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Numerical Simulation of the Influences of West-Central Qinghai-Xizang Plateau on East Asia Seasonal Transition

WANG Lan\|ning,\ ZHENG Qing\|lin,\ SONG Qing\|li(Chinese Academy of Meteorological Sciences, Beijing 100081, China)\ \   
By employing a modified CCM3\|RegCM2 nested model system which is developed on the basis of NCAR CCM3 and RegCM2, the surface influences of the Midwest area of Qinghai\|Xizang Plateau on the seasonal transition in Eastern Asia were studied. The results show that when the vegetation of the West\|central Plateau is damaged, the mid\|latitude zonal flow and Eastern Asia trough are weaken due to the fact that the temperature of the most part of East Asia to the north of 30°N and height of East Asia coastal belt are strengthened by virtue of surface albedo and temperature of the West\|central Qinghai\|Xizang Plateau increasing, all of these imply that the seasonal transition in Eastern Asia will be somewhat period in advance.
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