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36-609: The Xun River flows from west to east roughly along the Tropic of Cancer . 23°28′5″N 111°18′20″E  /  23.46806°N 111.30556°E  / 23.46806; 111.30556 This article related to a river in China is a stub . You can help Misplaced Pages by expanding it . Tropic of Cancer 23°26′12.5″N 0°0′0″W  /  23.436806°N -0.00000°E  / 23.436806; -0.00000  ( Prime Meridian ) The Tropic of Cancer , also known as

72-519: A millennium . This wobble means that the Tropic of Cancer is currently drifting southward at a rate of almost half an arcsecond (0.468″) of latitude, or 15 m (49 ft), per year. The circle's position was at exactly 23° 27′N in 1917 and will be at 23° 26'N in 2045. The distance between the Antarctic Circle and the Tropic of Cancer is essentially constant as they move in tandem. This

108-474: A more even rhythm of seasonal rainfall. Tropical lows and weakening tropical storms often contribute to seasonal rainfall in most humid subtropical climates. In the cool season (winter) the subtropical highs retreat, and the humid subtropics are more influenced by the westerlies and the fronts and storms that move with them. The Subtropical highland climate is a climate variant often grouped together with oceanic climates found in some mountainous areas of either

144-530: Is based on an assumption of a constant equator, but the precise location of the equator is not truly fixed. See: equator , axial tilt and circles of latitude for additional details. Download coordinates as: North of the tropic are the subtropics and the North Temperate Zone . The equivalent line of latitude south of the Equator is called the Tropic of Capricorn , and the region between

180-427: Is generally in areas adjacent to powerful cold ocean currents. Examples of this climate are the coastal areas of Southern Africa and the west coast of South America . The humid subtropical climate is often on the western side of the subtropical high. Here, unstable tropical airmasses in summer bring convective overturning and frequent tropical downpours, and summer is normally the season of peak annual rainfall. In

216-418: Is lower. This definition, though restricted to dry regions, is almost similar to Holdridge's. Heating of the earth by the sun near the equator leads to large amounts of upward motion and convection winds along the monsoon trough or Intertropical Convergence Zone . The upper-level divergence over the near-equatorial trough leads to air rising and moving away from the equator aloft. As the air moves towards

252-561: Is often concentrated in the warmest months, for example Southeast China and the Southeastern United States , and dry summer or Mediterranean climate ( Köppen climate classification : Csa/Csb), where seasonal rainfall is concentrated in the cooler months, such as the Mediterranean Basin or Southern California . Subtropical climates can also occur at high elevations within the tropics , such as in

288-468: Is subdivided into seven smaller areas. According to the E. Neef climate classification, the subtropical zone is divided into two parts: rainy winters of the west sides and eastern subtropical climate . According to the Wilhelm Lauer & Peter Frankenberg climate classification, the subtropical zone is divided into three parts: high-continental , continental , and maritime . According to

324-460: Is the Trewartha climate classification , which defines a subtropical region as one that has at least eight months with a mean temperature greater than 10 °C (50.0 °F) and at least one month with a mean temperature under 18 °C (64.4 °F). German climatologists Carl Troll and Karlheinz Paffen defined warm temperate zones as plain and hilly lands having an average temperature of

360-628: The Equator . Its Southern Hemisphere counterpart, marking the most southerly position at which the Sun can be seen directly overhead, is the Tropic of Capricorn . These tropics are two of the five major circles of latitude that mark maps of Earth, the others being the Arctic and Antarctic circles and the Equator . The positions of these two circles of latitude (relative to the Equator) are dictated by

396-787: The Northern Tropic , is the Earth 's northernmost circle of latitude where the Sun can be seen directly overhead . This occurs on the June solstice , when the Northern Hemisphere is tilted toward the Sun to its maximum extent. It also reaches 90 degrees below the horizon at solar midnight on the December Solstice . Using a continuously updated formula, the circle is currently 23°26′09.8″ (or 23.43605°) north of

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432-504: The Tropic of Cancer and Tropic of Capricorn , at latitudes 23°26′09.8″ (or 23.43605°) north and south, respectively. According to the American Meteorological Society, the poleward fringe of the subtropics is at latitudes approximately 35° north and south , respectively. Several methods have been used to define the subtropical climate depending on the climate system used. The most well known

468-563: The Cwb classification have significant monsoon influence, usually having dry winters and wet summers. The Mediterranean climate regime resembles the climate of the lands in the Mediterranean Basin , parts of lower West Coast of the United States, parts of Western and South Australia , in southwestern South Africa and in parts of central Chile . The climate is characterized by hot dry summers and cooler winters with rainfall. In Europe,

