Misplaced Pages

#510489

111-481: The Taiya River is unique as it passes through a number of different ecosystems over a short distance. From alpine tundra to temperate rainforest a variety of fauna and flora reside in the Taiya River and its valley. The Taiya River valley and the synonymous Taiya River watershed are actually confined to a very small area as the valley is a very steep-sided glaciated valley (as a sidenote, because of glaciation,

222-708: A common usage for the body of water in 1868. The Taiya River is historically significant with its role in the Klondike Gold Rush . The river's terminus, the Taiya Inlet, was also home to the Klondike boom town of Dyea which was the start of the Chilkoot Trail . The sediment from the Taiya River in the Taiya Inlet made a deep-water dock in Dyea impossible. This was one (but not the only reason) for

333-675: A few inches tall, with weak root systems. Other common plant life-forms include prostrate shrubs ; tussock -forming graminoids ; cushion plants ; and cryptogams , such as bryophytes and lichens . Relative to lower elevation areas in the same region, alpine regions have a high rate of endemism and a high diversity of plant species. This taxonomic diversity can be attributed to geographical isolation , climate changes , glaciation , microhabitat differentiation, and different histories of migration or evolution or both. These phenomena contribute to plant diversity by introducing new flora and favoring adaptations , both of new species and

444-450: A few yards of each other, depending on topography, substrate, and climate. Alpine vegetation generally occurs in a mosaic of small patches with widely differing environmental conditions. Vegetation types vary from cushion and rosette plants on the ridges and in the rock crannies; to herbaceous and grassy vegetation along the slopes; dwarf shrubs with grasses and forbs below the melting snowdrifts; and sedges, grasses, low shrubs, and mosses in

555-516: A location is dependent on the season, orientation and bearing with respect to the Sun , and the mass of the mountain. As the Sun is the major contributor to the temperature, it is often directly proportional to the received radiation from the Sun with faces receiving more sunlight having a higher heat buildup. In narrow valleys between steep mountain faces, the weather conditions may differ significantly on both

666-633: A mountain is roughly equivalent to moving 80 kilometers (45 miles or 0.75° of latitude) towards the pole. This relationship is only approximate, however, since local factors such as proximity to oceans can drastically modify the climate. In the alpine tundra, trees cannot tolerate the environmental conditions (usually cold temperatures, extreme snowpack, or associated lack of available moisture). Typical high-elevation growing seasons range from 45 to 90 days, with average summer temperatures near 10 °C (50 °F). Growing season temperatures frequently fall below freezing, and frost occurs throughout

777-495: A notable increase in the rate of glacier retreat across the region as a result of climate change. The rate of retreat varies across regions depending on the local conditions. Since 1975, a marked increase in the loss of glacial mass from 5–13 Gt/yr to 16–24 Gt/yr has been observed with an estimated 13% overall decrease in glacial coverage in the Himalayas. The resulting climate variations and changes in hydrology could affect

888-454: A relationship between the Arctic and Antarctic tree lines and the 10 °C summer isotherm; i.e., places where the average temperature in the warmest calendar month of the year is below 10 °C cannot support forests. See Köppen climate classification for more information. Otto Nordenskjöld theorized that winter conditions also play a role: His formula is W = 9 − 0.1 C , where W is

999-824: Is a mountain range in Asia, separating the plains of the Indian subcontinent from the Tibetan Plateau . The range has several peaks exceeding an elevation of 8,000 m (26,000 ft) including Mount Everest , the highest mountain on Earth. The mountain range runs for 2,400 km (1,500 mi) as an arc from west-northwest to east-southeast at the northern end of the Indian subcontinent. The Himalayas occupy an area of 595,000 km (230,000 sq mi) across six countries – Afghanistan , Bhutan , China , India , Nepal , and Pakistan . The sovereignty of

1110-716: Is also the source of major streams of the Ganges river system. The Eastern Himalayas form the eastern most stretch of the range and consist of the states of parts of Tibet in China, Sikkim , Assam , Arunachal Pradesh , parts of other North East Indian states and north West Bengal in India, entirety of Bhutan, mountain regions of central and eastern Nepal, and most of the western lowlands in Nepal. The eastern Himalayas broadly consists of two regions–the western Nepal Himalayas and

1221-518: Is among the highest in the world, at typically around 5,500 m (18,000 ft) while several equatorial mountains such as in New Guinea , the Rwenzoris , and Colombia , have a snow line at 900 m (3,000 ft) lower. As the physical features of mountains are irregular, with broken jagged contours, there can be wide variations in temperature over short distances. The temperature at

SECTION 10

#1732780704511

1332-479: Is amongst the most affected regions due to climate change . Since the late 20th century, scientists have reported a notable increase in the rate of glacier retreat and changes occurring at a far rapid rate. As per a 2019 assessment, the Himalayan region, which had experienced a temperature rise of 0.1 °C (32.2 °F) per decade was warming at an increased rate of 0.1 °C (32.2 °F) per decade over

1443-492: Is followed by monsoon rains from June to September. The post monsoon season is largely devoid of rain and snow before beginning of cold winters in December-January with intermediate spring before the summer. There are localised wind pressure systems at high altitudes resulting in heavy winds. Due to its high altitude, the range blocks the flow of cold winds from the north into the Indian subcontinent. This causes

1554-603: Is found in the mixed deciduous and conifer forests of the Eastern Himalayas and the Himalayan water shrew are found on the river banks. The forests of the foothills are inhabited by several different primates, including the endangered Gee's golden langur and the Kashmir gray langur , within highly restricted ranges in the east and west of the Himalayas, respectively. The yaks are large domesticated cattle found in

