and the polar easterlies . However, geophysical factors like Earth's orbit , its rotation, and its axial tilt cause these belts to shift gradually north and south, following the Sun's seasonal shifts. The dynamic theory explains the monsoon on
18094-418: The establishment of the northeast and southwest monsoons, as well as unique features like "bursting" and variability. The jet streams are systems of upper-air westerlies. They give rise to slowly moving upper-air waves, with 250- knot winds in some air streams. First observed by World War II pilots, they develop just below the tropopause over areas of steep pressure gradient on the surface. The main types are
18260-596: The execution of the sewage system. Electricity is supplied by the Kerala State Electricity Board . Fire services are handled by the Kerala Fire And Rescue Services . Thiruvananthapuram's economy comprises Information Technology , education, plantations, aerospace, commerce and tourism . Thiruvananthapuram district contributes 10.31%, of the state's GDP. With an economic growth rate of 13.83%, Thiruvananthapuram
18426-558: The famous Padmanabhaswamy Temple , the city's architecture is championed by the Napier Museum and Thiruvananthapuram Zoo , one of the oldest zoos in India. Other architectural landmarks include Kuthira Malika Palace , Kowdiar Palace , Attukal temple , Beemapally Mosque , Connemara Market , and the Mateer Memorial Church . Thiruvananthapuram was the main centre of Laurie Baker 's architecture. Along with
18592-647: The fourth centuries CE and it served as the eastern entrance to the Palakkad Gap , the principal trade route between the Malabar Coast and Tamil Nadu . However the southern region of present-day Kerala state (The coastal belt between Thiruvananthapuram and Alappuzha ) was under Ay dynasty , who was more related to the Pandya dynasty of Madurai . The early rulers of the city were the Ays . Vizhinjam , which
18758-634: The headquarters of Kerala Prisons and Correctional Services . The Southern Air Command of the Indian Air Force is headquartered in the city. There are two state armed police battalions and a unit of the Central Reserve Police Force (CRPF) based in Thiruvananthapuram. The CRPF has a Group Headquarters (GHQ) located at Pallipuram . In addition to this, three units of the Central Industrial Security Force (CISF) and Sector Headquarters (SHQ) of
18924-493: The highlands of the Indian Peninsula. This results in the southwest monsoon. The dynamic theory explains the monsoon as a global weather phenomenon rather than just a local one. And when coupled with the traditional theory (based on the heating of sea and land), it enhances the explanation of the varying intensity of monsoon precipitation along the coastal regions with orographic barriers. This theory tries to explain
19090-436: The hot subtropical summers, the massive landmass of the Indian Peninsula heats up at a different rate than the surrounding seas, resulting in a pressure gradient from south to north. This causes the flow of moisture-laden winds from sea to land. On reaching land, these winds rise because of the geographical relief, cooling adiabatically and leading to orographic rains. This is the southwest monsoon . The reverse happens during
19256-459: The hot summers. This causes a low pressure area over the northern and central Indian subcontinent. To fill this void, the moisture-laden winds from the Indian Ocean rush into the subcontinent. These winds, rich in moisture, are drawn towards the Himalayas . The Himalayas act like a high wall, blocking the winds from passing into Central Asia, and forcing them to rise. As the clouds rise, their temperature drops, and precipitation occurs . Some areas of
19422-409: The king Marthanda Varma expanded the territory, founded the princely state of Travancore and made Thiruvananthapuram its capital. Travancore became the most dominant state in Kerala by defeating the powerful Zamorin of Kozhikode in the battle of Purakkad in 1755. Following India's independence in 1947, Thiruvananthapuram became the capital of Travancore–Cochin state and remained so until
19588-456: The major festivals of Onam , Vishu , Deepavali , and Navaratri , Christian and Islamic festivals like Christmas , Eid ul-Fitr , Bakrid and Milad-e-sheriff , the diverse ethnic populace of the city celebrates several local festivals like Attukal Pongala , Beemapally Uroos , Vettukaad Church Festival , Padmanabhaswamy Temple Aaraattu and Lakshadeepam festival. During the Onam festival,
19754-402: The mean daily rainfall over the affected regions. One of the most commonly used words to describe the erratic nature of the monsoon is "vagaries", used in newspapers, magazines, books, web portals to insurance plans, and India's budget discussions. In some years, it rains too much, causing floods in parts of India; in others, it rains too little or not at all, causing droughts. In some years,
19920-555: The mean dates. The exact criteria for a normal monsoon are defined by the India Meteorological Department with calculations for the mean and standard deviation of each of these variables. Theories of the mechanism of the monsoon primarily try to explain the reasons for the seasonal reversal of winds and the timing of their reversal. Because of differences in the specific heat capacity of land and water, continents heat up faster than seas. Consequently,
