Relationship between the Snow Cover Day and Monsoon Index in Tibetan Plateau
Updatetime：2010-11-26From：
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The researcher Xu Lijiao, Li Dongliang, Hu Zeyong recently discovered :the basic features and trends of snow cover days over 45 years and the monsoon variations of nearly 60 years, and the further relation between monsoon index and snow cover days in Tibetan Plateau were analyzed using the EOF analysis, the running t\|test and correlation analysis methods, snow cover day data (from 1960 to 2004) obtained from 50 weather stations in Tibetan Plateau region, the monthly NCEP/NCAR reanalysis gridded data 2.5°×2.5° from January 1948 to February 2009, the daily mean 600 hPa height reanalysis gridded data 2.5°×2.5° from January 1, 1979 to December 31, 2009, and the surface heating field intensity data of Tibetan Plateau. The results show that when surface heating field intensity in Tibetan Plateau was strong, the monsoon in midwinter was weak, and the surface heating field intensity was weak in the following spring.The increase (or decrease) of summer monsoon in Tibetan Plateau would result in an increase (or a decrease) of the snow cover days in Tanggula Mountain but a decrease (or an increase) in the Bangoin and north\|eastern Qinghai; the increased (or decreased) winter monsoon in Tibetan Plateau would cause an increase (or decrease) of snowcover days in Himalaya mountains and Tanggula Mountain but a decrease (or increase) in the southern Tibet.
issued by <<Plateau Meteorology>>
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