1665-560: Is home to more than a billion people. In 2011, the population in the Himalayan region was estimated to be about 52.8 million with the combined drainage basin of the Himalayan rivers home to nearly 600 million. Of this, 7.96 million (15.1% of the total Himalayan population) live in Eastern Himalayas, 19.22 million in Central Himalayas (36.4%), and 25.59 million reside in Western Himalayas (48.5%). The population of

1776-456: Is observed. Alpine areas are unique because of the severity and complexity of their environmental conditions. Very small changes in topography – as small as 1 foot (0.3 m) or less – may mean the difference between a windswept area or an area of snow accumulation, changing the potential productivity and plant community drastically. Between these extremes of drought versus saturation , several intermediate environments may exist all within

1887-614: Is one of the youngest mountain ranges on the planet and consists of uplifted sedimentary and metamorphic rock . According to the modern theory of plate tectonics , it was formed as a result of a continental collision and orogeny along the convergent boundary between the India and Eurasian Plates . During the Jurassic period (201 to 145 mya ), the Tethys Ocean formed the southern border of then existent Eurasian landmass. When

1998-653: Is popular with fishermen. It has a watershed council, the Taiya Inlet Watershed Council partially dedicating to its protection and its recreational users. Alpine tundra Alpine tundra is a type of natural region or biome that does not contain trees because it is at high elevation , with an associated harsh climate . As the latitude of a location approaches the poles, the threshold elevation for alpine tundra gets lower until it reaches sea level, and alpine tundra merges with polar tundra . The high elevation causes an adverse climate, which

2109-580: Is the lower middle sub-section of the Himalayas. It extends almost along the entire length of the Himalayas and is about 75 km (47 mi) wide. It is mostly composed of rocky surfaces and has an average elevation of 3,700–4,500 m (12,100–14,800 ft). The Greater Himalayas (also known as Himadri ) form the highest section of the Himalayas and extend for about 2,300 km (1,400 mi) from northern Pakistan to northern Arunachal Pradesh in India. The sub-range has an average elevation of more than 6,100 m (20,000 ft) and contains many of

2220-419: Is too cold and windy to support tree growth. Alpine tundra transitions to sub-alpine forests below the tree line ; stunted forests occurring at the forest-tundra ecotone are known as krummholz . With increasing elevation it ends at the snow line where snow and ice persist through summer. Alpine tundra occurs in mountains worldwide. The flora of the alpine tundra is characterized by dwarf shrubs close to

2331-875: The Alps and Pyrenees of Europe, the Himalaya and Karakoram of Asia, the Andes of South America, the Eastern Rift mountains of Africa, the Snowy Mountains of Australia, the South Island of New Zealand, and the Scandinavian Mountains . Alpine tundra occupies high-mountain summits, slopes, and ridges above timberline. Aspect plays a role as well; the treeline often occurs at higher elevations on warmer equator-facing slopes. Because

SECTION 20

#1732780704511

2442-755: The Andaman Sea . The Salween , Mekong , Yangtze , and Yellow Rivers all originate from parts of the Tibetan Plateau, north of the great water divide. These are considered distinct from the Himalayan watershed and are known as circum-Himalayan rivers. The Himalayan region has multiple lakes across various elevations including endorheic freshwater and saline lakes . The geology of the lakes vary across geographies depending on various factors such as altitude, climate, water source, and lithology . Tarns are high altitude mountain lakes situated above 5,500 m (18,000 ft) and are formed primarily by

2553-512: The Bay of Bengal were also formed as a result of the same tectonic processes that formed the Himalayas. The Indian plate continues to be driven horizontally at the Tibetan Plateau at about 67 mm (2.6 in) per year, forcing it to continue to move upwards. About 20 mm (0.79 in) per year is absorbed by thrusting along the Himalaya southern front , which leads to the Himalayas rising by about 5 mm (0.20 in) per year. This makes

2664-663: The Dihang River to the India-Tibet border. The highest peak is the eastern anchor Namcha Barwa at 7,756 m (25,446 ft). The region is the source of many of the tributaries of the Brahmaputra River and consists of major mountain passes such as Nathu La , and Jelep La . Beyond the Dihang valley, the mountains extend as Purvanchal mountain range across the eastern boundary of India. The Himalayan range

2775-490: The Everest . At lower altitudes, the temperature is pleasantly warm during the summers. During winters, the low-pressure weather systems from the west cause heavy snowfall . There are two periods of precipitation with most of the rainfall occurring during the post summer season and moderate amount during the winter storms. The Himalayan range obstructs the path of the south west monsoon winds, causing heavy precipitation on

2886-761: The Indian epic Mahabharata , which is the personification of the Hindu deity Himavan . The mountain range is known as Himālaya in Hindi and Nepali (both written हिमालय ), Himalaya ( ཧི་མ་ལ་ཡ་ ) in Tibetan , Himāliya ( سلسلہ کوہ ہمالیہ ) in Urdu , Himaloy ( হিমালয় ) in Bengali , and Ximalaya ( simplified Chinese : 喜马拉雅 ; traditional Chinese : 喜馬拉雅 ; pinyin : Xǐmǎlāyǎ ) in Chinese . It

2997-520: The Indian subcontinent and the regions north of the range. The mountains are spread across more than eight degrees of latitude and hence includes a wide range of climatic zones including sub-tropical , temperate , and semi-arid . The climate in a region is determined by factors such as altitude, latitude, and the impact on monsoon. There are generally five seasons: summer, monsoon, autumn or post-monsoon, winter, and spring. The summer in April-May

