Climate Characteristics of Summer Precipitation Anomaly in Fushun
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Abstract:
The climate characteristics of summer precipitation anomaly in Funshun is investigated by using the monthly NCEP/NCAR reanalysis data and the monthly precipitation observations from the Zhangdang observation station from 1951 to 2012. Using the statistical methods and through the analysis of the characteristics of the atmospheric circulation, the climate characteristics of the summer precipitation anomaly in Fushun are discussed. The results show that summer precipitation in Fushun has obvious interannual scale periodic characteristics, and the more northern (the stronger) the western Pacific subtropical high north border (intensity) is, the stronger the rainfall intensity of the summer precipitation in Fushun area is. In the strong (weak) rainfall years in Fushun, in the 500 hPa height field, Fushun is at the front of the low vortex (high pressure) area; in the 850 hPa wind field, Fushun is controlled by the southwest (north) airflow; in the sea level pressure field, Fushun is located in the front of the bottom of the Mongolia cyclone (anticyclone); in the specific humidity field， Fushun is located in the positive (negative) specific humidity anomaly zone. In strong precipitation years, low temperature anomaly center behind the 500 hPa height field lowvalue centers, conducive to the development of the upper trough, is advantageous to keep strengthening the precipitation; while in weak precipitation years, low temperature anomaly center matching with the 500 hPa height field low center has no obvious influence on the development of upper troughs and ridges.
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Supported by:Beijing E-Tiller Technology Development Co., Ltd.
Supported by:Beijing E-Tiller Technology Development Co., Ltd.