20086-513: The monsoon is not a simple response to heating but a more complex interaction of topography, wind and sea, as demonstrated by its abrupt rather than gradual withdrawal from the region. The Australian monsoon (the "Wet") occurs in the southern summer when the monsoon trough develops over Northern Australia . Over three-quarters of annual rainfall in Northern Australia falls during this time. The European Monsoon (more commonly known as
20252-480: The monsoon is one of the most anticipated, tracked, and studied weather phenomena in the region. It has a significant effect on the overall well-being of residents and has even been dubbed the "real finance minister of India". The word monsoon (derived from the Arabic "mausim", meaning "seasonal reversal of winds"), although generally defined as a system of winds characterized by a seasonal reversal of direction, lacks
20418-448: The monsoon mechanism are as follows: There are some unique features of the rains that the monsoon brings to the Indian subcontinent. Bursting of monsoon refers to the sudden change in weather conditions in India (typically from hot and dry weather to wet and humid weather during the southwest monsoon), characterized by an abrupt rise in the mean daily rainfall. Similarly, the burst of the northeast monsoon refers to an abrupt increase in
20584-569: The monsoon occurs over the Bay of Bengal in May, arriving at the Indian Peninsula by June, and then the winds move towards the South China Sea . Although the southwest and northeast monsoon winds are seasonally reversible, they do cause precipitation on their own. Two factors are essential for rain formation : Additionally, one of the causes of rain must happen. In the case of the monsoon,
20750-403: The monsoon, and they determine the water availability in India for any given year. Monsoons typically occur in tropical areas. One area that monsoons impact greatly is India. In India monsoons create an entire season in which the winds reverse completely. The rainfall is a result of the convergence of wind flow from the Bay of Bengal and reverse winds from the South China Sea . The onset of
20916-474: The monsoon, but understanding and predictability are still evolving. The unique geographical features of the Indian subcontinent , along with associated atmospheric, oceanic, and geographical factors, influence the behavior of the monsoon. Because of its effect on agriculture, on flora and fauna , and on the climates of nations such as Bangladesh , Bhutan , India , Nepal , Pakistan , and Sri Lanka – among other economic, social, and environmental effects –
21082-594: The most significant and leading centre of ISRO , and several space-related, state-owned ISRO centres such as Thumba Equatorial Rocket Launching Station , Liquid Propulsion Systems Centre , and ISRO Inertial Systems Unit are based in Thiruvananthapuram. The BrahMos Aerospace Trivandrum Limited is one of the leading missile integration and defence production units in India. Other enterprises include Travancore Titanium Products , Kerala Automobiles Limited , MILMA , English Indian Clays , Keltron , Trivandrum Rubber Works and HLL Lifecare Limited . Thiruvananthapuram
21248-460: The musical contributions of Swathi Thirunal Rama varma and the artistic legacy of painter Raja Ravi Varma .Notable beaches in Thiruvananthapuram include Kovalam , Varkala , Shankumugham Beach ,and Poovar .The encompassing urban agglomeration population is around 1.68 million. Located on the west coast of India near the extreme south of the mainland, Thiruvananthapuram is a major information technology hub in Kerala and contributes 55% of
21414-632: The new Indian state of Kerala was formed in 1956. Thiruvananthapuram is a notable academic and research hub and home to the University of Kerala , APJ Abdul Kalam Technological University , the regional headquarters of Indira Gandhi National Open University , and many other schools and colleges. Thiruvananthapuram is also home to research centers such as the National Institute for Interdisciplinary Science and Technology , Indian Space Research Organisation 's Vikram Sarabhai Space Centre ,
21580-576: The north between approximately 8,000 and 4,000 BP, and most recently retreated southward once more between 4,000 and 0 BP. The January ITCZ migrated further south to its present location during the Middle Miocene, strengthening the summer monsoon of Australia that had previously been weaker. Five episodes during the Quaternary at 2.22 Ma ( PL-1), 1.83 Ma (PL-2), 0.68 Ma (PL-3), 0.45 Ma (PL-4) and 0.04 Ma (PL-5) were identified which showed
21746-566: The northeast monsoon passing over the Bay of Bengal picks up moisture, causing rain in Andhra Pradesh and Tamil Nadu during the winter months. However, many meteorologists argue that the monsoon is not a local phenomenon as explained by the traditional theory, but a general weather phenomenon along the entire tropical zone of Earth . This criticism does not deny the role of differential heating of sea and land in generating monsoon winds, but casts it as one of several factors rather than
