Title: Study on forming reasons of a continuous autumn rain event in 2009 in He′nan province
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.
Publication Year: 2011
Publication Date: 2011-01-01
Language: en
Type: article
Access and Citation
AI Researcher Chatbot
Get quick answers to your questions about the article from our AI researcher chatbot