Seasonal characteristics and formation mechanism of the thermohaline structure of mesoscale eddy in the South China Sea

Zu Yongcan; Sun Shuangwen; Zhao Wei; Li Peiliang; Liu Baochao; Fang Yue; Samah Azizan Abu

doi:10.1007/s13131-018-1222-4

南海中尺度涡温盐结构的季节特征及形成机制

doi: 10.1007/s13131-018-1222-4

1.
中国海洋大学, 海洋与大气学院, 山东, 青岛 266100;自然资源部第一海洋研究所, 海洋与气候研究中心, 山东青岛 266061
2.
自然资源部第一海洋研究所, 海洋与气候研究中心, 山东青岛 266061;青岛海洋科学与技术试点国家实验室, 区域海洋动力学与数值模拟功能实验室, 山东青岛 266235
3.
中国海洋大学, 海洋与大气学院, 山东, 青岛 266100
4.
浙江大学, 海洋学院, 浙江, 舟山 316021
5.
自然资源部第一海洋研究所, 海洋与气候研究中心, 山东青岛 266061
6.
马来亚大学海洋与地球科学研究所, 马来西亚, 吉隆坡 50603

基金项目: The National Key R&D Program of China under contract No. 2017YFC1405100; the National Natural Science Foundation of China under contract Nos 41576028, 41306032 and 41876030; the NSFC-Shandong Joint Fund for Marine Science Research Centers under contract No. U1606405; the research fund from FIO-UM Joint Center of Marine Science and Technology.

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- 收稿日期: 2018-03-08

Seasonal characteristics and formation mechanism of the thermohaline structure of mesoscale eddy in the South China Sea

1.
College of Oceanic and Atmospheric Sciences, Ocean University of China, Qingdao 266100, China;Center for Ocean and Climate Research, First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China
2.
Center for Ocean and Climate Research, First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China;Laboratory for Regional Oceanography and Numerical Modeling, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China
3.
College of Oceanic and Atmospheric Sciences, Ocean University of China, Qingdao 266100, China
4.
Ocean College, Zhejiang University, Zhoushan 316021, China
5.
Center for Ocean and Climate Research, First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, China
6.
Institute of Ocean and Earth Sciences, University of Malaya, Kuala Lumpur 50603, Malaysia

摘要

摘要: 本文利用最新的涡旋数据集和ARMOR3D数据，研究了南海中尺度涡温盐结构的季节特征及形成机制。合成分析的结果表明，在冬季，涡旋引起温度异常的水平分布在50米以浅表现为类似偶极型分布，而在50m以深则趋向于中心对称分布；在夏季，温度异常的水平分布均表现为中心对称的特征。涡旋引起盐度异常的水平分布也具有类似的季节特征，但是偶极型中的不对称性相对较弱。在垂向上，涡旋所致的温度异常表现为单层结构，而盐度异常则为三层结构。进一步的分析表明，涡旋所致温盐异常的垂向分布特征与背景温盐的垂向分层有关；而在50m以浅，温盐异常的水平分布的不对称特征主要由背景温盐场的水平平流所致。
- 中尺度涡 /
- 温盐结构 /
- 季节特征 /
- 南海
Abstract: The seasonal characteristics and formation mechanism of the thermohaline structure of mesoscale eddy in the South China Sea are investigated using the latest eddy dataset and ARMOR3D data. Eddy-centric composites reveal that the horizontal distribution of temperature anomaly associated with eddy in winter is more of a dipole pattern in upper 50 m and tends to be centrosymmetric below 50 m, while in summer the distribution pattern is centrosymmetric in the entire water column. The horizontal distribution of eddy-induced salinity anomaly exhibits similar seasonal characteristics, except that the asymmetry of the salinity anomaly is weaker. The vertical distribution of temperature anomaly associated with eddy shows a monolayer structure, while the salinity anomaly demonstrates a triple-layer structure. Further analysis indicates that the vertical distribution of the anomalies is related to the vertical structure of background temperature and salinity fields, and the asymmetry of the anomalies in upper 50 m is mainly caused by the horizontal advection of background temperature and salinity.
- mesoscale eddy /
- thermohaline structure /
- seasonal characteristics /
- South China Sea

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参考文献(31)

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南海中尺度涡温盐结构的季节特征及形成机制

doi: 10.1007/s13131-018-1222-4

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Seasonal characteristics and formation mechanism of the thermohaline structure of mesoscale eddy in the South China Sea

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