3108-602: The Kashmir valley . The higher elevations consist of rock fragements and lithosols with very low humus content. The Himalayas and the Central Asian mountain ranges consist of the third-largest deposit of ice and snow in the world, after the Antarctic and Arctic regions. It is often referred to as the "Third Pole" as it encompasses about 15,000 glaciers, which store about 12,000 km (2,900 cu mi) of fresh water. The South Col and Khumbu Glacier in

3219-516: The Kumaon region. The northern extremes of the Great Himalayas in Kashmir and Ladakh receive only 3–6 in (76–152 mm) of rainfall per year. During the winter season, a high pressure system develops over Central Asia, which results in winds flowing towards the Himalayas. However, due to the presence of less water bodies in the Central Asian region, the moisture content is low. As

3330-1272: The Main Frontal Thrust and the Main Boundary Thrust (MBT); the Lesser Himalayan Zone between the MBT and the Main Central Thrust (MCT); the Higher Himalayan Zone beyond the MCT; the Tethyan Zone, separated by the South Tibetan Detachment System; and the Indus-Tsangpo Suture Zone, where the Indian plate is subducted below the Asian plate. The Arakan Yoma highlands in Myanmar and the Andaman and Nicobar Islands in

3441-481: The Mount Everest region are amongst the world's highest glaciers. The Gangotri which is 32 km (20 mi) long and is one of the largest glaciers, is one of the sources of the Ganges . The Himalayan glaciers show considerable variation in the rate of descent. The Khumbu moves about 1 ft (0.30 m) daily compared to certain other glaciers which move about 6 ft (1.8 m) per day. During

Taiya River - Misplaced Pages Continue

3552-454: The Paris agreement , aimed at climate change mitigation and adaptation . The actions are aimed at reducing emissions , increase the usage of renewable energy , and sustainable environmental practices. As the local population increasingly experience the impact of the changes in climate such as variations in temperature and precipitation, and change in vegetation, they are forced to adapt for

3663-738: The Sivalik Hills on the south; the Lower Himalayas ; the Great Himalayas , which is the highest and central range; and the Tibetan Himalayas on the north. The Sivalik Hills form the lowest sub-Himalayan range and extends for about 1,600 km (990 mi) from the Teesta River in the Indian state of Sikkim to northern Pakistan. The name derives from Sanskrit meaning "Belonging to Shiva ", which

3774-542: The Western Himalayas has characteristics of species from Central Asia and Mediterranean region. Fossils of species such as giraffe , and hippopotamus have been found in the foothills, suggesting the presence of African species some time ago. Large mammals such as Indian elephant , and Indian rhinoceros are confined to the densely forested moist ecosystems in the Eastern and Central Himalayas. Many of

3885-473: The Yarlung Tsangpo River . The Himalayas consists of four parallel mountain ranges: the Sivalik Hills on the south; the Lower Himalayas ; the Great Himalayas , which is the highest and central range; and the Tibetan Himalayas on the north. The range varies in width from 350 km (220 mi) in the north-west to 150 km (93 mi) in the south-east. The Himalayan range is one of

3996-517: The Zanskar , Pir Panjal Ranges , and parts of the Sivalik and Great Himalayas. The western anchor Nanga Parbat is the highest point in the region at 8,126 m (26,660 ft). It is also referred Punjab, Kashmir or Himachal Himalyas from west to east locally. The central Himalayas or Kumaon extend for about 320 km (200 mi) along the state of Uttarakhand in northern India from

4107-631: The last ice age , there was a connected ice stream of glaciers between Kangchenjunga in the east and Nanga Parbat in the west. The glaciers joined with the ice stream network in the Karakoram in the west, the Tibetan inland ice in the north, and came to an end below an elevation of 1,000–2,000 m (3,300–6,600 ft) in the south. While the current valley glaciers of the Himalaya reach at most 20–32 km (12–20 mi) in length, several of

4218-410: The 18th century till the independence of the constituent states in the mid 20th century. The long history along with various outside influences have resulted in the mixture of various traditions and existence of wide range of ethnicity in the region. People speak various languages belonging to four principal language families– Indo-European , Tibeto-Burman , Austroasiatic , and Dravidian , with

4329-635: The Brahmaputra river system from the Tibetan rivers to the north. There are 19 major rivers in the Himalayas which form part of the two major river systems of Ganges - Brahmaputra , which follow an easterly course and Indus , which follows a north-westerly course. The northern slopes of Gyala Peri and the peaks beyond the Tsangpo drain into the Irrawaddy River , which originates in eastern Tibet and flows south through Myanmar to drain into

4440-420: The Himalayan lakes present the danger of a glacial lake outburst flood as they have grown considerably over the last 50 years due to glacial melting. While these lakes support a range of ecosystems and local communities, many of them remain poorly studied in terms of their hydrology and biodiversity. Due to its location and size, the Himalayas acts as a climatic barrier which affects the weather conditions of

4551-413: The Himalayan region geologically active and the movement of the Indian plate into the Asian plate makes the region seismically active, leading to earthquakes from time to time. The northern slopes of the Himalayas have a thicker soil cover than the southern slopes due to presence of lesser number of rivers and streams. These soils are loamy and are dark brown in colour, and are covered with forests in

Taiya River - Misplaced Pages Continue

4662-591: The Himalayan region including Bhutan, Nepal, Bangladesh, India, and Pakistan are amongst the most vulnerable countries in the Global South due to climate change. The temperature rise increases the incidence of tropical diseases such as malaria , and dengue further north. The extreme weather events might cause physical harm directly and indirectly due to lack of access and contamination of drinking water , pollution , exposure to chemicals, and destruction of crops, and drought . The climate change also impact

