Surface current structure of the Tsushima Warm Current region in the Japan Sea derived by satellite-tracked surface drifters
Surface current structure of the Tsushima Warm Current region in the Japan Sea derived by satellite-tracked surface drifters
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由卫星跟踪的表面漂流物得出的日本海对马暖流区域的表面流结构
DOI：
10.1007/s10872-009-0066-0
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发表时间：
2009
影响因子：
2.3
通讯作者：
O. Katoh
中科院分区：
文献类型：
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作者：
Tatsuro Watanabe;D. Simizu;Kou Nishiuchi;Toru Hasegawa;O. Katoh
我们根据卫星跟踪表面漂流器的数据集（包括我们在 2004 年至 2008 年期间的新部署）检查了日本海对马暖流 (TWC) 区域的表面流结构。根据所有可用的漂流数据计算出的网格平均流速和平均动能 (KE) 场揭示了 TWC 三个分支的结构和季节性。通过比较涡动能 (EKE) 场与 KE 场，我们发现了 EKE 与 KE 比率较高的四个区域。特别是，位于TWC第一分支（FBTWC）和TWC第二分支（SBTWC）之间的奥基群岛以东，该比率变得极高。我们的分析表明，奥基岛以东冷暖涡流交替的产生导致了如此高的比率。暖涡或冷涡的发生与 SBTWC 的近岸或近海航线有关。当SBTWC的近海路线占据主导地位时，奥基群岛以东经常产生暖涡流。相比之下，当SBTWC的近岸路线占主导地位时，更有可能产生冷涡。
We examined the surface current structure in the Tsushima Warm Current (TWC) region of the Japan Sea based on a dataset from satellite-tracked surface drifters, including our new deployments during 2004–2008. The gridded mean current velocity and mean kinetic energy (KE) fields calculated from all available drifter data revealed the structure and seasonality of the three branches of the TWC. By comparing the eddy kinetic energy (EKE) field to the KE field, we found four regions where the ratio of EKE to KE was high. In particular, this ratio became extremely high east of the Oki Islands located between the first branch of the TWC (FBTWC) and the second branch of the TWC (SBTWC). Our analysis suggests that the generation of alternate warm and cold eddies east of the Oki Island induced this high ratio. The occurrence of a warm or cold eddy was related to the route—either nearshore or offshore—of the SBTWC. When the offshore route of the SBTWC became dominant, a warm eddy was frequently generated east of the Oki Islands. In contrast, when the nearshore route of the SBTWC became dominant, a cold eddy was more likely to be generated.
DOI：
--
发表时间：
2006
期刊：
J. Oceanography 62 (in press)
影响因子：
--
作者：
Yongjum Tian;Naoki Iguchi;Tatsuro Watanabe
通讯作者：
Tatsuro Watanabe