Update of global maps of Alisov’s climate classification

Progress in Earth and Planetary Science

Table 1 Nine climatic zones

Symbol	Climatic zones	Winter / Summer	Behavior
TT	Tropical	Tropical / Tropical	stable
ST	Quasi-tropical	Subtropical / Tropical	one-class change
SS	Subtropical	Subtropical / Subtropical	stable
PS	Temperate	Polar / Subtropical	one-class change
PP	Polar	Polar / Polar	stable
AP	Subarctic	Arctic / Polar	one-class change
AA	Arctic /Antarctic	Arctic / Arctic	stable
AS	Subarctic	Arctic / Subtropical	two-class change
PT	Temperate	Polar / Tropical	two-class change

Nine climatic zones based on the dominant air mass zones during the winter and summer half-years in each hemisphere and their relationship with the behavior of the air mass zones