J4 ›› 2008, Vol. 25 ›› Issue (1): 32-37.

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Severe Drought in the Early Summer of 2005 in Yunnan and Middle—high Latitudes Circulation

LIU Yu1, ZHAO Erxu2,PENG Guifen 3,YANG Shuqun4   

  1. 1.Climate Centre of Yunnan,Kunming 650034,China;2.Meteorological Science and Technology Services CenterofYunnan,Kunming 650034,China;3.Meteorological ObservatoryofYunnan,Kunming 650034,China;4.Climate Centre ofSichuan,Chengdu 610072,China
  • Received:2006-12-15 Revised:2007-01-30 Online:2007-03-31 Published:2007-03-31



  1. 1.云南省气候中心,云南昆明650034; 2.云南省气象科技服务中心,云南昆明650034;3.云南省气象台,云南昆明650034; 4.四川省气候中心,四川成都610072
  • 作者简介:刘瑜(1958一),女,云南人,高级工程师,主要从事短期气候预测和研究工作.E-mail:cqkly@163.com
  • 基金资助:



In the late spring and early summer of 2005,Yunnan encountered drought event,which was the severest in the recent 50 years.By comparative analysis.it was found that the main influence factors for this abnormal weather event weIe tlle delay of seasonal evolution of South Asia hish。and relatively weak cold air in polar region,as well as relatively strong of the subtropical hish over the western Pacific lying southwestwards resulted from meridional circulation over Asia,and lagging of the seasonal shift of circulation in middle—hish levels.

Key words: Yunnan, drought, South Asia hish, subtropical hish, westerly jet


2005年初夏云南大部地区出现了50 a来最为严重的干旱天气,影响范围、程度及所造成的经济损失达历史之最。通过对比分析,造成此异常气候主要是南亚高压季节性北跳偏晚,极地冷空气偏弱,亚洲地区的经向环流造成西太平洋副高偏强、偏西、偏南,中高层大气环流季节转换滞后所致。

关键词: 云南, 干旱, 南亚高压, 副热带高压, 西风急流

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