【摘要】 2005年春末夏初云南大部地区出现了50年一遇的高温干旱天气,通过对东南亚地区的水汽及对流进行诊断分析,发现中南半岛地区夏季风爆发的早迟与云南雨季开始的早迟有显著的正相关关系;前期4月孟加拉湾水汽向北输送强(弱)以及苏门答腊岛附近的对流活动强(弱),则云南雨季开始早(迟)。分析表明造成云南2005年初夏干旱的主要原因是中南半岛地区的夏季风爆发较常年偏晚,前期孟加拉湾地区的经向水汽输送以及苏门答腊岛附近的对流活动较常年偏弱。更多还原

【Abstract】 In the late spring and early summer of 2005, Yunnan encountered weather with high temperature and drought, which is the worst in the recent 55 years. After the diagnostic analysis of convection and moisture in Southeast Asia, it was found that there is positive correlation between onset of summer monsoon over the Indochina Peninsula and establishment of rainy season of Yunnan province;If moisture transportation from Bay of Bengal is strong(weak) and convective activity around Sumatra island is active(non-active), establishment of rainy season of Yunnan is early(late).In 2005,the main causes of early summer drought of Yunnan are: The onset of summer monsoon over the Indochina Peninsula is later;Meridional moisture transportation from Bay of Bengal and convective activity around Sumatra island are weaker.更多还原