CAJ | 학술논문

利用2009年12月6日至2010年1月5日在舟山海域获取的东海海域海床基定点（122.998oE，30.013oN）海流调查资料，应用调和分析与低通滤波方法，将海流分解为周期性的潮流分量与余流分量。对潮流的分布特征进行了分析，并构建了一个更加符合物理规律的局地坐标系，基于此坐标系着重分析了该海域余流的时间变化趋势和空间结构特征。分析结果表明，该站位垂向各层的潮流类型均为正规半日潮流，M2、S2分潮潮流椭圆长轴基本上呈南-北走向，各层表现出一定的旋转流特点，往复流特征并不显著。K1、O1分潮潮流椭圆主轴基本呈西北-东南走向，往复流特征显著。该站点的定常余流表现出明显的“上进下出”垂向空间结构。上层流速方向与中下层基本反向，明显呈现出两个不同流系的特征。统计结果显示，余流主轴呈西南-东北走向，大致与等深线走向一致。对逐时余流分析表明，该站点近表层余流以西南向为主，中下层水域则以东北向流动为主，应处于浙闽沿岸流与台湾暖流的交汇地带，西南向余流与浙闽沿岸流对应，而东北向余流则与台湾暖流对应。风对沿主轴方向余流的影响比垂直于主轴的余流显著。
이용2009년12월6일지2010년1월5일재주산해역획취적동해해역해상기정점（122.998oE，30.013oN）해류조사자료，응용조화분석여저통려파방법，장해류분해위주기성적조류분량여여류분량。대조류적분포특정진행료분석，병구건료일개경가부합물리규률적국지좌표계，기우차좌표계착중분석료해해역여류적시간변화추세화공간결구특정。분석결과표명，해참위수향각층적조류류형균위정규반일조류，M2、S2분조조류타원장축기본상정남-북주향，각층표현출일정적선전류특점，왕복류특정병불현저。K1、O1분조조류타원주축기본정서북-동남주향，왕복류특정현저。해참점적정상여류표현출명현적“상진하출”수향공간결구。상층류속방향여중하층기본반향，명현정현출량개불동류계적특정。통계결과현시，여류주축정서남-동북주향，대치여등심선주향일치。대축시여류분석표명，해참점근표층여류이서남향위주，중하층수역칙이동북향류동위주，응처우절민연안류여태만난류적교회지대，서남향여류여절민연안류대응，이동북향여류칙여태만난류대응。풍대연주축방향여류적영향비수직우주축적여류현저。
Based on the current observations at a mooring station (122.998oE, 30.013oN) near the Zhoushan Islands from December 6, 2009 to January 5, 2010 and using the methods of Tide Current Harmonic and Low Pass Filter, this paper decomposed the current into cyclical trend component and residual current component and constructed a new local coordinate system with the laws of physics. The residual current component and its structure characteristics were analyzed. The results showed that regular semidiurnal tide dominated the current movement at every layer. The steady residual current displayed significant character of ‘double track’ with opposite direction between upper and lower- middle layer, which obviously presented the characteristics of two different streams. Statistics showed that the spindle of residual current with a southwest-northeast direction was roughly consistent with the trend of the isobath. Results of hourly steady residual current showed that the station should locate in the sea area connecting with Zhemin coastal water and TWC. Wind significantly affected the residual current along the isobath more obviously than the vertical direction.