21912-413: The ocean to the land, bringing moist air inland. This moist air rises to a higher altitude over land and then it flows back toward the ocean (thus completing the cycle). However, when the air rises, and while it is still over the land, the air cools . This decreases the air's ability to hold water , and this causes precipitation over the land. This is why summer monsoons cause so much rain over land. In
22078-428: The only one. The prevailing winds of the atmospheric circulation arise because of the difference in pressure at various latitudes and act as means for distribution of thermal energy on the planet. This pressure difference is because of the differences in solar insolation received at different latitudes and the resulting uneven heating of the planet. Alternating belts of high pressure and low pressure develop along
22244-558: The people is Keralite cuisine , which is generally characterised by an abundance of coconut and spices . Other South Indian cuisines, as well as Chinese and North Indian cuisines, are popular. Thiruvananthapuram has many restaurants offering Arabic , Italian , Thai and Mexican cuisines. The majority of bus services are conducted by government operators. There are also private operators. The city buses operated by Kerala State Road Transport Corporation (KSRTC) are an important and reliable means of public transport available in
22410-491: The population; 0.85% did not state a belief in the census. Malayalam , the official state language, is the dominant language in Thiruvananthapuram City: English is also used, mainly by the white-collar workforce. Tamil has the most speakers after Malayalam . The city also has a few Tulu , Kannada, Konkani , Dhivehi , Telugu and Hindi speakers. As per the 2001 census, the population below
22576-544: The present day. The Indian Summer Monsoon (ISM) underwent several intensifications during the warming following the Last Glacial Maximum, specifically during the time intervals corresponding to 16,100–14,600 BP, 13,600–13,000 BP, and 12,400–10,400 BP as indicated by vegetation changes in the Tibetan Plateau displaying increases in humidity brought by an intensifying ISM. Though the ISM was relatively weak for much of
22742-458: The princely state of Thiruvithamkoor and Thiruvananthapuram was made the capital in 1795 after shifting the capital from Padmanabhapuram in Kanyakumari district. Thiruvananthapuram became a prominent city in Kerala under Marthanda Varma . As a result of the annexation of neighbouring chiefdoms, the artists and scholars from these places migrated to Thiruvananthapuram, turning it into
22908-513: The quantity of monsoon rains have been statistically derived. Since 1950s, the South Asian summer monsoon has been exhibiting large changes, especially in terms of droughts and floods. The observed monsoon rainfall indicates a gradual decline over central India, with a reduction of up to 10%. This is primarily due to a weakening monsoon circulation as a result of the rapid warming in the Indian Ocean, and changes in land use and land cover, while
23074-682: The quantity, distribution, and timing of the monsoon rains. Its position as the sole authority on the monsoon was cemented in 2005 by the Department of Science and Technology (DST) , New Delhi. In 2003, IMD substantially changed its forecast methodology, model, and administration. A sixteen-parameter monsoon forecasting model used since 1988 was replaced in 2003. However, following the 2009 drought in India (worst since 1972), The department decided in 2010 that it needed to develop an "indigenous model" to further improve its prediction capabilities. Monsoon A monsoon ( / m ɒ n ˈ s uː n / )
23240-402: The rain quantity is sufficient but its timing arbitrary. Sometimes, despite average annual rainfall, the daily distribution or geographic distribution of the rain is substantially skewed. In the recent past, rainfall variability in short time periods (about a week) were attributed to desert dust over the Arabian Sea and Western Asia. Normally, the southwest monsoon can be expected to "burst" onto
23406-510: The region. Examples are the formation of a rare low-latitude tropical storm in 2001, Tropical Storm Vamei , and the devastating flood of Jakarta in 2007. The onset of the monsoon over Australia tends to follow the heating maxima down Vietnam and the Malay Peninsula (September), to Sumatra , Borneo and the Philippines (October), to Java , Sulawesi (November), Irian Jaya and northern Australia (December, January). However,
23572-454: The reverse happens, making Indonesia much warmer and rainier. A positive IOD index often negates the effect of ENSO, resulting in increased monsoon rains in years such as 1983, 1994, and 1997. Further, the two poles of the IOD – the eastern pole (around Indonesia) and the western pole (off the African coast) — independently and cumulatively affect the quantity of monsoon rains. As with ENSO,
23738-413: The role of aerosols remains elusive. Since the strength of the monsoon is partially dependent on the temperature difference between the ocean and the land, higher ocean temperatures in the Indian Ocean have weakened the moisture bearing winds from the ocean to the land. The reduction in the summer monsoon rainfall has grave consequences over central India because at least 60% of the agriculture in this region
