东亚夏季风的变化及对松嫩流域旱涝影响  

Variability of East Asian Summer Monsoon and Its Association with Rainfall Trend over Songhuajiang-Nenjiang River Basin

作　　者：张志秀[1] 谢安[2] 白人海[1] 

机构地区：[1]黑龙江省气象局气象台,哈尔滨150030 [2]北京大学物理学院,北京100871

出　　处：《气象科技》2006年第5期542-546,共5页Meteorological Science and Technology

基　　金：国家重点基础研究发展规划项目(G1999043405)资金资助

摘　　要：根据近50年来美国NCEP／NCAR再分析资料及松嫩流域39个站1951～2000年的逐日降水资料，用相关分析、合成、对比分析及小波分析等方法分析了东亚夏季风的年际、年代际变化及对松嫩流域旱涝的影响。结果表明，东亚夏季风对位于中高纬度的松嫩流域的旱涝趋势确有影响，但东亚夏季风的年际、年代际变化很大。东亚夏季风与松嫩流域盛夏降水特点相似：都具有3～5年、10～12年的变化周期，在20世纪60年代末、80年代初都有气候突变。松嫩流域的旱涝趋势除与东亚夏季风有关外，还与中高纬度的西风带天气系统及西太平洋副热带高压密切相关。The interannual and interdecadal variability of East Asian summer monsoon and its impacts on summer precipitation over the Songhuajiang-Nenjiang River basin are investigated based on NCAR/NCEP reanalysis data and 39-station rainfall data from 1951 to 2000. The results show that both East Asian summer monsoon and the rainfall over the Songhuajiang-Nenjiang River Basin possesses the variation periods of 3 - 5 and 10 - 12 years. Two climatic jumps occurred at the end of the 1960s and the beginning of the 1980s, respectively. East Asian summer monsoon significantly influences the rainfall over the Songhuajiang-Nenjiang River basin. In addition, factors such as the westerly and the Western Pacific subtropical high have also impacts on summer rainfall over the Songhuajiang-Nenjiang River basin.

关 键 词：东亚夏季风 年际和年代际变化 松嫩流域 旱涝 

分 类 号：P425.42[天文地球—大气科学及气象学]