西北地区春、夏季降水的水汽输送特征  

Charateristic of Spatial Transportation of Water Vapor for Northwest China′s Rainfall in Spring and Summer

作　　者：王秀荣[1] 徐祥德[2] 王维国[1] 

机构地区：[1]中国气象局国家气象中心,北京100081 [2]中国气象局中国气象科学研究院,北京100081

出　　处：《高原气象》2007年第4期749-758,共10页Plateau Meteorology

基　　金：科研院所社会公益研究专项"南水北调西线工程水源区水资源评估技术研究"(2005DIB3J057);国家自然科学基金项目"全球变化背景下青藏高原关键区水分循环特征变化及其影响作用"(90502003)共同资助

摘　　要：运用1960—1997年内NCEP/NCAR的格点为2.5°×2.5°多个再分析气象要素资料以及西北地区95个加密测站降水资料,通过相关分析、合成分析等诊断方法对影响西北地区春、夏季降水的整层大气的水汽水平输送特征、各层水汽垂直输送特征以及西北地区春、夏季各个边界区域水汽输送特征进行了系列研究,揭示了西北地区季节性降水的水汽源以及水汽源三维输送路径特征;同时阐述了西北地区季节性降水与同期空中水汽含量显著性相关的原因。并用西北地区干、湿年份相关气象要素场对本文的一些分析结果进行了验证。By means of NCEP/NCAR reanalysis data and 95 stations observation data in Northwest China region from 1960 to 1997, and using the methods of correlation analysis and comprehensive analysis etc, the relationships among the horizontal water vapor transportation features of total layers atmosphere, vertical water vapor transportation features in each troposphere and water vapor amounts above Europe-Asia areas in spring （summer） season and Northwest China precipitation features at the same period are studied in this paper; as well as the regional boundary water vapor transportation features in Northwest China spring （summer）dryer （wetter） years are displayed. Which used reveal the water vapor resource of seasonal precipitation in Northwest China region and its three-dimensional transportation path to Northwest China region. And meanwhile, expatiate the remarkable correlation reason between seasonal precipitation of Northwest China and water vapor amount in air in the same season. The results analyzed in this paper are proved by some related meteorological factors in dry and wet spring or summer years in Northwest China.

关 键 词：西北地区 季节性降水 整层大气 各层大气 水汽源输送 

分 类 号：P426.6[天文地球—大气科学及气象学]