气象与环境学报2011，Vol.27Issue(2)：39-44,6.
2009年秋季河南一次连阴雨天气成因分析
Study on forming reasons of a continuous autumn rain event in 2009 in He'nan province
摘要
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.关键词
连阴雨/副热带高压/高空急流/边界层Key words
A continuous rain/ Subtropical high pressure/ Upper level jet/ Boundary layer分类
天文与地球科学引用本文复制引用
孔海江,吴胜安,王蕊,赵培娟,乔春贵,吕晓娜..2009年秋季河南一次连阴雨天气成因分析[J].气象与环境学报,2011,27(2):39-44,6.基金项目
中国气象局农业气象保障与应用技术重点开放实验室项目"河南省关键农事季节连阴雨中期预报方法研究"(Z201003)、"河南省持续性暴雨中期预报方法研究"(Z200903)和公益性行业(气象)科研专项"夏玉米高产稳产气象保障关键技术研究"(CYHY201006041)第7子专题(气象灾害监测、预报预警)共同资助. （Z201003）
