摘要
2015年9月环流特征如下:北半球高纬地区极涡为单极型,中高纬地区为3波型分布,西北太平洋副热带高压偏西且断裂,9月全国平均降水量为72.4 mm,比常年同期(65.3 mm)偏多14.0%;全国9月平均气温为16.9℃,较常年同期(16.6℃)偏高0.3℃。月内共有6次强降水过程,24站出现了极端日降水量。西北太平洋和南海有4个台风生成,1517号台风基洛从中太平洋移入,1521号台风杜鹃两次登陆我国并带来大范围降水。西北东部及内蒙古中部等地气象干旱缓解,黄淮大部及辽宁等地气象干旱持续发展。全国多地遭受雷雨大风、冰雹等强对流天气袭击。
The main characteristics of the general atmospheric circulation in September 2015 are as follows.There was one polar vortex center in the Northern Hemisphere.In the middle-high latitudes,the circulation presented a three-wave pattern.The subtropical high lay westwards and got broken in the middle.Meanwhile,monthly mean precipitation amount was 72.4 mm,which is 14.0%more than its climatological mean（65.3 mm）.Monthly mean temperature was 16.9＂C,a little bit higher than its climatological mean（16.6℃）.There were 6 heavy rainfall events with extreme continuous precipitation events observed at 24 stations in China.Four typhoons were generated over the western North Pacific and the South China Sea,and one typhoon came from the Middle Pacific（No.1517 Kilo）,Typhoon Dujuan（No.1521） landing China twice.The drought of eastern part of Northwest Region and the middle of Inner Mongolia got relieved,while in most of Huanghuai Region,Liaoning and other places,the drought developed continuously.In addition,many places were attacked by thunderstorms,hail and other severe convective weather in September 2015.
出处
《气象》
CSCD
北大核心
2015年第12期1562-1567,共6页
Meteorological Monthly
关键词
副热带高压
暴雨
台风杜鹃
subtropical high
rainstorm
Typhoon Dujuan