23904-634: The southern oscillation was found to be simply an atmospheric component of the El Niño/La Niña effect, which happens in the ocean. Therefore, in the context of the monsoon, the two together came to be known as the El Niño–Southern Oscillation (ENSO) effect. The effect is known to have a pronounced influence on the strength of the southwest monsoon over India, with the monsoon being weak (causing droughts) during El Niño years, while La Niña years bring particularly strong monsoons. Although
24070-559: The southwest United States by mid-July. It affects Mexico along the Sierra Madre Occidental as well as Arizona , New Mexico , Nevada , Utah , Colorado , West Texas and California . It pushes as far west as the Peninsular Ranges and Transverse Ranges of Southern California, but rarely reaches the coastal strip (a wall of desert thunderstorms only a half-hour's drive away is a common summer sight from
24236-463: The state government conducts several cultural events for a week in the city. The Attukal Pongala festival attracts millions of women devotees from across India and abroad. It is the largest gathering of women in the world. Germany's Goethe Zentrum, France's Alliance Française and Russia's Gorky Bhavan centres host a wide range of events and programmes throughout the year. The general cuisine of
24402-434: The state was started during the same period. Sanskrit College , Ayurveda College, Law College and a second-grade college for women were started by Moolam Thirunal (1885–1924). The early 20th century was an age of tremendous political and social changes in the city. The Sree Moolam Popular Assembly , established in 1904, was the first democratically elected legislative council in any Indian state. Despite not being under
24568-410: The state's software exports as of 2016. Referred to by Mahatma Gandhi as the "Evergreen city of India", the city is characterised by its undulating terrain of low coastal hills. The present regions that constitute Thiruvananthapuram were ruled by the Ays who were related to feudatories of the Chera dynasty . In the 12th century, it was conquered by the Kingdom of Venad . In the 18th century,
24734-496: The subcontinent receive up to 10,000 mm (390 in) of rain annually. The southwest monsoon is generally expected to begin around the beginning of June and fade away by the end of September. The moisture-laden winds on reaching the southernmost point of the Indian Peninsula , due to its topography, become divided into two parts: the Arabian Sea Branch and the Bay of Bengal Branch . The Arabian Sea Branch of
24900-546: The summer monsoon shifts through a series of dry and rainy phases as the rain belt moves northward, beginning over Indochina and the South China Sea (May), to the Yangtze River Basin and Japan (June) and finally to northern China and Korea (July). When the monsoon ends in August, the rain belt moves back to southern China. The rainy season occurs from September to February and it is a major source of energy for
25066-477: The summer of the respective hemispheres (Northern and Southern Hemisphere). As such, during the northern summer (May and June), the ITCZ moves north, along with the vertical sun, toward the Tropic of Cancer. The ITCZ, as the zone of lowest pressure in the tropical region, is the target destination for the trade winds of both hemispheres. Consequently, with the ITCZ at the Tropic of Cancer, the southeast trade winds of
25232-690: The sunny skies along the coast during the monsoon). The North American monsoon is known to many as the Summer , Southwest , Mexican or Arizona monsoon. It is also sometimes called the Desert monsoon as a large part of the affected area are the Mojave and Sonoran deserts . However, it is controversial whether the North and South American weather patterns with incomplete wind reversal should be counted as true monsoons. The Asian monsoons may be classified into
25398-483: The variability in timing and strength of the monsoon. Timing: A timely northward shift of the subtropical westerly jet at the beginning of summer is critical to the onset of the southwest monsoon over India. If the shift is delayed, so is the southwest monsoon. An early shift results in an early monsoon. Strength: The strength of the southwest monsoon is determined by the strength of the easterly tropical jet over central India. A strong easterly tropical jet results in
25564-764: The warm Tsushima Current into the Sea of Japan. Circa 3.0 million years ago, the EAWM became more stable, having previously been more variable and inconsistent, in addition to being enhanced further amidst a period of global cooling and sea level fall. The EASM was weaker during cold intervals of glacial periods such as the Last Glacial Maximum (LGM) and stronger during interglacials and warm intervals of glacial periods. Another EAWM intensification event occurred 2.6 million years ago, followed by yet another one around 1.0 million years ago. During Dansgaard–Oeschger events ,