4773-630: The Himalayan region occurred in 2000 BCE when Aryans came from Central Asia and progressively settled along the plains to the south. Information on the Aryan culture in the region is found in Hindu literature such as the Vedas , and Puranas . Since the second century BCE, the Silk Road in China was connected to the Indian subcontinent by various routes running along the Himalayan region. The northern side of

4884-433: The Himalayan waters. The extremes of high altitude favor the presence of extremophile organisms, which include various species of insects such as spiders , and mites . The Himalayan fauna include endemic plants and animals and critically endangered or endangered species such as Indian elephant, Indian rhinoceros, musk deer and hangul . There are more than 7,000 endemic plants and 1.9% of global endemic vertebrates in

4995-426: The Himalayas has grown considerably over the last five decades from 19.9 million in 1961 with the annual growth rate (3.31%) more than three times higher than the world average (1.1%) during the same period. The earliest tribes in the Himalayas might have originated from Dravidian people from the south of the Indian subcontinent as evidenced by the presence of Dravidian languages . The major human migration towards

5106-447: The Himalayas reduce by 2 °C (36 °F) for every 300 m (980 ft) increase of altitude. Higher altitudes invariably experience low temperatures. In the Eastern Himalayas, Darjeeling at an altitude of 1,945 m (6,381 ft) has an average minimum temperature of 11 °C (52 °F) during the month of May, while the same has been recorded as −22 °C (−8 °F) at an altitude of 5,000 m (16,000 ft) on

5217-583: The Himalayas was under the influence of various Tibetan kingdoms across history. In the middle ages , the southern side came under the influence of various Rajput kings and later under the Mughal rule . Nepal was ruled by various kingdoms from both the Indian and Tibetan regions, until it was conquered by the Gurkha kingdom in the early 18th century. Most of the southern region came under the British influence in

5328-839: The Indian Himalayas. Pangong Lake spread across India and China is the highest saline lake in the world at an altitude of 4,350 m (14,270 ft) and amongst the largest in the region with a surface area of 700 km (270 sq mi). Spread across 189 km (73 sq mi), Wular Lake is amongst the largest fresh water lakes in Asia. Other large lakes include Tso Moriri , and Tso Kar in Ladakh , Nilnag , and Tarsar Lake , in Jammu and Kashmir , Gurudongmar , Chholhamu , and Tsomgo Lakes in Sikkim , Tilicho , Rara , Phoksundo , and Gokyo Lakes in Nepal. Some of

5439-487: The Sutlej River in the east to the Kali River in the west. The region comprises parts of Sivalik and Great Himalayas. At lower elevations below 2,400 m (7,900 ft), the region has a temperate climate and consists of permanent settlements. At elevations higher than 4,300 m (14,100 ft), permanent snow caps cover the Great Himalayas with the highest peaks being Nanda Devi at 7,817 m (25,646 ft) and Kamet at 7,756 m (25,446 ft). The region

5550-411: The Tethys ocean. The upliftment of the Himalayas occurred gradually and as the Great Himalayas became higher, they became a climatic barrier and blocked the winds, which resulted in lesser precipitation on the upper slopes. The lower slopes continued to be eroded by the rivers, which flowed in the gaps between the mountains and the folded lower Shivalik Hills and the Lesser Himalayas were formed due to

5661-419: The Tibetan Himalayas and the plateau beyond. It also played a role in the formation of Central Asian deserts such as the Taklamakan and Gobi . The monsoon is triggered by the different rates of heating and cooling between the Indian Ocean and Central Asia, which create large differences in the atmospheric pressure prevailing above each. As the Central Asian landmass heats up during the summer compared to

SECTION 50

#1732780704511

5772-534: The Western Himalayas. The high altitude mountainous areas are mostly barren or, at the most, sparsely sprinkled with stunted bushes. The Himalayas are home to various medicinal plants such as Abies pindrow used to treat bronchitis , Andrachne cordifolia used for snake bites , and Callicarpa arborea used for skin diseases . Nearly a fifth of the plant species in the Himalayas are used for medicinal purposes. Climate change , illegal deforestation , and introduction of non native species have had an effect on

5883-441: The alpine zone is present only on mountains, much of the landscape is rugged and broken, with rocky, snowcapped peaks, cliffs, and talus slopes, but also contains areas of gently rolling to almost flat topography. Averaging over many locations and local microclimates , the treeline rises 75 meters (245 ft) when moving 1 degree south from 70 to 50°N, and 130 meters (430 ft) per degree from 50 to 30°N. Between 30°N and 20°S,

5994-455: The animal species found in the region are unique and endemic or nearly endemic to the region. Other large animal species found in the Himalayas include Asiatic black bear , clouded leopard , and herbivores such as bharal , Himalayan tahr , takin , Himalayan serow , Himalayan musk deer , and Himalayan goral . Animals found at higher altitudes include brown bear , and the elusive snow leopard , which mainly feed on bharal. The red panda

6105-440: The average temperature in the warmest month and C the average of the coldest month, both in degrees Celsius (this would mean, for example, that if a particular location had an average temperature of −20 °C (−4 °F) in its coldest month, the warmest month would need to average 11 °C (52 °F) or higher for trees to be able to survive there). In 1947, Holdridge improved on these schemes, by defining biotemperature :

6216-425: The bend of the Indus River along the Pakistan-Afghanistan border region in the north-west to the Satlej river basin in India in the south-east. Most of the region lies in the Kashmir territory disputed between India and Pakistan with certain portions of the Indian state of Himachal Pradesh . The Indus forms the division between the Western Himalayas and the Karakoram range to the north. The Western Himalayas include

