2015年6月南海北部陆坡气旋-反气旋涡对陆坡水文和环流影响的观测

发布时间：2018-03-11 21:51

本文选题：南海北部　切入点：陆坡　出处：《海洋学研究》2016年04期 　论文类型：期刊论文

【摘要】：利用2015年6月南海北部现场观测的水文数据,结合卫星高度计资料,分析了2015年6月13日—28日南海北部陆坡在气旋涡-反气旋涡的双涡结构影响下的水文和环流特征。结果表明,2015年6月南海北部陆坡调查海区表层50m以浅盐度存在NE—SW向低盐区,表层盐度最小值低于32,这表明南海北部陆坡存在跨陆架海水输送。在观测期间,南海北部陆坡调查海区受气旋涡和反气旋涡双涡结构影响,使得南海北部陆坡表层100m以浅存在跨陆坡流,流速最大值出现在两涡交汇区域。此外,通过潜标连续海流资料,发现南海北部陆坡环流呈现了"深入浅出"(100m以深层为向岸的入侵、以浅层为离岸的出流)的"两层结构"。
[Abstract]:Based on the hydrological data observed in the northern part of the South China Sea in June 2015 and the satellite altimeter data, The hydrological and circulation characteristics of the northern slope of the South China Sea from June 13th 2015 to 28th under the influence of the double vortex-counter-vortex structure are analyzed. The results show that the surface layer of the survey area in the northern slope of the South China Sea in June 2015 has a NE-SW low salt area with shallow salinity. The minimum value of surface salinity is less than 32, which indicates that there is sea water transport across the continental shelf on the northern slope of the South China Sea. During the observation period, the investigation area of the northern slope of the South China Sea is affected by the double vortex structure of the gas vortex and the countercurrent vortex. As a result, the surface layer of the northern slope of the South China Sea is 100 m shallow, and the maximum velocity appears in the region where the two vortices meet. In addition, the continuous current data of the submarkage are used. It is found that the circulation on the northern slope of the South China Sea presents a "two-layer structure" of the "deep and shallow" 100 m intrusion with the deep layer as the shore and the shallow layer as the offshore current.
【作者单位】：卫星海洋环境动力学国家重点实验室;国家海洋局第二海洋研究所;
【基金】：国家重点基础研究发展计划(“973”计划)项目资助(2014CB441501) 国家自然科学基金项目资助(41406021) 国家重点研发计划重点专项项目资助(2016YFC0304105) 卫星海洋环境动力学国家重点实验室自主课题资助(SOEDZZ1505)
【分类号】：P731.2;P732.6

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