Classification of Köppen

Wladimir Peter Köppen developed in the years 1920 a system of classification of the Climat S only based on the Précipitation S and the Température S. a climate is thus located by a code of two or three letters:

1st letter: type of climate

In the broad outlines, the world climates are spread out of has to E, while going from the equator to the poles.

2nd letter: pluviometric mode

The following categories are thus obtained:

Af: wet tropical climate
Aw: climate of tropical savanna
Am: climate of monsoon
BS: climate of steppe
BW: desert climate
cf: wet moderate climate without season dries
CW: wet moderate climate with dry winter
Cs: wet moderate climate with dry summer (Mediterranean climate)
Df: cold moderate climate without season dries
Dw: cold moderate climate with dry winter
AND: climate of tundra
EFF: climate of ice cap
EM: maritime climate subarctic

3rd letter: temperature variations

To refine the types B, C and D, a third letter specifies the temperature variations:

Examples

the the Sahara, or the desert of Arabia, are of type BWh
the equatorial zone is of type Af
the France of north east of the type Cfb
the Amazonia is of type Aw
the center of the Greenland is of type EFF
the Siberia is of type Dfc

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