6327-514: The bogs and along the brooks. Alpine meadows form where sediments from the weathering of rocks has produced soils well-developed enough to support grasses and sedges. Non-flowering lichens cling to rocks and soil. Their enclosed algal cells can photosynthesize at any temperature above 0 °C (32 °F), and the outer fungal layers can absorb more than their own weight in water. The adaptations for survival of drying winds and cold may make tundra vegetation seem very hardy, but in some respects

6438-510: The cold winds from Central Asia , and plays a significant roles in influencing the monsoons . The vast size, varying altitude range, and complex topography of the Himalayas result in a wide range of climates, from humid and subtropical to cold and dry desert conditions. The mountains have profoundly shaped the cultures of South Asia and Tibet . Many Himalayan peaks are considered sacred across various Indian and Tibetan religions such as Hinduism , Buddhism , Jainism , and Bon . Hence,

6549-400: The condensation occurs at higher altitudes in the north, there is more precipitation in the Great Himalayas in the west during the winter rains and the precipitation reduces towards the east. In January, the Kumaon region receives about 3 in (76 mm) of rainfall compared to about 1 in (25 mm) in the Eastern Himalayas. The Himalayan region has a highly sensitive ecosystem and

6660-438: The construction of the White Pass and Yukon Route taking the Skagway - White Pass route instead of the Dyea-Chilkoot Pass route which effectively sealed the fate of both the Chilkoot Trail and the town of Dyea. The Taiya was also a key component of transportation during the gold rush days. During the winter the river would freeze over allowing significantly easier transportation (especially with sledges and pack animals ) than

6771-404: The dispersal of pre-existing species. Though tundra covers only a minority of the Earth's surface (17-20%), the biodiversity of plant species is important to human nutrition. Of the 20 plant species that make up 80% of human food, 7 of them (35%) originated in this region. Plants have adapted to the harsh alpine environment. Cushion plants , looking like ground-hugging clumps of moss, escape

SECTION 60

#1732780704511

6882-406: The downwarping of the intermediate lands. Minor streams ran between the faults within the mountains until they joined the major river systems in the plains. Intermediate valleys such as Kashmir and Kathmandu were formed from temporary lakes that were formed during pleistocene , which dried up later. The Himalayan region is made up of five geological zones– the Sub-Himalayan Zone bound by

6993-457: The eastern Assam Himalayas. The Nepal Himalayas forms the centre of the Himalayan curve and extend for 800 km (500 mi) between the Kali and Teesta Rivers . The Great Himalayas in the region form the highest part of the entire Himalayas and consist of many of the eight-thousanders including Everest, Kanchenjunga at 8,586 m (28,169 ft), and Makalu at 8,463 m (27,766 ft). These mountains host large glaciers that form

7104-495: The ecosystem. At higher altitudes, Eastern and Western Himalayan subalpine conifer forests consisting of various conifers occur. Chir pine is the dominant species which occurs at elevations from 800–900 m (2,600–3,000 ft). Other species include Deodar cedar , which grows at altitudes of 1,900–2,700 m (6,200–8,900 ft), blue pine and morinda spruce between 2,200–3,000 m (7,200–9,800 ft). At higher altitudes, alpine shrubs and meadows occur above

7215-417: The flora and fauna of the region. Changes might decrease the territory available for local wildlife and reduction in prey for the predators . This puts the animals in conflict with humans as humans might encroach animal territories and the animals might venture into human habitats for search of food, which might exacerbate the economic loss of the local population. The Himalayan nations are signatories of

7326-404: The flora of the range. The increase in temperature has resulted in shifting of various species to higher elevations, and early flowering and fruiting. Many of the animal species are from the tropics, which have adapted to the various conditions across the Himalayan range. Some of the species of the Eastern Himalayas are similar to those found in East and South East Asia , while the animals of

7437-405: The formation of the Tibetan plateau . During miocene (20 mya), the increasing collision between the plates resulted in the top layer of metamorphic rocks getting peeled, which moved southwards to form nappes with trenches in between. As the mountains received rainfall, the waters flowing down the mountains eroded and steepened the southern slopes. The silt deposited by these rivers and streams in

7548-488: The ground and consists mainly of perennial grasses , sedges , and forbs . Perennial herbs (including grasses, sedges, and low woody or semi-woody shrubs) dominate the alpine landscape; they have much more root and rhizome biomass than that of shoots, leaves, and flowers. The roots and rhizomes not only function in water and nutrient absorption but also play a very important role in over-winter carbohydrate storage. Annual plants are rare in this ecosystem and usually are only

7659-423: The ground. The cold climate of the alpine tundra is caused by adiabatic cooling of air, and is similar to polar climate . Alpine tundra occurs at high enough altitude at any latitude . Portions of montane grasslands and shrublands ecoregions worldwide include alpine tundra. Large regions of alpine tundra occur in the North American Cordillera and parts of the northern Appalachian Mountains in North America,

7770-771: The growing season in many areas. Precipitation occurs mainly as winter snow, but soil water availability is highly variable with season, location, and topography. For example, snowfields commonly accumulate on the lee sides of ridges while ridgelines may remain nearly snow free due to redistribution by wind. Some alpine habitats may be up to 70% snow free in winter. High winds are common in alpine ecosystems, and can cause significant soil erosion and be physically and physiologically detrimental to plants. Also, wind coupled with high solar radiation can promote extremely high rates of evaporation and transpiration . There have been several attempts at quantifying what constitutes an alpine climate. Climatologist Wladimir Köppen demonstrated

