Abstract

An observation study is carried out on snow mass amount estimate in northwestern China by using microwave derived snow depth charts employing data from SMMR in conjunction with daily snow depth, density and snow cover duration records for 46 ground climate stations. Spatial patterns, seasonal cycle, and interannual variation of snow cover an discussed. Results show that snow cover is the second largest water supply over the arid northwestern China, and unlike most other areas in the world, northwestern China did not experience any decrease in snow cover since 1987. Secular trends reveal syetematic increase in snow mass and durations. Analysis of snow cover-climate relationship indicates that gradual hcmase in snow cover is primarily in response to increase in snow season precipitation.

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