Winter Rainstorms and Its Circulation Characteristics in Fujian Province
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Abstract:
The rainstorm data of 1960 to 2008 from 66 weather observations in Fujian province are used to analyze the spatial and temporal distribution and main influencing synoptic systems of winter rainstorms. The results show that winter rainstorms appear mainly in the western Fujian. The main influencing systems include the eastward moving south westerly trough, steady shear line, and southward moving cold air; the physical conditions for winter rainstorm formation are correlated with abundant vapor, atmospheric instability, and convergent upward movement, but the stratification of the atmosphere is more stable in winter than those in flood season; the atmosphere circulation at 500 hPa is closely related to seasurface temperature anomalies around the equatorial middleeastern Pacific, which may induced the abnormity of winter rainstorms over Fujian through influencing the atmosphere circulation.
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Supported by:Beijing E-Tiller Technology Development Co., Ltd.
Supported by:Beijing E-Tiller Technology Development Co., Ltd.