白令海峡海域夏季温、盐分布及变化

根据 2 0 0 3年中国第二次北极科学考察资料 ,并结合历史现场调查资料和同期的海冰分布 ,分析了白令海峡及其周围海域的水体结构及变化情况 ,得到如下结论 :( 1 ) 2 0 0 3年夏季白令海峡区域层结构季节内变化显著 ,东西部呈两层结构 ,而中部上下水体均匀一致 ,( 2 )白令海峡邻近海域温盐结构是东部高温低盐 ,西部低温高盐 ,西部存在明显上升流特征 ;( 3)白令海峡的水交换以北太平洋水通过白令海峡进入北冰洋为主 ,而温度、盐度的分布也与北向的输运是匹配的。

DISTRIBUTION AND VARIATION OF TEMPERATUREAND SALINITY AROUND THE BERING STRAIT

Based on the conductivity-temperature-depth (CTD) data obtained near the Bering Strait by Chinese Second Arctic Research Expedition in Jul. and Sept., 2003 and historical data in Sept., 1988, gathered by NODC/NOAA, the water structure and distribution and variation of temperature and salinity are analyzed: (1)The water of the west and east part were stratification and there was strong thermocline in summer, 2003; besides in the center it was homogenize in vertical, there were strong horizontal front and the strength and position of the front was changed in July and Sept., 2003. (2)The warmer and fresh water was in the east and cooler and saline water occupied the west area, there was upwelling in the west; (3)The transport in the Bering Strait is northward mainly from the north Pacific Ocean to the Arctic Ocean, and distribution of temperature and salinity is matching with the northward transport.