吴富山,王魁山,符长锋. 1999. 河南省汛期降水的天气季节特征[J]. 气象学报, 57(3):367-375, doi:10.11676/qxxb1999.035
河南省汛期降水的天气季节特征
THE SYNOPTIC SEASONAL CHARACTERISTICS OF RAINFALL IN HENAN PROVINCE DURING THE RAINY SEASON
投稿时间:1997-03-12  修订日期:1997-12-01
DOI:10.11676/qxxb1999.035
中文关键词:  天气季节  EOF分析  汛期降水特征
英文关键词:Synoptic season  EOF analysis  Precipitaion characteristics in flood season
基金项目:
作者单位
吴富山 河南省气象台, 郑州, 450003 
王魁山 河南气象编辑部, 郑州, 450003 
符长锋 河南省气象科学研究所, 郑州, 450003 
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中文摘要:
      通过多年汛期逐日降水量场的EOF分析,探讨了河南省汛期降水的天气季节特征。河南省主汛期出现在江淮梅汛之后,称暑汛较合适。暑汛期降水出现明显的南北与东西方向上的反相振荡;尤其是从小暑到大暑,季风雨带从沙河以南,北跃到黄河沿岸及其以北地区,是东亚季风重要的气候特征,表明梅雨结束后,中国东部的主要雨带不是一跃而至黄河以北,而是阶段性地逐次向北跳跃的。对暑汛降水气候的分析研究,有助于加深对东亚季风活动的认识。
英文摘要:
      The synoptic seasonal characteristics of rainfall are studied by means of the analysis of EOF (Empirical Orthogonal Fuction) of the daily amounts of precipitation field in Henan Province during the rainy season, usually known as the flood season. The precipitation in the flood season is possessed of sameness in Henan which is hinterland of Huanghe-Huaihe area. The main flood season occurs after the Meiyu period over Changjing-Huaihe River Valley and is properly referred to as Shuxun period (flood season in the dog-days). The oscillation of rainfall in Henan shows out of phase in the direction from north to south and from west to east obviously during the Shuxun period. Especially it is important property of monsoon climate over East Asia that the monsoon rain belt jumps from south of Shahe River to the littoral area and to the north of Huanghe River from Slight Heat (11th solar term) to Great Heat (12th solar term). This expresses that after the end of the meiyu period the main rain belt in the East Chain does not turn immediately to the north arear of Huanghe, but gradually, by stages. The analysis and reasearch of the precipitation climate in the Shuxun period are helpful to deepen our knowledge of the monsson motion in the eastern Asia.
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