7881-405: The last ice age , and give rise to some of the world's major rivers such as the Indus , Ganges , and Tsangpo – Brahmaputra . Their combined drainage basin is home to nearly 600 million people including 52.8 million living in the vicinity of the Himalayas. The region is also home to many endorheic lakes. The Himalayas have a major impact on the climate of the Indian subcontinent. It blocks

7992-458: The livelihoods of the people in the Himalayas and the plains below. Despite its greater size, the Himalayas does not form a water divide across its span because of the multiple river systems that cut across the range. While the mountains were formed gradually, the rivers concurrently cut across deeper gorges ranging from 1,500–5,000 m (4,900–16,400 ft) in depth and 10–50 km (6.2–31.1 mi) in width. The actual water divide lies to

8103-590: The lower ranges on the southern slopes speak Indo-European languages. The inhabitants of the Western Himalayas include the Kashmiri people , who speak Kashmiri in the Vale of Kashmir and the Gujjar and Gaddi people , who speak Gujari and Gaddi respectively in the lower altitudes of Jammu and Himachal Pradesh in India. The last two are pastoral and nomadic people, who own flocks of cattle and migrate across

8214-586: The lowlands and grassland meadows in the mid altitudes. The composition and texture of the soils in the Himalayas also vary across regions. In the Eastern Himalayas , the wet soils has a high humus content conducive for growing tea . Podzolic soils occur in the eastern range of the Indus basin between the Indus and Shyok Rivers . The Ladakh region is generally dry with saline soil while fertile alluvial soils occur in select river valleys such as

8325-419: The main valley glaciers were 60–112 km (37–70 mi) long during the ice age. The glacier snowline (the altitude where accumulation and ablation of a glacier are balanced) was about 1,400–1,660 m (4,590–5,450 ft) lower than it is today. Thus, the climate would have been at least 7.0–8.3 °C (12.6–14.9 °F) colder than it is today. Since the late 20th century, scientists have reported

8436-477: The majority of the languages belonging to the first two categories. The Tibetan Himalayas are inhabited by Tibetan people , who speak Tibeto-Burman languages. The Great Himalayas are mostly inhabited by nomadic groups and tribes, with most of the population in Lesser Himalayas , and Shivalik Hills . People towards the Great Himalayas in the north parts mostly speak Tibeto-Burman, while populations in

8547-404: The margins. The mountains act as heat islands and heavier mountains absorb and retain more heat than the surroundings, and therefore influences the amount of heat needed to raise the temperature from the winter minimum to the summer maximum. However, soil temperatures mostly remain the same on both the sides of a mountain at altitudes higher than 4,500 m (14,800 ft). Temperatures in

8658-400: The mean annual temperature, where all temperatures below 0 °C are treated as 0 °C (because it makes no difference to plant life, being dormant). If the mean biotemperature is between 1.5 and 3 °C (34.7 and 37.4 °F), Holdridge quantifies the climate as alpine. Since the habitat of alpine vegetation is subject to intense radiation, wind, cold, snow, and ice, it grows close to

8769-530: The north of the Himalayas with rivers flowing down both the sides of the mountains. Some of the major river systems and their drainage system outdate the formation of the mountains itself. The water divide is formed by the Karakoram and Hindu Kush ranges on the west and the Ladakh Range on the east, separating the Indus system from Central Asia. On the east, Kailas and Nyenchen Tanglha Mountains separate

8880-678: The northwest, which extend into Central Asia . Its western anchor Nanga Parbat lies south of the northernmost bend of the Indus river in Pakistan-administered Kashmir and its eastern anchor Namcha Barwa lies to the west of the great eastern bend of the Yarlung Tsangpo River in Tibet Autonomous Region of China . The Himalayas occupies an area of 595,000 km (230,000 sq mi) across six countries – Afghanistan , Bhutan , China, India , Nepal , and Pakistan . The sovereignty of

8991-436: The number of glacial lakes , some of which may be prone to dangerous floods. The region is expected to encounter continued increase in average annual temperature and 81% of the region's permafrost is projected to be lost by the end of the century. The increased warming and melting of snow is projected to accelerate the regional river flows until 2060 after which it would decline due to reduction in ice caps and glacier mass. As

9102-403: The ocean below, the difference in pressure creates a thermal low . The moist air from the ocean is pushed inwards towards the low pressure system causing the monsoon winds. It results in precipitation along the slopes due to the orographic effect as the air rises along the mountains and condenses. The monsoon begins at the end of May in the eastern fringes of the range and moves upwards towards

9213-624: The overland trail. This was especially true when the Taiya went into a canyon between Canyon City and Pleasant Camp and the overland trail was especially difficult. Today the Taiya River is a centerpiece of the Klondike Gold Rush National Historical Park and the Chilkoot Trail it protects. It's also the recipient of rafting tours based out of Skagway and has an anadromous fish population that

9324-477: The past half a century. The average warm days and nights had also increased by 1.2 days and 1.7 nights per decade while the average cold days and nights had declined by 0.5 and 1 respectively. This has also prolonged the length of the growing season by 4.25 days per decade. The climate change might results in erratic rainfall, varying temperatures, and natural disasters like landslides , and floods . The increasing glacier melt had been followed by an increase in

9435-603: The precipitation is projected to increase concurrently, the annual river flows would be largely unaffected for the Eastern Himalayan rivers fed by monsoons, but would reduce the flows in the Western Himalayan rivers. Almost a billion people live on either side of the mountain and are prone to impact of the climate change. This includes the people who live in the mountains, who are more vulnerable due to temperature variations and other biota. Countries in

