Climate types

ETP annual (mm)

Climate Subtypes

(ETP in the summer /ETP annual) *100

$\text{<msup> A <mo> ′ </mo> </msup>}$ → megathermic

ETP ≥ 1140

$\text{<msup> a <mo> ′ </mo> </msup>}$

Less than 48.0%

${\text{<msup> B <mo> ′ </mo> </msup>}}_{\text{4}}$ →mesothermic

1140 >ETP ≥ 997

${\text{<msup> b <mo> ′ </mo> </msup>}}_{\text{4}}$

between 48.0% and less than 51.9%

${\text{<msup> B <mo> ′ </mo> </msup>}}_{\text{3}}$ →mesothermal

997 > ETP ≥ 885

${\text{<msup> b <mo> ′ </mo> </msup>}}_{\text{3}}$

between 51.9% and less than56.3%

${\text{<msup> B <mo> ′ </mo> </msup>}}_{\text{2}}$ →mesothermal

885 > ETP ≥ 712

${\text{<msup> b <mo> ′ </mo> </msup>}}_{\text{2}}$

between 56.3% and less than 61.6%

${\text{<msup> B <mo> ′ </mo> </msup>}}_{\text{1}}$ → mesothermal

712 > ETP ≥ 570

${\text{<msup> b <mo> ′ </mo> </msup>}}_{\text{1}}$

between 61.6% and less than 68.0%

${\text{<msup> C <mo> ′ </mo> </msup>}}_{\text{2}}$ → microthermal

570 > ETP ≥ 427

${\text{<msup> c <mo> ′ </mo> </msup>}}_2$

between 68.0% and less than 76.3%

${\text{<msup> C <mo> ′ </mo> </msup>}}_{\text{1}}$ → microthermal

427 > ETP ≥ 287

${\text{<msup> c <mo> ′ </mo> </msup>}}_{\text{1}}$

between 76.3% and less than 88.0%

$\text{<msup> D <mo> ′ </mo> </msup>}$ → tundra

287 > ETP ≥ 142

$\text{<msup> d <mo> ′ </mo> </msup>}$

equal or more than 88.0%

$\text{<msup> E <mo> ′ </mo> </msup>}$ → perpetual ice

ETP < 142