中文摘要：

主要讨论物理量假相当位温θse的变化与云南雨季开始的关系.研究表明θse能很好地描述热带季风气团的活动属性,随着季节由春到夏的转换,热带季风气团移动的路径是向北向西的,孟加拉湾地区向北的水汽输送强弱对云南地区的夏季风建立早迟有重要的影响.并且利用θse配合云南地区的降水定义了云南地区季风建立的气候标准和年际标准.提出了一个值得讨论的问题：能否利用对流层上层θse的变化来预测云南雨季建立.

英文摘要：

The relations between change of θse and rainy season of Yunnan are studied.The results show that θse can better describes the characteristic of the activity of tropical monsoon air mass.With season shifting from spring to summer,the tropical monsoon air mass moves northward and westward.If the meridional moisture transportation of the Bay of Bengal is strong（weak）,the rainy season of Yunnan begins early（late）.The climate standard and annual standard of monsoon establishment of Yunnan are defined by using θse and rainfall of Yunnan,separately.Finally,a question is put forward：can Changes of θse of upper troposphere predict monsoon establishment of Yunnan.