504-498: The Siegmund/Frankenberg climate classification, subtropical is one of six climate zones in the world. Leslie Holdridge defined the subtropical climates as having a mean annual biotemperature between the frost line or critical temperature line, 16 °C to 18 °C (depending on locations in the world), and 24 °C. The frost line separates the warm temperate region from the subtropical region. It represents

540-463: The Tropic of Cancer experience two distinct seasons: an extremely hot summer with temperatures often reaching 45 °C (113 °F) and a warm winter with maxima around 22 °C (72 °F). Much land on or near the Tropic of Cancer is part of the Sahara Desert , while to the east, the climate is torrid monsoonal with a short wet season from June to September, and very little rainfall for

576-563: The annuals or as perennial plants that can withstand the cold. The 16 °C–18 °C segment is often "simplified" as 17 °C ( 2 ( log 2 ⁡ 12   +   0.5 )   ∘ C ≈ 16.97   ∘ C ) {\textstyle {\bigl (}2^{(\log _{2}12\ +\ 0.5)}\ ^{\circ }\!\mathrm {C} \approx 16.97\ ^{\circ }\!\mathrm {C} {\bigr )}} . The Holdridge subtropical climates straddle more or less

612-539: The coastal areas of the lower west coast of the United States. These climates do not routinely see hard freezes or snow due to winter on average being above freezing, which allows plants such as palms and citrus to flourish. As one moves toward the tropical side the slight winter cool season disappears, while at the poleward threshold of the subtropics the winters become cooler. Some crops which have been traditionally farmed in tropical climates, such as mango , litchi , avocado and aloe vera , are also cultivated in

648-540: The coldest month between 2 °C (35.6 °F) and 13 °C (55.4 °F) in the Northern Hemisphere and between 6 °C (42.8 °F) and 13 °C (55.4 °F) in the Southern Hemisphere , excluding oceanic and continental climates . According to the Troll-Paffen climate classification, there generally exists one large subtropical zone named the warm-temperate subtropical zone, which

684-573: The deep southeastern United States , southeastern South America , southeastern Southern Africa , northcentral Southern Europe , and southern and southwestern Eastern Europe . In most humid subtropical climates, summer is the wettest season. In summer, the subtropical high pressure cells provide a sultry southernly flow of tropical air with high dew points, and frequent (but brief) convective showers are common. With decreasing latitude most humid subtropical climates typically have drier winters and wetter summers, however some sectors with this climate see

720-694: The distance is set to a rounded value of at least 36,770 kilometres (22,850 mi). Subtropics The subtropical zones or subtropics are geographical and climate zones to the north and south of the tropics . Geographically part of the temperate zones of both hemispheres, they cover the middle latitudes from 23°26′09.8″ (or 23.43605°) to approximately 35° north and south. The horse latitudes lie within this range. Subtropical climates are often characterized by hot summers and mild winters with infrequent frost. Most subtropical climates fall into two basic types: humid subtropical ( Köppen climate classification : Cfa/Cwa), where rainfall

756-410: The dividing line between two major physiological groups of evolved plants. Most of the plants are sensitive to low temperatures on the warmer side of the line. They can be killed back by frosts as they have not evolved to withstand periods of cold. On the colder temperate side of the line, the total flora is adapted to survive periods of variable lengths of low temperatures, whether as seeds in the case of

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792-500: The fact that the Sun appears to "turn back" at the solstices. The Tropic of Cancer's position is not fixed, but constantly changes because of a slight wobble in the Earth's longitudinal alignment relative to the ecliptic , the plane in which the Earth orbits around the Sun. Earth's axial tilt varies over a 41,000-year period from about 22.1 to 24.5 degrees, and as of 2000 is about 23.4 degrees, which will continue to remain valid for about

828-431: The following 17 countries (including two disputed territories) and 8 water bodies, starting at the prime meridian and heading eastward: The climate at the Tropic of Cancer is generally hot and dry, except for cooler highland regions in China, marine environments such as Hawaii, and easterly coastal areas, where orographic rainfall can be very heavy, in some places reaching 4 metres (160 in) annually. Most regions on

864-459: The mid-latitudes, it cools, gets denser and sinks, which leads to subsidence near the 30th parallel of both hemispheres. This circulation is known as the Hadley cell and leads to the formation of the subtropical ridge . Many of the world's deserts are caused by these climatological high-pressure areas , within the subtropics. This regime is known as a semiarid / arid subtropical climate, which

