渤海南部沿岸水运移及渤黄海水体交换的季节变化  

Seasonal Variation of Coastal Water Movement in the Southern Bohai Sea and Water Exchange Between the Bohai Sea and the Yellow Sea

作　　者：张志欣[1,2] 乔方利[1,2] 郭景松[1,2] 于非[3] 

机构地区：[1]国家海洋局第一海洋研究所,山东青岛266061 [2]海洋环境科学与数值模拟国家海洋局重点实验室,山东青岛266061 [3]中国科学院海洋研究所,山东青岛266071

出　　处：《海洋科学进展》2010年第2期142-148,共7页Advances in Marine Science

基　　金：海洋公益性行业科研专项--渤海典型区域的海洋多过程数据整合研究(200705027);国家重点基础研究发展计划项目--中国东部陆架边缘海海洋物理环境演变及其环境效应(2005CB422303)

摘　　要：针对渤海及附近海区的曲折岸线变化以及水文资料时空分布不均匀性的特点,使用四维客观分析LOESS方法得到逐月气候态盐度场。结果表明:渤海南部沿岸水扩展和运移受季风影响显著。冬季沿岸水向渤海湾和莱州湾堆积,形成沿山东半岛龙口海岸东向爬行的水舌,该水舌在蓬莱水域向东扩展;夏季沿岸水向渤海中部冲溢,特别是在黄河口附近,其核心区厚度可达8 m,可扩展到119°30′E处,同时莱州湾内的沿岸水向湾内西部收缩。冬季渤海海峡呈现显著"北进南出"水交换态势;夏季渤海海峡定常流方式的水交换特征不明显。The coastal tortuosity and the inhomogeneity of the spatial-temporal distribution of the hydrographic data in the Bohai Sea and its adjacent area are considered and LOESS for the 4-dimensional obiective analysis is employed to obtain the monthly climatological salinity fields. It is shown in the analysis results that the coastal water movement and extension in the southern Bohai Sea are significantly effected by mon- soon. The coastal water is cumulated in the Bohai Bay and the Laizhou Bay, thus forming a low-salinity water tongue extending eastward along the coast at Longkou of Shandong Penisula and further toward the east of Penglai in winter. The low-salinity water turns to drift and cumulate toward the central Bohai Sea, especially in the water area adjacent to the Yellow River Estuary where its core of low salinity is as thick as 8 m, and as far as 119°30′E in summer. At the same time, the coastal water in the Laizhou becomes west- ward shrunk. The water exchange in winter is significantly characterized by a pattern of ＂the inflow in the south and outflow in the north of the Bohai Strait＂. The water exchange in summer does not have significant features of stable flow pattern.

关 键 词：沿岸水 渤海 水交换 

分 类 号：P731[天文地球—海洋科学] P722.4