利用典型相关理论,分析了云南8月低温与当年春季气温场之间的关系,得出了一些有意义的结果。春季影响云南的西风带南支槽、副热带高压和北方南下冷空气等天气系统的强弱(南支槽的强和弱用滇西气温的负距平和正距平表示,副热带高压的强和弱用滇东南气温的正距平和负距平表示,冷空气的强和弱用滇东气温的负距平和正距平表示)与8月份云南是否出现低温天气关系较大,8月份云南北部和西部出现低温天气与2月份冷空气和南支槽的强弱呈正相关,与3月份副热带高压外围暖湿气流的强弱也呈正相关,而与3月份冷空气的强弱呈负相关。8月份西部地区的低温天气则与4月份昆明静止锋的强弱呈正相关,与西风带南支波动的强弱呈负相关。

The temperature fields between August and spring of Yunnan were studied by using canonical correlation theory.It is found that the temperature fields in August of Yunnan and southern branch westerly trough,subtropical high,Kunming quasi-stationary front are related to the strength variation of them.The microthermal climate in August of Northwest Yunnan is positive correlation to the strength variation of southern branch westerly trough in February and subtropical high in March and Kunming quasi-stationary front in April.