与前期秋冬季热带对流活动异常相关联的东亚冬春季大气环流及山东4月降水
PREVIOUS CONVECTION ANOMALY IN AUTUMN AND WINTER ASSOCIATED WITH THE GENERAL CIRCULATION OVER EAST ASIA IN WINTER AND SPRING AND APRIL PRECIPITATION IN SHANDONG
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摘要: 利用1979～2006年月平均OLR、850hPa、200hPa风场等资料,分析了山东4月降水异常年的前期秋、冬季热带地区对流活动特征,发现前冬12月的热带西太平洋地区对流活动异常与山东4月降水的关系最为密切,进一步分析其与东亚大气环流关系,结果表明西太平洋暖池上空的对流活动异常与冬春季东亚大槽、东亚局地的Hadley环流以及Walker环流的强弱紧密相连,且对流活动强(弱)年相伴随的东亚大气环流异常特征恰与山东4月降水异常少(多)年的特征相吻合,因此,12月热带西太平洋对流活动强弱可作为山东4月降水预测的一条重要依据。Abstract: Using OLR and 850 hPa and 200 hPa wind fields data(1979～2006),the characteristics of previous convection over the tropical area in Autumn and Winter of April precipitation anomaly in Shandong are diagnosed.The main conclusions are as follows.Previous convection anomaly over the Western Pacific Warm Pool in December has close relationship with the April precipitation in Shandong.Further analysis of the relationship of convection with the general circulation over the East Asia shows that the convection anomaly over the Western Pacific Warm Pool has close relationship with the East Asian Trough,the Hadley cell over East Asia and the Walker cell.The characteristics of East Asian atmospheric circulation accompanied by stronger(weaker) convection are identical to that accompanied by less(more) April precipitation in Shandong.Therefore,the convection anomaly over the tropics in December may be an important basis for April precipitation in Shandong.
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[1] 蒋尚城.卫星观测对长江流域旱涝的诊断研究[J].科学通报,1992,37(19):1 779-1 781. [2] 李月洪,刘煜.向外长波辐射与我国华北地区旱涝关系的初步研究[J].应用气象学报,1991,2(2):213-217. [3] 张苏平,朱平盛,蒋尚城.华北夏季降雨与热带对流活动的关系[J].气象学报,2001,59(4):502-508. [4] 张苏平,胡桂芳.山东夏季降水与前期热带洋区olr的关系及其预测[J].气象,2000(11):30-33. [5] 王庆,孙即霖,刘诗军,等.大气环流异常对山东雨季降水的影响[J].热带气象学报,2005,21(2):181-190. [6] 丁伟钰,梁经萍.南海地区OLR变化与华南汛期降水的联系[J].热带气象学报,2002,18(3):276-282. [7] 蔡学湛,王岩,许金镜.热带对流活动异常对华南前汛期旱涝影响的诊断分析[J].热带气象学报,2002,18(2):157-164. [8] 林爱兰.广东前汛期月降水异常的强信号研究及预测概念模型[J].热带气象学报,2002,18(3):219-226. [9] 黄荣辉,孙凤英.热带西太平洋暖池的热状态及其上空的对流活动对东亚夏季气候异常的影响[J].大气科学,1994,18(2):141-151. [10] LIEBMANN B,SMITH CA.Description of complete (interpolated) outgoing longwave radiation data set.Bulletin of the American[R].Meteoro-logical Society 77:1996:1 275-1 277. [11] 宋文玲.热带西太平洋对流活动与中国夏季降水[J].应用气象学报,2005(增刊):63-69. [12] WALLACE J M,GUTZLER D S.Teleconnection in the geopotential height field in the Northern Hemisphere[J].Mon Wea Rev,1981,109:784-812. [13] 丁一汇.高等天气学[M].北京:气象出版社,2005:256-269. [14] 孙柏民,李崇银.冬季东亚大槽的扰动与热带对流活动的关系[J].科学通报,1997,42(5):500-504. [15] 胡桂芳,邹瑾,张璇.下半年Nino3区海表升温对东亚春季大气环流及山东春季降水的影响[J].应用气象学报,2005,16(6):772-778. -
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