| 天气与气候 |
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| Inter-decadal Relationships between Summer Arctic Oscillation and Aridity-Wetness Feature in Northwest China |
WANG Peng\|xiang1,2， HE Jin\|hai2， ZHENG You\|fei2, ZHANG Qiang1
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| 1.Gansu Province & China Meteorological Administration Key Laboratory of Arid Climatic Changes and Reducing Disaster; Lanzhou Institute of Arid Meteorology, China Meteorological Administration, Lanzhou 730020, China; 2.Nanjing University of Information Science And Technology, Nanjing 210044, China |
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Abstract Based on observation data of summer precipitation and evaporation from 1960 to 2003 at 131 stations in Northwest China (Xingjiang, Qinghai, Gansu, Ningxia, Shanxi and the west of Neimenggu) and summer Arctic Oscillation index, at first, an aridity\|wetness homogenized index was defined, then the correlation between summer Arctic Oscillation and summer drought and moist characteristics of northwest China was analyzed. The results show that the inter\|decadal correlation is prominent between summer Arctic Oscillation and summer drought and moist characteristics of northwest China. In decades with strong summer Arctic Oscillation, the sea level pressure (SLP) was positive anomaly in East Asia and negative anomaly in Pacific; 700 hPa wind field showed anticyclone anomaly circumfluence in Baikal and its south region, west wind anomaly in westerly region of Northwest China and north wind anomaly in monsoon region of Northwest China; 500 hPa height field showed west\|low and east\|high characteristics in Northwest China, thus the East Asia monsoon was weakened, the west wind air flow prevailed in westerly wind region of Northwest China, precipitation increased and the climate became wetter, while north wind air flow prevailed in monsoon region of Northwest China, precipitation decreased and the climate became more dry, and vice versa.
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Received: 12 September 2006
Published: 20 September 2007
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［1］Baldwin M P,Cheng X,Dunkerton T J.Observed correlations between winter-mean tropospheric and stratospheric circulation anomalies［J］.Geophys Res Lett,1994,21:1141-1144.
［2］Perlwitz J H,Graf F.The statistical connection between tropospheric and stratospheric circulation of Northern Hemisphere in winter［J］.J Climate,1995,8:2281-2295.
［3］Kitoh A,Koide H,Kodera K.Interannual variability in the stratospheric\|tropospheric circulation in a coupled ocean-atmosphere GCM［J］ .Geophys Res Lett,1996,23:543-546.
［4］Kodera K,Chiba M,Koide H,et al.Interannual variability of the winter stratosphere and troposphere in the Northern Hemisphere［J］.J Meteor Soc Japan,1996,74:365-382.
［5］Thompson D W J,Wallace J M.The Arctic Oscillation signature in the wintertime geopotential height and temperature field［J］.Geophys Res Lett,1998,25(9):1297-1300.
［6］Kutzbach J E.Large-scale features of monthly mean Northern Hemisphere anomaly maps of sea level pressure［J］.Mon Wea Rev,1970,98:708-716.
［7］Trenberth K E,Paolino D A.The Northern Hemisphere sea level pressure data set:Trends,errors and discontinuities［J］.Mon Wea Rev,1981,108:855-872.
［8］Wallace J M,Gutzler D S.Teleconnections in the geopotential height field during the Northern Hemisphere winter［J］.Mon Wea Rev,1981,109:784-812.
［9］Thompson D W J,Wallace J M.Annular modes in the extratropical circulation,Part I : Month-to-month variability［J］.J Climate,2000,13:1000-1007.
［10］杨小怡,胡跃文,郭品文,等,夏季北极涛动的时空特征析［J］.高原气象,2006,25（1）:82-89.
［11］Thompson D W,Wallace J M，Hegerl G C.Annular modes in the extratropical circulation.Part Ⅱ: trends［J］.J Climate,2000,13(5):1018-1036.
［12］武柄义,卞林根,张人禾.冬季北极涛动和北极海冰变化对东亚气候变化的影响［J］.极地研究,2004,16(3):211-220.
［13］龚道溢,王绍武.近百年北极涛动对中国冬季气温变化的研究［J］.地理学报,2003,58(4):559-568.
［14］何春,何金海.冬季北极涛动和华北气温变化的研究［J］.南京气象学院学报,2003,26(1):1-7.
［15］张强，胡隐樵，曹晓彦,等.论西北干旱气候的若干问题［J］.中国沙漠，2000，20（4）：357-362.
［16］董安祥,王鹏祥,林彬,等.中国气象灾害大典［M］.甘肃卷.北京：气象出版社,2005:76-82.
［17］王鹏祥,王宝鉴,黄玉霞,等.青海高原近43年夏季空中水汽分布及演变特征［J］.高原气象,2006,25（1）：60-65.
［18］赵艳宁,时兴合,秦宁生,等.青海南部地区40多年气候变化的特征分析［J］.中国沙漠,2005,25（4）：529-534.
［19］李栋梁,刘洪兰.黑河流量对祁连山气候年代际变化的响应［J］.中国沙漠,2004,24（4）：385-391.
［20］杨金虎,江志红,杨启国,等.中国西北汛期极端降水事件分析［J］.中国沙漠,2006,26（2）：320-325.
［21］王鹏祥,杨金虎.中国西北近45a来极端高温事件及其对区域性增暖的响应［J］.中国沙漠,2007,27（4）：649-655.
［22］王鹏祥,杨金虎,张强,等.近半个世纪来中国西北地面气候变化基本特征［J］.地球科学进展,2007,22(6):649-656.
［23］施雅风,沈永平,胡汝骥.西北气候由暖干向暖湿转型的信号\\影响和前景初步探讨［J］.冰川冻土,2002,24(3):219-226.
［24］施雅风.中国西北气候由暖干向暖湿转型问题评估［M］.北京:气象出版社,2003.
［25］王鹏祥,何金海,郑有飞,等.夏季北极涛动和东亚夏季风对西北夏季降水南北差异的影响［J］.地球科学进展,2007,22(增刊):167-173.
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2007, Vol. 27 
