主办单位：中国气象局沈阳大气环境研究所
国际刊号：ISSN 1673-503X
国内刊号：CN 21-1531/P
气象与环境学报

气象与环境学报 ›› 2011, Vol. 27 ›› Issue (2): 39-44.doi:

• 论文 • 上一篇    下一篇

2009年秋季河南省一次长连阴雨天气成因分析

孔海江1,2,3,4  吴胜安1,2   王蕊3   赵培娟3  乔春贵3  吕晓娜3   

  1. 1．中国科学院大气物理研究所，北京 100029；2．中国科学院研究生院，北京 100049；3．河南省气象台，河南 郑州 450003；4．中国气象局农业气象保障与应用技术重点开放实验室，河南 郑州 450003
  • 收稿日期:2010-12-16 修回日期:2011-01-14 出版日期:2011-04-30 发布日期:2011-01-14

Study on forming reasons of a continuous autumn rain event in 2009 in He’nan province

KONG Hai-jiang1,2,3,4 WU Sheng-an1,2 WANG Rui3 ZHAO Pei-juan3 QIAO Chun-gui3 LV Xiao-na3   

  1. 1. Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, China; 2. Graduate University of Chinese Academy of Sciences, Beijing 100049, China; 3. He’nan Meteorological Observatory, Zhengzhou 450003, China; 4. Key Laboratory of Agrometeorological Safeguard and Applied Technique, China Meteorological Administration, Zhengzhou 450003, China
  • Received:2010-12-16 Revised:2011-01-14 Online:2011-04-30 Published:2011-01-14

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摘要： 采用合成分析和动力诊断分析及统计方法，利用NCEP资料和常规气象观测资料对造成2009年9月6-20日河南省北中部地区长达15 d连阴雨天气成因进行分析。结果表明：200 hPa高空急流的出现并且维持，南亚高压的偏东偏北，副热带高压的偏西略偏北，以及边界层的东北风（或偏东风），是造成此次长连阴雨天气的主要影响因素；200 hPa东亚西风急流的正异常与对流层中上层（300hPa）的暖异常在动力关系上相互匹配；湿层浅薄，水汽条件不充沛，冷空气影响的层次偏低是造成连阴雨天气累计降水量偏小的可能原因；温度距平随高度递增使得高云量增加，是形成日照偏少、气温明显偏低的可能原因。

关键词: 连阴雨, 副热带高压, 高空急流, 边界层

Abstract: Based on NCEP data and the conventional observation data, forming reasons of a continuous autumn rain event on September 6 to 20 in 2009 were analyzed in the mid-north region of He’nan province. The results indicate that the main reasons causing this process are the occurrence and maintenance of upper level jet in 200 hPa, the leaning eastern and northern South Asia high, the northwestern subtropical high pressure and the northeastern wind in boundary layer (or the easterly wind). The positive anomaly in East Asia westerly jet of 200 hPa and warm anomaly in the middle and upper layers of troposphere (300 hPa) match each other on dynamic relation. The shallow wet layer, insufficient water vapor conditions and the lower level influenced by cold air could make the accumulative total precipitation of the continuous autumn rain lower. Temperature anomaly increases with height and makes high cloud cover increasing, which is the possible reason for few sunshine and lower air temperature.

Key words: A continuous rain, Subtropical high pressure, Upper level jet, Boundary layer

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