南海夏季风撤退的气候特征Ⅱ——年代际变化  

CLIMATOLOGICAL CHARACTERISTICS OF THE RETREAT PERIOD OF SOUTH CHINA SEA SUMMER MONSOON Ⅱ——Interdecadal Variation

作　　者：王安宇[1] 梁建茵[2] 冯瑞权[3] 林建恒[3] 吴池胜[1] 

机构地区：[1]中山大学大气科学系/季风与环境研究中心,广东广州510275 [2]中国气象局广州热带海洋气象研究所,广东广州510080 [3]澳门地球物理暨气象局

出　　处：《热带气象学报》2010年第3期325-329,共5页Journal of Tropical Meteorology

基　　金：广东省科技计划项目"华南天气异常的机理及经向环流业务模式的开发"(2005B326011008)资助

摘　　要：南海地区夏季风撤退期有明显的年代际变化,与南海夏季风维持期相类似,在1970年代末期有明显的突变。所以分析工作以1978年为界,主要是将前20年情况与后20年进行对比。前20年夏季风撤退较早,撤退期降水较少,对流活动较弱;后20年则与此相反,夏季风撤退较晚,撤退期降水较多,对流活动较强。南海地区夏季风撤退期的年代际变化与PDO和太阳磁循环的气候变化比较一致。Using daily gridpoint meteorological data of NCEP over a period from 1958 to 1997,interdecadal variations of the summer monsoon in the South China Sea（SCS） are analyzed for the retreat periods.The results show that the abrupt change in the general circulation in the late-1970s had obviously affected the retreat of the summer monsoon in the SCS.We selected 1978 as the critical year for the abrupt change.The comparisons are made between two 20-year periods before and after it.For the first 20-year period,the retreats of the summer monsoon in the SCS happened earlier and had less accompanying precipitation and weaker convection than the second one.The interdecadal variations of the SCS summer monsoon retreats are consistent with the climotological variations of the Pacific Decadal Oscillation（PDO） and the solar magnetic cycle.

关 键 词：气候学 南海夏季风 撤退 

分 类 号：P425.42[天文地球—大气科学及气象学]