摘要
利用1951—2002年NCEP/NCAR再分析月平均气候资料和西北地区东部夏季降水资料,研究了越赤道气流的年际变化及其对西北地区东部夏季降水的影响。结果表明,自1951年以来,越赤道气流总量呈增强趋势,且持续性好;索马里急流是最主要的越赤道气流,且比较稳定,它是影响西北地区东部夏季降水的重要环流因素。
With the aid of the NCEP/NCAR monthly reanalysis data-set and the summer precipitation data in the east of northwest China during 1951-2002 ,the interannual variability of cross-equatorial flow and its influences on summer precipitation in the east of northwest China are analyzed. It is concluded that the cross-equatorial flow has strengthened and is more persistent since 1951 ;and the Somali jet is the principle and stable cross-equatorial flow, and also an important circulation factor which affects the summer precipitation in the east of northwest China.
出处
《南京气象学院学报》
CSCD
北大核心
2006年第2期254-257,共4页
Journal of Nanjing Institute of Meteorology
基金
甘肃省"十五"科技攻关项目(GS012-A45-118)"西北干旱成因及其应用研究"
"甘肃省人工增雨防雹作业决策指挥系统"(2002人影-3)
关键词
越赤道气流
年际变化
西北地区东部
夏季降水
cross-equatorial flow
interannual variability
eastern northwest-China
summer precipitation
