Seasonal Variation of Soya Current.
Seasonal Variation of Soya Current.
复制标题
大豆海流的季节变化。
DOI：
10.5928/kaiyou.8.333
复制
发表时间：
1999
期刊：
影响因子：
--
通讯作者：
S. Matsuyama
中科院分区：
文献类型：
--
作者：
M. Matsuyama;M. Aota;I. Ogasawara;S. Matsuyama
鄂霍次克海北海道沿岸大豆洋流的季节变化是通过猿府附近系泊站获得的长期洋流记录和北海道沿岸潮汐站的调整海平面记录进行调查的。目前的记录显示出显着的季节变化，即夏季强，冬季弱。海流变化与日本海与鄂霍次克海海平面高差密切相关，而冬季海流弱则与两海海平面差较小有关。这一事实在很大程度上取决于鄂霍次克海北海道沿岸海平面的独特季节性变化，即冬季最高，春季最低。冬季的高海平面是由鄂霍次克海南部地下层的低盐度水保持的（Ito，1997），并沿北海道南部海岸发现。冬季鄂霍次克海北海道沿岸海平面的年际变化与季风指数（MOI）变化相关，该指数定义为俄罗斯伊尔库茨克和北海道根室之间的大气压力差。
Seasonal variation of Soya Current along the Hokkaido coast in the Sea of Okhotsk was investigated both by the long-term current record obtained at the moored station off Sarufutsu and adjusted sea level record at the tidal stations along the Hokkaido coast. The current record shows significant seasonal variation, i.e., strong in summer and weak in winter. The current variation is closely correlated with the sea level difference between by high sea level in the Japan Sea compared with that in Sea of Okhotsk, while the weak current in winter is due to small difference of the sea level between both seas. This fact strongly depends on the unique seasonal variation of the sea level along the Hokkaido coast in the Sea of Okhotsk, i.e., maximum in winter and minimum in spring. The high sea level in winter is retained by the low salinity water in the subsurface layer of the southern part of the Sea of Okhotsk (Ito, 1997) and found along the southern coast of Hokkaido. The interannual variation of sea level along the Hokkaido coast in the Sea of Okhotsk in winter correlates with the Monsoon-Index (MOI) variation defined as difference of atmosphere pressure between Irkutsk in Russia and Nemuro in Hokkaido.