Spatial Characteristics of Anomalous Circulation inCold/Warm Years in Spring in Northeast China
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Abstract:
By using the global temperature, height, and wind data of 40 years from 1960 to 2000, the anomalous features of global circulation in spring in cold/warm years in Northeast China were analyzed. It is concluded: in cold spring years, radial circulation prevailed in the troposphere; the Mongolia high and the Aleutian low strengthened at the lower-level, and cold air systems were more active; above the mid-level, there was a blocking high or warm ridge in the high-latitude region. The variation of the East-Asia Trough Index has a close relation with spring temperature. The variation of vertical temperature distribution extended up to the tropopause in cold/warm years. In cold spring year over Northeast China, north winds prevailed and the westerly was relatively strong; a negative temperature anomaly center extended from surface to tropopause, while a positive zonal wind area lay across Northeast China. In warm spring year, vice versa.
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Clc Number:
P423.3 F837.121
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Supported by:Beijing E-Tiller Technology Development Co., Ltd.
Supported by:Beijing E-Tiller Technology Development Co., Ltd.