Table 1. Value assignment of the geographic climate variables.

Geographic climate index	Variable	Assignment
Annual precipitation, AP	0 mm≤AP<200 mm	1
	200 mm≤AP<500 mm	2
	500 mm≤AP<1000 mm	3
	1000 mm≤AP<2000 mm	4
	2000 mm≤AP	5
Annual atmospheric temperature, AAT	30°C≤AAT	6
	20°C≤AAT<30°C	5
	10°C≤AAT<20°C	4
	0°C≤AAT<10°C	3
	−10°C≤AAT<0°C	2
	−20°C≤AAT<−10°C	1
Temperature climate zone, TCZ	Frigid zone	1
	Subfrigid zone	2
	Temperate zone	3
	Subtropical zone	4
	Tropical zone	5
Geography climatic zone, GCZ	Continental climate	1
	Transitional climate	2
	Oceanic climate	3
Geography latitude, GL	0°≤GL<25°	3
	25°≤GL<50°	2
	50°≤GL<75°	1