The Koppen Climate Classification System determines the World Climatic Regions entirely based on the annual and monthly averages of temperature and precipitation. There are several factors which manipulate the World Climatic Regions which are listed below:
- Pattern of prevailing winds.
- Distribution of land and sea.
- Distribution of mountain barriers.
- Position of high and low pressure zones.
- Heat exchange from ocean currents.
- Air mass influences.
- Latitude and its influence on solar radiation received.
The patterns of natural vegetation and the types of soil types completely depend on the climatic condition which is entirely a geographic feature.
With an average temperatures exceeding more than 18º Celsius, Tropical moist climate moves towards northward and southward from the equator. Dry climate is usually about evaporation and which tends to be near to 20º - 35º North and South of the equator. Dry climate is more frequent in large continental regions of the mid-latitudes where most of the regions are engulfed by mountains.
The four main World Climatic Regions are listed below:
- Tropical climate
- Dry climate
- Moist Subtropical Mid-Latitude Climates
- Continental climate
- Polar climate
Moist Subtropical Mid-Latitude Climates usually experience warm and humid summers along with mild winters. With about 30 to 50º of latitude along the eastern and western borders of most continents, this climate is usually marked with mid-latitude cyclone. Convective thunderstorms are quite frequent during summer months. The climate is categorically divided into: Humid subtropical; Mediterranean; and Marine.
Moist Continental Mid-latitude Climates is usually determined with cool summers and cold winters. Winters are accompanied with snowstorms, strong winds, which usually emerges from Continental Polar or Arctic air masses. Polar climates are cold all throughout and generally warm going below 10º Celsius. Polar climates are quite frequent in areas like northern coastal areas of North America, Europe, Asia, and on the landmasses of Greenland and Antarctica.