9546-469: The range in the Kashmir region is disputed among India, Pakistan, and China. It is bordered by the Karakoram and Hindu Kush ranges on the northwest, Tibetan Plateau in the north, and by the Indo-Gangetic Plain in the south. Its western anchor Nanga Parbat lies south of the northernmost bend of the Indus river and its eastern anchor Namcha Barwa lies to the west of the great bend of

9657-517: The range in the Kashmir region is disputed amongst India, Pakistan, and China. The range varies in width from 350 km (220 mi) in the north-west to 150 km (93 mi) in the south-east. The range has several peaks exceeding an elevation of 8,000 m (26,000 ft) including Mount Everest , the highest mountain on Earth at 8,848 m (29,029 ft). The Himalayas consist of four parallel mountain ranges from south to north:

9768-1034: The region  tropical and subtropical , temperate , coniferous , and grasslands . Tropical and subtropical broadleaf forests are mostly constricted to the high temperature and humid regions in Eastern and Central Himalayas , and pockets of Kashmir in the west. There are about 4,000 species of Angiosperms with major vegetation include Dipterocarpus , and Ceylon ironwood on porous soils at elevations below 2,400 m (7,900 ft) and oak , and Indian horse chestnut on lithosol between 1,100–1,700 m (3,600–5,600 ft). Himalayan subtropical pine forests with Himalayan screw pine trees occur above 4,000 m (13,000 ft) and Alder , and bamboo are found on terrains with higher gradient. Temperate forest occur at altitudes between 1,400–3,400 m (4,600–11,200 ft) while moving from south-east to north-west towards higher latitude. Eastern and Western Himalayan broadleaf forests consisting of sal trees dominate

9879-777: The region. More than 800 species of birds have been recorded with a large number of species restricted to the Eastern Himalayas. Amongst the bird species found include magpies such as black-rumped magpie and blue magpie , titmice , choughs , whistling thrushes , and redstarts . Raptors include bearded vulture , black-eared kite , and Himalayan griffon . Snow partridge and Cornish chough are found at altitudes above 5,700 m (18,700 ft). The Himalayan lakes also serve as breeding grounds for species such as black-necked crane and bar-headed goose . There are multiple species of reptiles including Japalura lizards, blind snakes , and insects such as butterflies . Several fresh water fish such as Glyptothorax are found in

9990-500: The region. As of 2022 , there are 575 protected areas established by the nations in the Himalayan-Hindu Kush region, which account for 40% of the land area and 8.5% of the global protected area. There are also four biodiversity hotspots , 12 ecoregions , 348 key biodiversity areas, and six UNESCO World Heritage Sites in the region. The Himalayan region with the associated Indo-Gangetic Plain and Tibetan plateau

10101-494: The same. The Himalayan region belongs to the Indomalayan realm . The flora and fauna of the Himalayas vary broadly across regions depending on the climate and geology. The Himalayas are home to multiple biodiversity hotspots, and is home to an estimated 35,000+ species of plants and 200+ species of animals. An average of 35 new species have been found every year since 1998. There are four types of vegetation found in

10212-593: The same. This has led to increased awareness on the impact of climate change, and adaptations such as change in crop cycles , introduction of drought resistant crops, and plantation of new trees. This has also led to the construction of more dams , canals , and other water structures, to prevent flooding and aid in agriculture. New plantations on barren lands to prevent landslides, and construction of fire lines made of litter and mud to prevent forest fires have been undertaken. However, lack of funding, awareness, access to technology, and government policy are barriers for

10323-413: The slopes and the plains below. The effect of Himalayas on the hydroclimate impacts millions in the plains as the variability in monsoon rainfall is the main factor behind wet and dry years. As the Himalayas force the monsoon winds to give up most of the moisture before ascending up, the winds became dry once its reaches the north of the mountains. This results in the dry and windy cold desert climate in

10434-451: The slopes based on seasons. Various ethnic people such as Ladakhi , Balti , and Dard live on the north of the Great Himalayas along the Indus basin in the Kashmir and Ladakh regions spread across India, Pakistan, and China. The Dard speak Dard , which is part of Indo-European languages, while the Balti and Lakadkhi people speak Balti , and Ladakhi , which are part of Tibeto-Burman. In

10545-417: The snow-melt of the glaciers. The lower altitude lakes are replenished by a combination of rains, underground springs, and streams. Large lakes in the Himalayan basin were formed in the holocene period, when water pooled in the faults and the water supply was subsequently cut off. There are more than 4500 high altitude lakes of which about 12 large lakes contribute to more than 75% of the total lake area in

10656-409: The source of various rivers of the Ganges - Brahmaputra river system. The high altitude regions are uninhabitable with few mountain passes inbetween that serve as crossovers with the human settlements in the lower valleys. The Assam Himalaya forms the eastern most sub-section that extends eastward for 720 km (450 mi) from the Indian state of Sikkim through Bhutan and north-east India past

10767-468: The strong winds blowing a few inches above them. Many flowering plants of the alpine tundra have dense hairs on stems and leaves to provide wind protection or red-colored pigments capable of converting the sun's light rays into heat. Some plants take two or more years to form flower buds, which survive the winter below the surface and then open and produce fruit with seeds in the few weeks of summer. In various areas of alpine tundra, woody plant encroachment

10878-525: The summits of several peaks in the region such as Gangkhar Puensum , Machapuchare , and Kailash have been off-limits to climbers. The name of the range is derived from the Sanskrit word Himālay ( हिमालय ) meaning 'abode of snow'. It is a combination of the words him ( हिम ) meaning 'frost/cold' and ālay ( आलय ) meaning 'dwelling/house'. The name of the range is mentioned as Himavat ( Sanskrit : हिमवत्) in older literature such as

