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南黄海及东海北部夏季若干水文特征和环流的分析 预览 被引量:40

AN ANALYSIS OF SUMMER HYDROGRAPHIC FEATURES AND CIRCULATION IN THE SOUTHERN YELLOW SEA AND THE NORTHERN EAST CHINA SEA
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摘要 利用“中韩黄海水循环动力学合作研究”1997年7月航次和“黄海综合环境调查”1998年8月航次观测所所得CTD资料,对南海及东海并部夏季的水文特征和特大洪水年长江冲淡水扩展特征进行探讨,同时带根据夏季所施放的卫星跟踪漂流浮标的轨迹,底层人工水母的移路径及等密面积深度的分布对夏季环流作了阐述,提出夏季黄海环流并非单一的气旋式系统,其内部还存在着气旋,反气旋的多个较小的环流,东海北部交替地出现气旋,反气旋涡旋。 Summer hydrographic features and the extension of the Changjiang River Diluted Water in the southern Yellow Sea and northern East China Sea are described, based on the CTD data measured in summer cruise (July 1997) of “PRC Korea Joint Investigation of Ocean Circulation Dynamics in the southern Yellow Sea” and that (August 1998) of “Comprehensive Hydrographic Investigation in Continental Shelf of the Yellow and the East China Seas”. Analyses show that there are several cold water areas induced by tidal mixing near shore in summer,which is one of the outstanding features in the Yellow Sea. The satellite infrared imagery on the July 28 of 1998 demonstrated the belt of cold water coincided completely with topography near the edge of Subei shallow shoal and it also shows radiated stripes with low temperature alternatively,which implies that the upwelling cold water near the Subei shallow shoal is totally caused by tidal mixing. Changjiang River Diluted Water is another surface important feature in summer. The Changjiang River runoff from the river mouth flowed southeastward firstly,and then turned to northeast at about 31°N,122°30′E toward the direction of Chejudao to form a distinct fresh water tongue which almost extended through to Chejudao in the high flooding year of 1998. According to the in situ CTD observed data from the August of 1998 and the analysis of historical data,the authors suggested that the extension of Changjiang River Diluted Water could be summarized into three stages after it flows into the sea,i.e. turning,extending and transmitting stages. \;In the meantime,the summer circulation is also depicted in this paper,based on the satellite drifter buoy trajectories deployed in summer,the bottom drifter trajectories in the July of 1997 and the distribution of depth at 23.0m isopycnal in the August of 1998. The results show that one part of coastal currents near the Subei shallow shoal flow southeastward along the 40\_50m isobath,and then turns by east flowing into the East China Sea at a
作者 邹娥梅 李载学 ZOU E Mei,\ GUO Bing Huo,\ TANG Yu Xiang (Key Laboratory of Marine Science and Numerical Modeling,State Oceanic Administration; First Institute of Oceanography,State Oceanic Administration,Qingdao,266003) Jae Hak Lee,\ Heung Jae Lie (Korea Ocean Re
出处 《海洋与湖沼》 CAS CSCD 北大核心 2001年第3期 340-348,共9页 Oceanologia Et Limnologia Sinica
基金 国家自然科学基金!资助项目 4 96762 83号
关键词 黄海 东海 水文特征 潮致冷水域 气旋 环流 涡旋 漂流浮标 Southern Yellow Sea,The northern East China Sea,Hydrographic feature, Cold water induced by tidal mixing,Circulation,Gyre
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