The Tsushima warm current through Tsushima Straits estimated from ferryboat ADCP data
The Tsushima warm current through Tsushima Straits estimated from ferryboat ADCP data
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DOI：
10.1175/jpo2742.1
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发表时间：
2005-06-01
影响因子：
3.5
通讯作者：
Cho, KD
中科院分区：
文献类型：
--
作者：
Takikawa, T;Yoon, JH;Cho, KD
利用1997年2月以来博多和釜山之间的渡船进行的长期声学多普勒海流剖面仪(ADCP)观测结果，研究了对马海峡的海流结构。在东、西航道的中部观测到两个东北向海流极大值，且西航道的最大流速比东航道强。在对马群岛下游，观察到西南逆流与一对气旋和反气旋涡流相关。在西部水道，从夏季到冬季，在朝鲜一侧的底部斜坡上可以观察到明显的深层逆流。对马暖流通过海峡的输送量具有较强的季节变化，一月份有一个最小值，春至秋季有两个最大值（双峰）。东部通道货量运输春季高峰较秋季高峰明显，西部通道秋季高峰较春季高峰明显。由于淡水输送量的增加，秋季通过西部航道进入日本海的流入量显着增加。观测期间（5.5 年）的平均总体积传输为 2.64 Sv (Sv = 10(6) m(3) s(-1))。东、西航道的平均运输量分别为1.10和1.54希沃特。
Current structures across the Tsushima Straits are studied using results from long-term acoustic Doppler current profiler (ADCP) observations by a ferryboat between Hakata and Pusan conducted since February 1997. Two maxima of the northeastward current are observed in the central parts of the eastern and western channels, and the maximum velocity in the western channel is stronger than that of the eastern channel. Downstream of the Tsushima Islands, a southwestward countercurrent is observed associated with a pair of cyclonic and anticyclonic eddies. In the western channel, the deep countercurrent is observed pronouncedly on the bottom slope of the Korean side from summer to winter. The volume transport of the Tsushima Warm Current through the straits has strong seasonal variation with a minimum in January and two maxima from spring to autumn (double peaks). The spring peak of the volume transport through the eastern channel is more pronounced than the autumn peak, and the autumn peak of the western channel is more pronounced than the spring peak. The inflow volume transport into the Japan Sea through the western channel significantly increases in autumn because of an incrementation of the freshwater transport. The total volume transport averaged over the observation period (5.5 yr) is 2.64 Sv (Sv = 10(6) m(3) s(-1)). The average volume transports through the eastern and western channels are 1.10 and 1.54 Sv, respectively.