10989-584: The super-continent Gondwana broke up nearly 180 mya, the Indo-Australian plate slowly drifted northwards towards Eurasia for 130-140 million years. The Indian Plate broke up with the Australian Plate about 100 mya. The Tethys ocean constricted as the Indian plate moved gradually upward. As both the plates were made of continental crusts , which were less denser than oceanic crusts , the increased compressive forces resulted in folding of

11100-506: The treeline is roughly constant, between 3,500 and 4,000 meters (11,500 and 13,100 ft). Alpine climate is the average weather ( climate ) for the alpine tundra. The climate becomes colder when reaching higher elevations —this characteristic is described by the lapse rate of air: air tends to get colder as it rises, since it expands. The dry adiabatic lapse rate is 10 °C per km (5.5 °F per 1000 ft) of elevation or altitude. Therefore, moving up 100 meters (330 ft) on

11211-612: The trees. The Eastern Himalayan alpine shrub and meadows extend between 3,200–4,200 m (10,500–13,800 ft) and the Western Himalayan alpine shrub and meadows occur at altitudes of 3,600–4,500 m (11,800–14,800 ft). Major vegetation include Juniperus , Rhododendron on rocky terrain facing the Sun, various flowering plants at high elevations, and mosses , and lichens in humid, shaded areas. Interspersed Grasslands occur at certain regions, with thorns and semi-desert vegetation at low precipitation areas in

11322-592: The tropical zone to extend farther north in South Asia than anywhere else in the world. The temperatures are more pronounced in the Brahmaputra valley in the eastern section as it lies at a lower latitude and due to the latent heat of the forced air from the Bay of Bengal which condenses before moving past the Namcha Barwa , the eastern anchor of the Himalayas. Due to this, the permanent snow line

11433-543: The trough between the Himalayas and the Deccan plateau formed the Indo-Gangetic Plain . About 0.6 mya in the pleistocene period, the Himalayas rose higher and became the highest mountains on Earth. In the northern Great Himalayas , new gneiss and granite formations emerged on crystalline rocks that gave rise to the higher peaks. The summit of Mount Everest is made of unmetamorphosed marine ordovician limestone with fossil trilobites , crinoids , and ostracods from

11544-689: The tundra is very fragile. Repeated footsteps often destroy tundra plants, allowing exposed soil to blow away; recovery may take hundreds of years. Because alpine tundra is located in various widely separated regions of the Earth, there is no animal species common to all areas of alpine tundra. Some animals of alpine tundra environments include the kea , marmot , mountain goat , bighorn sheep , chinchilla , Himalayan tahr , yak , snow leopard , and pika . Himalaya The Himalayas , or Himalaya ( / ˌ h ɪ m ə ˈ l eɪ . ə , h ɪ ˈ m ɑː l ə j ə / HIM -ə- LAY -ə, hih- MAH -lə-yə )

11655-593: The underlying rock bed. The thrust faults created between the folds resulted in granite and basalt rocks from the Earth's mantle protruding through the crust . During the paleogene period (about 50 mya), the Indian plate collided with the Eurasian plate after it completely closed the Tethys ocean gap. The Indian plate continued to subduct under the Eurasian plate over the next 30 million years that resulted in

11766-484: The valley is also experiencing post-glacial rebound ). There are a number of small glaciers and icefields that the river drains from the surrounding mountains, but for the most part, it's relatively a very small watershed for its size. The Taiya River delta is quite expansive and makes the adjacent portion of the Taiya Inlet very shallow. The Taiya River received its name when the Tlingit word Taiya became noted as

11877-460: The west in June and July. There is heavy precipitation in the east which reduces progressively towards the west as the air becomes drier. Cherrapunji in Eastern Himalayas is one of the wettest places on Earth with an annual precipitation of 428 in (10,900 mm). The average annual rainfall varies from 120 in (3,000 mm) in the Eastern Himalayas to about 120 in (3,000 mm) in

11988-481: The world's tallest peaks, including Everest. It is mainly composed of granite rocks. The Tibetan Himalayas (also known as Tethys ) form the northern most sub-range of the Himalayas in Tibet . Longitudinally, the range is broadly divided into three regions– western , central , and eastern . The Western Himalayas form the westernmost section of the range and extend for about 560 km (350 mi) from

12099-524: The youngest mountain ranges on Earth and is made up of uplifted sedimentary and metamorphic rocks. It was formed more than 10 mya due to the subduction of the Indian tectonic plate with the Eurasian Plate along the convergent boundary . Due to the continuous movement of the Indian plate, the Himalayas keep rising every year, making them geologically and seismically active. The mountains consist of large glaciers , which are remnants of

12210-475: Was mentioned as Himmaleh in western literature such as Emily Dickinson 's poetry and Henry David Thoreau 's essays. The Himalayas run as an arc for 2,400 km (1,500 mi) from west-northwest to east-southeast at the northern end of the Indian subcontinent , separating the Indo-Gangetic Plains from the Tibetan Plateau . It is bordered by the Karakoram and Hindu Kush ranges on

12321-534: Was originally used to denote the 320 km (200 mi) stretch from Haridwar to the Beas River . The range is about 16 km (9.9 mi) wide on average and the elevation ranges from 900–1,200 m (3,000–3,900 ft). It rises along the Indo-Gangetic Plain and is often separated from the higher northern sub-ranges by valleys. The eastern portion of the range is called Churia Range in Nepal. The Lower or Lesser Himalaya (also known as Himachal )

#510489