贵州夏季水汽输送与旱涝的关系  

Relationship Between Water Vapor Transfer and Drought-Flood During Summer in Guizhou

作　　者：周涛[1] 白慧[1] 李忠燕[1] 许丹[1] Zhou Tao;Bai Hui;Li Zhongyan;Xu Dan(Guizhou Climate Center, Guiyang Guizhou,550002,China)

机构地区：[1]贵州省气候中心,贵州贵阳550002

出　　处：《科技资讯》2017年第13期78-83,共6页Science & Technology Information

基　　金：贵州省科学技术基金项目(黔科合J字【2010】2058号)东亚地区水汽输送与贵州夏季旱涝的研究

摘　　要：利用NCEP/NCAR(1981—2014年)的全球逐月经向风和纬向风、比湿和位势高度场等再分析格点资料及贵州省84个地面观测站1981—2014年7~8月降水资料,研究了东亚地区水汽输送异常与贵州旱涝的关系。分析表明:贵州7、8月降水异常旱、涝年份,东亚地区水汽输送存在显著的差异。旱年,中国大部分地区低层以东北风水汽输送为主,贵州等长江中、下游流域地区是水汽辐散区,不利于降水的产生;涝年,则以西南风水汽输送为主,贵州等长江中、下游流域地区为水汽辐合区,为贵州的降水提供了充足的水汽和能量。由此进一步证明水汽输送的建立是贵州夏季旱涝形成的重要机制。NCEP/NCAR(1981-2014years)Global monthly zonal and meridional wind wind,wet and Geopotential Height fields of grid data and Guizhou province84A ground station1981-2014Year7～8The monthly rainfall data,Study on water vapor transport anomalies in East Asia and the relationship between drought and flood in Guizhou.Analysis shows that Guizhou,7,and8of monthly precipitation anomaly drought and flood years,water vapor transport in East Asia there is a significant difference.Drought,mainly low-level easterly winds water vapor transport in most parts of China,Guizhou and other areas in the middle and lower reaches of the Yangtze River basin is moisture divergence,not conducive to the formation of the precipitation;wet years,mainly water vapor transport over the Southwest,Guizhou and other areas in the middle and lower reaches of the Yangtze River basin is a moisture convergence areas;for Guizhou precipitation offers plenty of moisture and energy.Further evidence of water vapor transport established important mechanism of summer flood and drought in Guizhou.

关 键 词：贵州 旱涝异常 水汽输送 

分 类 号：P426.616[天文地球—大气科学及气象学]