长江流域、华北降水特征与南亚高压的关系分析  

Relationship between South Asian High and Characteristic of Precipitation in Mid-and Lower-Reaches of Yangtze River and North China

作　　者：黄燕燕[1] 钱永甫[1] 

机构地区：[1]南京大学大气科学系,江苏南京210093

出　　处：《高原气象》2004年第1期68-74,共7页Plateau Meteorology

基　　金：国家自然科学基金项目(40175021;40233037);国家重点基础研究发展规划项目"我国重大气候灾害的形成机理和预测理论研究"(1998040900)共同资助

摘　　要：利用多年月平均气象场再分析资料和中国月平均降水资料,研究了长江流域和华北地区的典型旱涝年降水与南亚高压的关系,发现两地区的典型旱涝现象与南亚高压的异常增强或减弱、中心位置的经纬度偏差均有关。南亚高压异常增强,易造成长江流域涝、华北地区旱;南亚高压异常减弱,易造成长江流域旱、华北地区涝。同时发现,长江流域、华北地区的典型旱涝现象具有明显的反位相特征。By using of the NCEP/NCAR monthly mean meteorological reanalysis data and the monthly precipitation data in China, the relationships between the South Asian High(SAH) and the precipitation of the typical drought and flood years in the mid- lower reaches-of the Yangtze River and North China are studied in this paper. It is found that the intensity and the center position of the SAH can affect the droughts and floods in the two areas. Anomalous intensifying of the SAH usually induce floods in the mid-and lower-reaches of Yangtze River and droughts in North China; while anomalous weakening of the SAH often induce droughts in the mid-and lower-reaches of the Yangtze River and floods in North China. In addition, it is concluded that the anomalies of precipitation in the two areas are usually in opposite phase.

关 键 词：南亚高压 长江流域旱涝 华北地区旱涝 合成分析 

分 类 号：P461[天文地球—大气科学及气象学]