东海黑潮热输送变异与经向风异常  

Variations in the Kuroshio Heat Transport in the East China Sea and Meridional Wind Anomaly

作　　者：张启龙[1] 侯一筠[1] 齐庆华[1] 郑冬梅[1] 程明华[1] 

机构地区：[1]中国科学院海洋研究所

出　　处：《海洋科学进展》2008年第2期126-134,共9页Advances in Marine Science

基　　金：国家自然科学基金重点项目--中国海黑潮区关键动力过程的非线性特征及其预测方法(90411013);国家海洋专项基金项目--气候变化对中国近海海岸环境要素的影响研究(908-02-01-02);卫星海洋环境动力学国家重点实验室(国家海洋局第二海洋研究所)开放研究基金项目--源区黑潮年际和年代际变化规律研究(SOED0601)

摘　　要：根据日本气象厅1956-2003年在PN断面获得的观测资料和NCEP 850 hPa风资料,分析了东海黑潮热输送的变异特征,并探讨了冬、夏季热输送与风异常的关系。结果表明,黑潮通过PN断面多年平均的热输送达16.52×1014W,热输送的年际和年代际变化都很明显,其主要变化周期为准2 a,5 a和22 a。黑潮热输送在1976年前后发生了一次由弱到强的气候跃变。黑潮热输送具有很强的长期的线性增加趋势,在1956-2003年增加了约6.51×1014W。相关与合成分析结果显示,南海南部和黑潮流域上空的经向风异常对东海黑潮热输送的年际变化有重要影响,即当偏南风异常增强时,黑潮热输送将加强,反之将减弱。Based on the temperature and salinity data observed by Japanese Meteorological Agency along the PN section during 1956 to 2003 and the 850 hPa wind data from NCEP during 1955 to 2003, the variation characteristics of the Kuoshio heat transport in the East China Sea were analyzed, and the relationship between the Kuroshio heat transport in winter and summer and the wind anomaly was also discussed. It is shown from the analysis results that the multi-year seasonal average of the Kuroshio heat transport through the PN section is 16.52×10^14w, the interannual and interdecadal variations in the Kuroshio heat transport are significant with main variation periods of near 2 year, 5 year and 22 year, and the Kuroshio heat transport underwent an abrupt change from weakness to intenseness in about 1976. The Kuroshio heat transport has a long-term linear increasing trend with an increase in about 6.51×10^4W during 1956 to 2003. It is shown from the analysis results that the meridional wind anomalies over the southern South China Sea and the Kuoshio area have an important effect on the interannual variations in the Kuroshio heat transport, namely, the Kuroshio heat transport will be increasing with increasing southerly wind anomaly, and the Kuroshio heat transport will be decreasing with decreasing southerly wind anomaly.

关 键 词：东海 黑潮 热输送 

分 类 号：P731.27[天文地球—海洋科学]