中文摘要：

利用HYCOM全球同化数据和ARGO浮标数据,分析了吕宋海峡东西两侧海水温盐特性的差异,探讨了吕宋海峡以东的海洋涡旋在西移过程中是否能够穿越黑潮对南海局地水的温盐特性产生影响。通过分析吕宋海峡东西两侧的温盐特性发现,在气候平均态下,跨越黑潮流轴的温度梯度具有冬天弱夏天强的特征,并且吕宋海峡东侧和南海北部的温盐特性之间存在较大差异,可见吕宋海峡以东的海水温盐特性并不能被传递到南海北部。吕宋海峡以东,在采用HY-COM资料期间（2003—2009年）,本文共检测到反气旋涡24个和气旋涡39个,仅有一例气旋涡进入南海。其中反气旋涡多沿22°N以北西移,在到达黑潮后被黑潮平流向北,沿22°N以南西移的反气旋涡,多在遇到巴布延群岛后迅速耗散衰减,不能通过吕宋海峡进入南海。出现在21°N以南气旋涡多于反气旋涡,在遇到巴布延群岛及黑潮后,也会衰减或随黑潮平流向北。2003—2009年,仅有一例气旋涡能够引起黑潮主轴弯曲,穿过黑潮并到达南海北部的个例。但在该气旋涡中,仅4%的水质点跟随其进入南海,且其温盐特性在进入南海后迅速改变为南海局地特性,因此该气旋涡对南海北部海水团的性质影响非常有限。

英文摘要：

Using HYCOM global assimilation data and ARGO data,the difference of the water mass characteristics between the east and the west of the Luzon Strait is analyzed.Whether the eddies in the east of the Luzon strait can migrate through the Kuroshio and have impact on the north SCS（south China sea）is investigated.In climatological mean state,the temperature gradient across the Kuroshio is stronger in summer than that in winter.Through water mass analysis,the thermohaline characteristics on both sides of the Luzon strait are in significant difference,indicating that the thermohaline characteristics east of the Luzon strait could not be transported through the Strait and influence the north SCS.During the year 2003-2009（available HYCOM data period）,24 anticyclones are detected and none of them could travel through the Kuroshio.Among these anticyclones,most anticyclones migrated westward from north of 22°N and were moved northward by the advection of the Kuroshio.Anticyclones from south of 22°N tended to dissipate quickly after colliding into the Babuyan Islands.39 cyclones are detected and only one cyclone is observed to migrate through the Kuroshio and into the north SCS.Other cyclones detected tend to migrate from south of 21（N,dissipate near the Islands or travel northward with the Kuroshio.However,only 4% of the water mass passed through the Kuroshio with the cyclone,which means the impact of that cyclone on the thermohaline characteristics of the SCS is very limited.