900-705: The rest of the year. The highest mountain on or adjacent to the Tropic of Cancer is Yu Shan in Taiwan . It had glaciers descending as low as 2,800 metres (9,190 ft) during the Last Glacial Maximum . At present glaciers still exist around the Tropic. The nearest currently surviving are the Minyong and Baishui in the Himalayas to the north and on Iztaccíhuatl in Mexico to the south. According to

936-503: The rules of the Fédération Aéronautique Internationale , for a flight to compete for a round-the-world speed record, it must cover a distance no less than the length of the Tropic of Cancer, cross all meridians , and end on the same airfield where it started. The length of the Tropic of Cancer is 36,788 km (22,859 mi): For an ordinary circumnavigation the rules are somewhat relaxed and

972-462: The southeast sides of continents) have hot and wet summers with frequent (but brief) convective rainfall ( tropical cyclones can also contribute to annual rainfall). Areas bordering cool oceans (typically on the southwest sides of continents) are prone to fog, aridity, and dry summers. Plants such as palms , citrus , mango , pistachio , lychee , and avocado are grown in the subtropics. The tropics have been historically defined as lying between

1008-663: The southern end of the Mexican Plateau and in Da Lat of the Vietnamese Central Highlands. The six climate classifications use the term to help define the various temperature and precipitation regimes for planet Earth . A great portion of the world's deserts are within the subtropics, as this is where the semi-permanent subtropical anticyclone resides (typically inland on the southwest sides of continents). Areas bordering warm oceans (typically on

1044-469: The subtropics or tropics. It has characteristically mild temperatures year-round, featuring the four seasons in the subtropics and no marked seasons in the tropics, the latter usually remaining mild to cool through most of the year. Subtropical highland climates under the Cfb classification usually have rainfall spread relatively evenly in all months of the year similar to most oceanic climates while climates under

1080-481: The subtropics. Japan receives over half of its rainfall from typhoons. The Mediterranean climate is a subtropical climate, usually found on the western side of continents, with a wet season in winter and a dry season in the summer. Regions with this type of climate include the rim lands of the Mediterranean Sea , southwestern Australia , parts of the west coast of South America around Santiago and

1116-646: The subtropics. Pest control of the crops is easier than in the tropics, due to the cooler winters. Tree ferns ( pteridophytes ) are grown in subtropical areas, as are dracaena and yucca , and trees in the Taxaceae . Apple , pear and pomegranate also grow well in the subtropics. The humid subtropical climate is a subtropical climate type characterized by hot, humid summers and generally mild winters. This climate can be found in northern Middle East , northern South Asia , northern Indochina , eastern Australia , southern and southeastern China , southern Japan ,

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1152-402: The tilt of Earth's axis of rotation relative to the plane of its orbit , and since the tilt changes, the location of these two circles also changes. In geopolitics , it is known for being the southern limitation on the mutual defence obligation of NATO , as member states of NATO are not obligated to come to the defence of territory south of the Tropic of Cancer. When this line of latitude

1188-401: The two, centered on the Equator, is the tropics . In the year 2000, more than half of the world's population lived north of the Tropic of Cancer. On the Tropic of Cancer there are approximately 13 hours, 35 minutes of daylight during the summer solstice. During the winter solstice, there are 10 hours, 41 minutes of daylight. Using 23°26'N for the Tropic of Cancer, the tropic passes through

1224-508: The warmest subtropical climates and the less warm tropical climates as defined by the Köppen-Geiger or Trewartha climate classifications. However Wladimir Köppen has distinguished the hot or subtropical and tropical (semi-)arid climates ( BWh or BSh ) having an average annual temperature greater than or equal to 18 °C (64.4 °F) from the cold or temperate (semi-)arid climates ( BWk or BSk ) whose annual temperature average

1260-417: The winter (dry season) the monsoon retreats, and the drier trade winds bring more stable airmass and often dry weather, and frequent sunny skies. Areas that have this type of subtropical climate include Australia, Southeast Asia, and parts of South America. In areas bounded by warm ocean like the southeastern United States and East Asia, tropical cyclones can contribute significantly to local rainfall within

1296-530: Was named in the last centuries BCE , the Sun was in the constellation Cancer ( Latin : Crab ) at the June solstice (90° ecliptic longitude ). Due to the precession of the equinoxes , this is no longer the case; today the Sun is in constellation Taurus at the June solstice. The word "tropic" itself comes from the Greek "trope (τροπή)", meaning turn (change of direction or circumstance), inclination, referring to

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