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The humid subtropical zone of the US South according to Trewartha is coloured yellow-green on this map: If using the Köppen climate classification with the 0 °C coldest-month isotherm, the subtropics extend from Martha's Vineyard, extreme SW Rhode Island, and most of Long Island to central Florida in the eastern states, include the southern ...
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. [10] The frost line separates the warm temperate region from the subtropical region.
A humid subtropical climate is a temperate climate type characterized by long and hot summers, and cool to mild winters. These climates normally lie on the southeast side of all continents (except Antarctica), generally between latitudes 25° and 40° and are located poleward from adjacent tropical climates, and equatorward from either humid continental (in North America and Asia) or oceanic ...
As Köppen designed the system based on his experience as a botanist, his main climate groups are based on the types of vegetation occurring in a given climate classification region. In addition to identifying climates, the system can be used to analyze ecosystem conditions and identify the main types of vegetation within climates.
Many tropical areas have both a dry and a wet season. The wet season, rainy season or green season is the time of year, ranging from one or more months when most of the average annual rainfall in a region falls. [9] Areas with wet seasons are disseminated across portions of the tropics and subtropics, some even in temperate regions. [10]
The region from the southern Plains, to the lower Midwest, eastward to parts of the Upper South, and the central East Coast (the New York City/coastal Connecticut region southward to Virginia) has a humid temperate climate, transitional between the humid continental and humid subtropical climate zones, becoming semi-arid in the western plains ...
The tropical and subtropical grasslands, savannas, and shrublands are characterized by rainfall levels between 90–150 centimetres (35–59 in) per year. [1] Rainfall can be highly seasonal, with the entire year's rainfall sometimes occurring within a couple of weeks. African savannas occur between forest or woodland regions and grassland regions.
Today, the most commonly used climate map is the Köppen climate classification, developed by Russian climatologist of German descent and amateur botanist Wladimir Köppen (1846–1940), which divides the world into five major climate regions, based on average annual precipitation, average monthly precipitation, and average monthly temperature.