Recent Changes in the East Asian Monsoon
Recent Changes in the East Asian Monsoon
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发表时间：
2013
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通讯作者：
Wang Huijun
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作者：
Wang Huijun
本文简要综述了近年来夏季风和冬季风变化的研究，主要集中在年代际和年代际尺度上。东亚夏季风的主要变化包括：20世纪70年代末东亚季风减弱，降水形势发生转变，1992-1993年中国南部降水增多，1999年后长江中下游降水减少，淮河流域降水增加，长江中下游地区降水减少，淮河流域降水增加。东亚冬季风的变化包括：80年代中期以后东亚季风及其年际变率减弱，80年代中期以后中国东北地区冬季降雪量增多，70年代中期以后东亚夏季风与ENSO的关系减弱。此外，还讨论了秋季北冰洋海冰减少对北半球冬季积雪的影响。
Studies on the recent changes of the summer and winter monsoons,with priority on decadal-interdecadal scales,are reviewed briefly in this paper.The major changes in the East Asian summer monsoon(EASM) include a weakening of the EASM and a shift in precipitation patterns at the end of 1970s;an increase in South China precipitation after 1992-1993;a decrease in precipitation in the middle-and-lower reaches of the Yangtze River and an increase in precipitation in the Huaihe River valley after 1999;and instability in the relationship between the EASM and El Ni?o-Southern Oscillation(ENSO).The changes in the East Asian winter monsoon(EAWM) include a weakening of the EAWM and its interannual variability after the mid-1980s,an increase in winter snowfall in Northeast China after the mid-1980s,and a weakening of the EAWM-ENSO relationship after the mid-1970s.In addition,the impact of the autumn Arctic sea ice decline on the winter snow cover in the Northern Hemisphere is discussed.These changes in EASM and EAWM indicate that the extreme climate and phenology have been significantly altered.