利用中国东部(100°E以东)139个站的1951～1999年逐月反演的土壤湿度资料以及160个气象台站的气温、降水资料，分析了我国东部不同区域前冬、春土壤湿度异常与夏季气候的关系。研究结果表明，黄河以南地区上年冬季土壤湿度与夏季降水存在正的相关关系，但这种滞后相关存在明显的地域差异。其中云贵高原和华中地区夏季气候对上年冬季土壤湿度响应最显著。黄河以北的华北和内蒙地区上年冬季土壤湿度与夏季降水有弱的负相关关系。除了云贵高原地区外，多数地区上年冬季土壤湿度与夏季温度存在负相关关系，其中负相关最显著的是华北地区。春季土壤湿度除与云贵高原的夏季气候关系密切外，与其他地区夏季气候的关系不显著。土壤湿度与气候的滞后相关表明土壤湿度在年际尺度上对后期气候有一定的影响。

The relationship between previous winter and springtime soil moisture and summer climate in the eastern China is investigated with the retrieved monthly soil moisture data of 139 stations and the precipitation and temperature observations of 160 stations over China from 1951 to 1999. The results show that there exists one or twoseason lagged positive correlation between soil moisture in spring or previous winter and summer rainfall in the regions south of the Huanghe River valley, and negative correlation in the regions north of the Huanghe River valley. The relationship is quite different in different regions. The significant twoseason lagged correlation exists in the YunnanGuizhou Plateau, Central China and North China. The oneseason lagged correlation is not significant, except over the YunnanGuizhou Plateau, where summer climate is sensitive to spring soil moisture.

“国家科技支撑计划课题“近百年来我国极端天气气候事件变化特征及其影响”(2007BAC29B02)资助