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 ☌ (64.4 ☏) from the cold or temperate (semi-)arid climates ( BWk or BSk) whose annual temperature average is lower. The Holdridge subtropical climates straddle more or less the warmest subtropical climates and the less warm tropical climates as defined by the Köppen-Geiger or Trewartha climate classifications. On the colder temperate side of the line, the total flora is adapted to survive periods of variable length of low temperatures, whether as seeds in the case of the annuals or as perennial plants which can withstand the cold. They can be killed back by frosts as they have not evolved to withstand periods of cold. On the warmer side of the line, the majority of the plants are sensitive to low temperatures. It represents the dividing line between two major physiological groups of evolved plants. The frost line separates the warm temperate region from the subtropical region. Leslie Holdridge defined the subtropical climates as having a mean annual biotemperature between the frost line or critical temperature line, 16 ☌ to 18 ☌ (depending on locations in the world) and 24 ☌. Under both classifications, at least one month must average below 18 ☌ (64.4 ☏) or the climate is considered tropical. The Köppen climate classification instead classifies the warmest month above 22 ☌ (71.6 ☏) and the coldest above 0 ☌ (32 ☏) or −3 ☌ (26.6 ☏) depending on preference. Using the Trewartha climate classification eight or more months of the year within the subtropics have an average temperature at or above 10 ☌ (50 ☏). Six climate classifications utilise the term to help define the various temperature and precipitation regions for the planet Earth. These regions can also exist beyond 45 degrees poleward due to maritime influences on the NW European and Argentinian coasts, according to Trewartha. Subtropical climate regions can exist at high elevations within the tropics, such as across the Mexican Plateau and the Ethiopian Highlands and in Da Lat of the Vietnamese Central Highlands. The subtropics are geographic and climate zones located roughly between the Tropic of Cancer and Tropic of Capricorn and the 40th parallel in both hemispheres. This list of locations with a subtropical climate specifically lists locations considered within the subtropics. Areas of the world with subtropical climates
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |