中国周降雨量与相关海域周平均海面水温

doi:10.11867/j.issn.1001-8166.2000.01.0034

地球科学进展 ›› 2000, Vol. 15 ›› Issue (1): 34 -39. doi: 10.11867/j.issn.1001-8166.2000.01.0034

中国周降雨量与相关海域周平均海面水温

崔茂常 ^①,练树民 ^①,纪立人 ^②

①中国科学院海洋研究所,山东青岛 266071;②中国科学院大气物理研究所,北京 100080

收稿日期:1998-11-20 修回日期:1999-03-18 出版日期:2000-02-01
通讯作者: 崔茂常,男,1945年11月出生于湖北襄阳县,研究员,主要从事海洋环流和海气相互作用研究。
基金资助:
国家自然科学基金项目“天气预报再分析数据与亚洲夏季风气候学”(编号:49875020)和大气科学和地球流体力学数值模拟国家重点实
验室一般项目资助。

WEEKLY RAINFALL IN CHINA AND WEEKLY MEAN SEA SURFACE TEMPERATURE IN RELATED OCEANS

CUI Maochang ^①,LIAN Shumin ^①,JI Liren ^②

①Institue of Oceanology,Chinese Acdamy of Science,Qingdao 266071,China;②Institue of Atmospheric Physics,Chinese Academy of Sciences,Beijing 100080,China

Received:1998-11-20 Revised:1999-03-18 Online:2000-02-01 Published:2000-02-01

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应用旋转主成分分析和复变量莫莱特小波变换分析了1982～1995年中国境内实测周降雨量和1982～1994年美国环境预报中心周平均海面水温资料,研究其时空变化特征及其相互关系。结果表明:海面水温乃至降雨量的周年变化,主要源于太阳直射点在南北回归线之间的往复运动和海面云雾覆盖量及其相关联的季风周年变化;依降雨量的周年变化可将中国自然地分为12个降水区,从海气相互作用的角度来看其年际变化主要取决于太阳辐射强度、有效日照率和亚洲夏季风的年际变化;厄尔尼诺只对黄河河套北部和两广降水区年降雨量有较大影响;西太平洋暖池以东海面水温的年际变化仅对黄河河套北部年降雨量有一定影响。

关键词: 周平均海面水温, 旋转主成分分析, 小波分析, 中国周降雨量

In this study,rotated principal component analysis and complex Morlet transform were used in analysing observed weekly rainfall in China during 1982～1995 and NMC weekly mean SST in related oceans during 1982～1994.Results showed that the annual variations of SST and rainfall are mainly caused by the return movement of vertical incident point of sun light between the Tropics of Capricorn and Cancer and the annual variations of cloud and fog coverage over seas.According to the rainfall annual cycle,China can be reasonally divided into 12 rainfall regions,where the annual variations of rainfall are basiclly dependent on the annual variations of sun radiation strength,effective sunshine rate and Asian summer monsoon.EI Nin~o has an obvious influence only on the north of the Great Bend of the Yellow River and Guangdong and Guangxi provinces;the annual variation of SST in east of warm pool has a certain influence only on the north of the Great Bend of the Yellow River.

Key words: Weekly rainfall in China, Weekly mean SST, Rotated PCA, Wavelet transform.

中图分类号:

P461
P732

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