渤海夏季底层环流的观测与模拟  

The Observation and Simulation of Bottom Circulation in the Bohai Sea in Summer

作　　者：江文胜[1] 吴德星[1] 高会旺[2] 

机构地区：[1]青岛海洋大学物理海洋实验室,物理海洋研究所,青岛266003 [2]青岛海洋大学环境科学与工程学院,青岛266003

出　　处：《青岛海洋大学学报（自然科学版）》2002年第4期511-518,共8页Journal of Ocean University of Qingdao

基　　金：国家重点基础研究发展规划项目 (G19990 4 380 4 )

摘　　要：通过分析用人工水母在渤海夏季进行的首次底层环流的 L agrange观测 ,发现在渤海底层 Lagrange余流只有几 cm/s,在海峡处基本是北进南出的情况 ,在辽东湾有 1个逆时针的环流 ,在渤海湾有 1个顺时针的环流。但是进一步分析发现 ,底层人工水母的运移 (代表了物质输运 )并不完全反映环流的方向 ,在有些站位甚至出现相反的趋势。通过数值模拟知道瞬时的扩散及沉降等过程是产生这种结果的原因 ,而根源在于环流场的不均匀性。The first Lagrangian observation of bottom circulation in the Bohai Sea in Summer by deploying artificial jellyfish is discussed. The results show that the bottom Lagrangian residual currents in the Bohai Sea are only several cm/s, which flows in through the northern part of the Bohai Strait and flows out through the southern part. There is an anticlockwise circulation in the Liaodong Bay and a clockwise circulation in the Bohai Bay. Further analysis shows that the movement of the artificial jellyfish (represents the mass transport) does not always represent the circulation. At some stations they are in the opposite directions. Numerical simulations are carried out to show that these phenomena are caused by instantaneous diffusion and sinking processes. The main reason is the inhomogeneity of the circulation field.

关 键 词：夏季 底层环流 余流 渤海 人工水母 数值模拟 

分 类 号：P731.27[天文地球—海洋科学]