Interdecadal Changes in the Freeze Depth and Period of Frozen Soil on the Three Rivers Source Region in China from 1960 to 2014

Table 4

The annual trends in air temperature, thawing index, maximum snow depth, annual precipitation, spring precipitation, summer precipitation, and autumn precipitation for three different time periods on the TRSR. Significance levels: ; .

	1960–2014	1985–2014	2000–2014
Air temperature (°C /decade)	0.30	0.62	0.61
Thawing index (°C·month/decade)	1.56	3.60	3.83
Maximum snow depth (cm/decade)	−0.05	0.54	0.57
Annual precipitation (mm/decade)	5.12	19.38	62.82
Spring precipitation (mm/decade)	1.64	3.90	17.43
Summer precipitation (mm/decade)	1.35	10.24	39.50
Autumn precipitation (mm/decade)	0.00	5.65	3.53