Circulation and haline structure of a microtidal bay in the Sea of Japan influenced by the winter monsoon and the Tsushima Warm Current
Circulation and haline structure of a microtidal bay in the Sea of Japan influenced by the winter monsoon and the Tsushima Warm Current
复制标题
冬季季风和对马暖流影响下的日本海微潮湾环流和盐度结构
DOI：
10.1002/2015jc011441
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Y. Yamashita and Y. Watanabe
中科院分区：
文献类型：
--
作者：
Itoh;S.;A. Kasai;A. Takeshige;K.Zenimoto;S.Kimura;K.W. Suzuki;Y. Miyake;T. Funahashi;Y. Yamashita and Y. Watanabe
在日本海淡水影响微潮区（ROFI）探戈湾（Tango Bay）进行了系泊和水文测量，以阐明该海湾的环流格局及其驱动力。四个站点的月平均流速记录分别显示海湾东部和北部开口有流入和流出，表明海湾入口处有反气旋环流。冬季环流明显增强，与冬季季风盛行的西北风分量一致。海湾入口处的反气旋环流与河口环流相连，河口环流在海湾头的尤拉河口附近很明显。河口近岸表层盐度与雨拉河流量密切相关，而在较低层，近岸水体对盐度的影响更大。在雨拉河流量增加之前，夏季盐度在探戈湾水柱中明显下降，可能反映了对马暖流输送的长江稀释水的入侵。与传统的河口环流主要受河流流量和潮汐强迫控制的假设不同，探戈湾环流受季节性风和对马暖流的强烈影响。窄陆架可能是对马暖流对探戈湾环流和水交换过程产生强烈影响的原因。
Mooring and hydrographic surveys were conducted in Tango Bay, a microtidal region of freshwater influence (ROFI) in the Sea of Japan, in order to clarify the circulation pattern in the bay and its driving forces. Monthly mean velocity records at four stations revealed an inflow and outflow at the eastern and northern openings of the bay, respectively, indicating an anticyclonic circulation across the bay mouth. The circulation was significantly intensified in winter, in accordance with the prevailing NW wind component of the winter monsoon. The anticyclonic circulation at the bay mouth was connected to an estuarine circulation that was evident near the mouth of the Yura River at the bay head. Surface salinity just offshore of the river mouth was closely related to the Yura River discharge, whereas in lower layers the offshore water had a stronger influence on salinity. Prior to a seasonal increase in the Yura River discharge, summer salinity decreased markedly through the water column in Tango Bay, possibly reflecting intrusion of the Changjiang Diluted Water transported by the Tsushima Warm Current. In contrast with the traditional assumption that estuarine circulation is controlled mainly by river discharge and tidal forcing, the circulation in Tango Bay is strongly influenced by seasonal wind and the Tsushima Warm Current. The narrow shelf may be responsible for the strong influence of the Tsushima Warm Current on circulation and water exchange processes in Tango Bay.