Climatic Characteristics of Rainstorm in Flood Season in Beijing
Abstract: Using the data of precipitation, circulation parameters and historic synoptic chart at Beijing station, the climatic characteristics and the classification of weather situation in main flood season at Beijing station in the last 62 years were analysed. The conclusion was expressed as follow. 1) In flood season, the variation trend of accumulated rainstorm rainfall is as same as accumulated rainfall, showing a decreasing trend, and the rainstorm contribution rate shows a wave change. 2) In former flood season, the proportion of rainstorm in July and August shows some periodic changes, and the storm period may be coming in the next 10 years. 3) In flood season, the wavelet power spectrum of storm frequency is a 2 - 3-year period and a qusi-5-year period. According to it, the storm frequency will be on the low side in 2013. 4) In the years of more storms, the Western Pacific Subtropic High Area is larger; the strength is stronger; the ridge is more north and west; and sunspot is in an inactive period. Instead, in the years of fewer storms, the Western Pacific Subtropic High Area is smaller; the strength is weaker; the ridge is more north and west; the temperature is lower; and sunspot is in an active period.
文章引用: 郑红莲 , 杨 弘 , 严 军 (2014) 北京汛期暴雨气候特征分析。 气候变化研究快报， 3， 25-30. doi: 10.12677/CCRL.2014.31005
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