东亚冬季风与中国夏季气候变化
A STUDY ON RELATION BETWEEN EAST ASIAN WINTER MONSOON AND CLIMATE CHANGE DURING RAINING SEASON IN CHINA
-
摘要: 选取NCEP再分析高度场和风场资料、地面长波辐射(OLR)资料以及中国160个测站的降水资料,利用相关分析和合成分析方法,从资料分析入手来研究东亚冬季风异常变化及其对中国夏季降水的影响。研究表明:东亚冬季风有明显的年际和年代际变化特征,1950年代～1980年代中期为强冬季风时段,1980年代中期以后,季风明显减弱,为弱冬季风期。冬季风异常对中国大部分地区,特别对中国长江中下游地区的降水影响较大。分析进一步揭示了强弱东亚冬季风年后期海温分布和夏季流场明显不同的变化特征,并结合以前的许多研究对长江中下游地区降水异常形成的可能原因作了解释,指出正是由于这种不同的海温分布以及夏季环流的异常变化使得中国长江中下游地区在强(弱)冬季风年的夏季降水偏少(偏多)。Abstract: Based on the data of NCEP,OLR and rainfall of China,we studied the influences of the East Asian winter monsoon activities on the precipitation during the raining season over China by correlation analysis and composite analysis. The result shows that annual and interdecadal change of East Asian winter monsoon is distinct. It is stronger from 1950s to the middle of 1980s but weaker after the middle of 1980s. The effect of abnormal winter monsoon on the precipitation during raining season is significant over lower-middle reaches of the Yangtze River basin. It is revealed that the precipitation will increase when preceding winter monsoon is weaker but decrease when preceding winter monsoon is stronger. In this paper,some appropriate reasons are given to explain the abnormal rainfall by analyzing the distribution of SSTA and the variation of summer circulation. It is pointed out definitely that the variation of SSTA and summer circulation is a primary cause of abnormal rainfall over lower-middle reaches of the Yangtze River.
-
[1] 孙淑清,孙柏民.东亚冬季风环流异常与中国江淮流域夏季旱涝天气的关系[J].气象学报,1995,53:438-450. [2] LIU H,TOSI E,TIBALTI S.On the relationship between northern hemisphere weather regimes in winter time and springprecipitation over China Quart[J].J Roy Metor Soc,1994,120:185-194. [3] JI Liren,SUN Shuqing.Observational and model study on interseasonal connection of atmospheric circulation[A].GeneralCirculation of the Atmosphere[C].Bejing:China Meteorological Press,1995.365-376. [4] 郭其蕴.东亚夏季风强度指数及其变化特征[J].地理学报,1983,38:207-217. [5] 施能.近40年东亚冬季风强度的多时间尺度变化特征及其与气候的关系[J].应用气象学报,1996,7:175-181. [6] 陈隽,孙淑清.东亚冬季风异常与全球大气环流变化——Ⅰ.强弱冬季风影响的对比研究[J].大气科学,1999,23(1):101-111. [7] 崔晓鹏,孙照渤.东亚冬季风指数及其变化的分析[J].南京气象学院学报,1999,22:321-325. [8] 梁建茵,吴尚森,游积平.南海夏季风的建立及强度变化[J].热带气象学报,1999,15:97-105. [9] 赵振国.中国夏季旱涝及环境场[M].北京:气象出版社,1999.28-37. [10] 李崇银.东亚冬季风异常和ENSO[A].气候变化若干问题研究[M].北京:科学出版社,1992.87-98. [11] 李崇银.频繁强东亚大槽活动与El Nino事件的发生[J].中国科学(B辑),1988,6:667-674. [12] 晏红明,肖子牛.印度洋海温异常对亚洲季风区天气气候影响的数值模拟研究[J].热带气象学报,2000,16:18-27. [13] 晏红明,杞明辉,肖子牛.云南5月雨量与热带海温异常及亚洲季风变化的关系[J].应用气象学报,2001,12:366-376. [14] 肖子牛,晏红明.El Nino位相期间印度洋SSTA对中国南部初夏降水及初夏亚洲季风影响的数值模拟研究[J].大气科学,2001,25:172-183. -
点击查看大图
计量
- 文章访问数: 1075
- HTML全文浏览量: 0
- PDF下载量: 1631
- 被引次数: 0
下载:
粤公网安备 4401069904700003号