25730-486: The westerlies affects Europe's Northern Atlantic coastline, more precisely Ireland, Great Britain, the Benelux countries , western Germany, northern France and parts of Scandinavia. Thiruvananthapuram Thiruvananthapuram ( / ˌ t ɪ r uː v ə ˌ n ʌ n t ə ˈ p ʊər ə m / TIRR -oo-və- NUN -təp- OOR -əm ; Malayalam: [t̪iɾuʋɐnɐn̪d̪ɐpuɾɐm] ), formerly known as Trivandrum ,
25896-409: The westerly jet's movement is inhibited. But with continuous dropping pressure, sufficient force is created for the movement of the westerly jet across the Himalayas after a significant period. As such, the shift of the jet is sudden and abrupt, causing the bursting of southwest monsoon rains onto the Indian plains. The reverse shift happens for the northeast monsoon. The jet stream theory also explains
26062-486: The western coast of India (near Thiruvananthapuram ) at the beginning of June and to cover the entire country by mid-July. Its withdrawal from India typically starts at the beginning of September and finishes by the beginning of October. The northeast monsoon usually "bursts" around 20 October and lasts for about 50 days before withdrawing. However, a rainy monsoon is not necessarily a normal monsoon – that is, one that performs close to statistical averages calculated over
26228-607: The wind does not cross the Western Ghats. The Bay of Bengal Branch of Southwest Monsoon flows over the Bay of Bengal heading towards north-east India and Bengal , picking up more moisture from the Bay of Bengal. The winds arrive at the Eastern Himalayas with large amounts of rain. Mawsynram , situated on the southern slopes of the Khasi Hills in Meghalaya , India, is one of the wettest places on Earth. After
26394-399: The winter, when the land is colder than the sea, establishing a pressure gradient from land to sea. This causes the winds to blow over the Indian subcontinent toward the Indian Ocean in a northeasterly direction, causing the northeast monsoon . Because the southwest monsoon flows from sea to land, it carries more moisture, and therefore causes more rain, than the northeast monsoon. Only part of
26560-763: The world which fulfil the Sustainable Development Goals of the UN Agenda 2030. Thiruvananthapuram is served by National Highway 66 of India's National Highways system . The city is connected to the North-South Corridor of the National Highway system at Aralvaimozhi , which is 80 km south of the city. The State Highway 1 , which commonly known as the Main Central Road is an arterial highway in
26726-536: The year, like the Thar Desert , have surprisingly ended up receiving floods due to the prolonged monsoon season. The influence of the Southwest Monsoon is felt as far north as in China's Xinjiang . It is estimated that about 70% of all precipitation in the central part of the Tian Shan Mountains falls during the three summer months, when the region is under the monsoon influence; about 70% of that
26892-547: The years 1950 to 2015, over the entire central belt of India, leading to a steady rise in the number of flash floods with significant socioeconomic losses. Widespread extreme rainfall events are those rainfall events which are larger than 150 mm/day and spread over a region large enough to cause floods. Since the Great Famine of 1876–1878 in India, various attempts have been made to predict monsoon rainfall. At least five prediction models exist. The Centre for Development of Advanced Computing (CDAC) at Bengaluru facilitated
27058-471: Was associated with an expansion of temperate deciduous forest steppe and temperate mixed forest steppe in northern China. By around 5,000 to 4,500 BP, the East Asian monsoon's strength began to wane, weakening from that point until the present day. A particularly notable weakening took place ~3,000 BP. The location of the EASM shifted multiple times over the course of the Holocene: first, it moved southward between 12,000 and 8,000 BP, followed by an expansion to
27224-429: Was converted into a corporation on 30 October 1940, during the period of Chitra Thirunal Bala Rama Varma , who took over in 1931. The city witnessed multi-faceted progress during his period. The promulgation of the " Temple Entry Proclamation " (1936) was an act that underlined social emancipation. This era also saw the establishment of the University of Travancore in 1937, which later became Kerala University . With
27390-461: Was discovered in 1999 and named the Indian Ocean Dipole (IOD). An index to calculate it was also formulated. IOD develops in the equatorial region of the Indian Ocean from April to May and peaks in October. With a positive IOD, winds over the Indian Ocean blow from east to west. This makes the Arabian Sea (the western Indian Ocean near the African coast) much warmer and the eastern Indian Ocean around Indonesia colder and drier. In negative dipole years,
27556-424: Was started in Thiruvananthapuram. The first Malayalam feature film, Vigathakumaran directed by J. C. Daniel was released in Thiruvananthapuram. J. C. Daniel is considered the father of Malayalam film industry. He also established the first film studio in Kerala, the Travancore National Pictures at Thiruvananthapuram in 1926. The International Film Festival of Kerala (IFFK), which is held every year in December,
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