1997—1998年El-Nio至La-Nia期间东海黑潮的变异  

VARIABILITY OF THE KUROSHIO IN THE EAST CHINA SEA DURING EL-NIO TO LA-NIA PHENOMENON OF 1997 AND 1998

作　　者：袁耀初[1] 刘勇刚[1] 苏纪兰[1] 

机构地区：[1]国家海洋局第二海洋研究所

出　　处：《地球物理学报》2001年第2期199-210,共12页Chinese Journal of Geophysics

基　　金：国家自然科学基金!项目 ( 4973 62 0 0;4 97762 87) ;国家重点基础研究发展规划项目! (G1 9990 4 3 80 2 ;G1 9990 4 3 80 5)

摘　　要：基于日本“长风号”调查船在 1 997与 1 998年 1 0个航次的CTD资料 ,采用改进逆方法及改进动力计算方法对东海黑潮的流速、流量进行计算 .1 997年 5月出现了El Ni no现象 ,东海黑潮流量在 1 997年夏季减少 ,1 997年东海黑潮的平均流量也减少 .在 1 997年 1月与 6— 7月 ,即El Ni no现象出现前后 ,东海环流的流态有些不同 .在 1 998年 4至 1 1月黑潮在PN断面出现多流核心的结构 ,特别在 1 0— 1 1月出现 3个流核心 ,黑潮主流核的位置秋季时东移 .1 995年与 1 998年都是东海黑潮异常年 ,这些异常现象可能与冲绳岛以南出现的反气旋涡的强度变化以及从El Ni no现象过渡到La NiA modified inverse and dynamic methods are used to compute the velocity and volume transport (VT) of the Kuroshio in the East China Sea, based on the CTD data of the ten cruises in 1997 and 1998. When El Nio phenomenon occurred in May of 1997, both VT of the Kuroshio in summer of 1997 and the average VT of the Kuroshio in 1997 decreased. There are different two current patterns of the circulation in the East China Sea for January and June July of 1997, which was before and after El Nio phenomenon, respectively. The Kuroshio through Section PN has multi current cores during the period from April to November of 1997, especially it has three current cores in October and November of 1997. The position of the main current core of the Kuroshio moves eastward in the autumn. Both 1995 and 1998 are anomalous years for the Kuroshio in the East China Sea, which may be due to the following two reasons: (1) the increase of the Kuroshio VT may be associated with the strengthen of the anticyclonic recirculating gyre south of Okinawa Island; (2) the transform from El Nio phenomenon to La Nia is occurred in summer of 1995 and 1998.

关 键 词：东海 黑潮 厄尔尼诺 拉尼娜 异常年 1997年 1998年 多流核心 

分 类 号：P732[天文地球—海洋科学] P731.27