摘要
根据海河流域测站降水资料、NCEP/NCAR再分析资料和日本气象厅JRA-25资料,分析了1951—2008年夏季海河流域大气水汽含量的变化以及不同环流形势下的水汽输送特征。结果表明:海河流域大气水汽含量存在显著的年代际变化特征,与降水量存在显著统计相关;海河流域上空纬向水汽输送主要发生在850～700hPa,经向水汽输送在850hPa以下存在强的水汽输送带,它是海河流域水汽的主要贡献者,也是影响海河流域降水的最主要因素之一。气旋型环流和南风型环流对海河流域水汽输送有较大影响。
Based on observational station data in the Haihe River basin, NCEP/NCAR reanalysis data and JRA-25 data, the change of water vapor content, and water vapor budget and transport in summer over the Haihe River basin from 1951 to 2008 are studied. The results show that water vapor content over the Haihe River basin has obvious interdecadal variations, and is significantly correlated with precipitation. The zonal water vapor transfer to the Haihe River basin occurs mainly between 850 and 700 hPa, while the meridional water vapor transfer mainly happens below 850 hPa. The southerly strong moisture transfer belt below 850 hPa is the primary contributor of water vapor for the Haihe River basin, and also the major influential factor for precipitation in the basin. The influences of cyclonic pattern and south wind patterrn circulation upon the water vapor content are the most significant.
出处
《气候变化研究进展》
CSCD
2011年第3期184-188,共5页
Climate Change Research
基金
国家重点基础研究发展计划(973)项目"海河流域水循环演变机理与水资源高效利用"
关键词
海河流域
水汽含量
水汽通量
环流型
Haihe River basin
water vapor content
water vapor flux
circulation pattern
