南海中尺度涡温盐异常三维结构

谢旭丹; 王静; 储小青; 程旭华

doi:10.3969/j.issn.0253-4193.2018.04.001

南海中尺度涡温盐异常三维结构

doi: 10.3969/j.issn.0253-4193.2018.04.001

1.
中山大学地理科学与规划学院广东省城市化与地理空间模拟重点实验室, 广东广州 510275
2.
中国科学院南海海洋研究所热带海洋环境国家重点实验室, 广东广州 510301

基金项目: 国家自然基金项目（41276108，41676010，41476011，41522601，41276025）。

计量
- 文章访问数: 1002
- HTML全文浏览量: 20
- PDF下载量: 742
- 被引次数: 0
出版历程
- 收稿日期: 2017-03-15
- 修回日期: 2017-10-11

Three-dimensional thermohaline anomaly structures of mesoscale eddies in the South China Sea

1.
Guangdong Provincial Key Laboratory for Urbanization and Geo-simulation, School of Geography and Planning, Sun Yat-Sen University, Guangzhou 510275, China
2.
State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China

摘要

摘要: 基于1994-2015年海面高度异常数据，采用winding-angle中尺度涡旋探测算法识别出南海范围内共5 899个反气旋涡（AE）和3 792个气旋涡（CE），结合世界海洋数据集（WOD13）及中国科学院南海海洋研究所（SCSIO）温盐观测数据集，采用基于变分法的客观插值方法，合成了南海及南海各区域中尺度涡的温盐异常三维结构。结果表明，本文采取的插值方式能有效地获得涡旋三维结构，垂向尺度上也与前人研究结果较为一致。在平均状态下，南海AE温盐异常强度明显大于CE，AE正位温异常主体结构深度约440 m，而CE仅在320 m以浅维持涡旋结构；两者最大位温异常均出现在次表层约80 m上下，AE达2.02℃，CE达-1.60℃。盐度异常影响深度约150 m，最大盐度异常出现在50 m深附近，AE达-0.24，CE达0.28，同时由于涡旋在不单调变化的背景盐度场中引起海水下沉（上升），AE盐度异常结构呈"上负下正"而CE呈"上正下负"式结构。南海各区域合成涡旋的温、盐异常的影响程度并不完全相同，可能与各区域涡旋的生成机制及背景温盐场有关。
- 中尺度涡 /
- 温盐异常 /
- 合成涡旋 /
- 三维结构
Abstract: Used the Sea Level Anomaly data during 1994 to 2015, based on the winding-angle eddy detection algorithm, total of 5 899 anticyclonic eddies (AE) and 3 792 cyclonic eddies (CE) in the SCS are identified. With the profiles from the WOD13 and the SCSIO, the 3-D thermohaline anomaly structures are constructed in the SCS and its different area with the objective interpolation approach based on the variational analysis. The results show that the proposed revised interpolation approach can simulate the boundary of eddies effectively, and ensure the correct eddies shape. Generally speaking, AE's intensity are obviously stronger than CE's. AE maintain its main structure till approximately 440 m depth while CE only remain stable above 320 m. Both of the maximum potential temperature anomalies appear in about 80m depth, 2.02℃ for AE and -1.60℃ for CE. The affecting depth of salinity anomaly of eddies reach to 150 m depth around and the maximum anomalies induced by AE and CE are -0.24 and 0.28, respectively, which occur near the depth of 50 m. Meanwhile, the structure of salinity anomaly of AE seems to be positive on the top and negative on the bottom, just opposite to CE,which attributed to the sea water sinking (rising) induced by AE(CE). The temperature anomalies in each area of the SCS are not quite consistent with the salinity anomalies, which may attributed to the background thermohaline fields and different formation mechanism of eddies.
- mesoscale eddies /
- thermohaline anomaly /
- composite eddies /
- three-dimensional structures

HTML全文

参考文献(24)

Hwang Cheinway, Chen Sungan. Circulations and eddies over the South China Sea derived from TOPEX/Poseidon altimetry[J]. Journal of Geophysical Research Atmospheres, 2000, 105(C10):23943-23966.

Wang Guihua, Su Jilan, Peter C C. Mesoscale eddies in the South China Sea observed with altimeter data[J]. Geophysical Research Letters, 2003, 30(21):OCE 6-1-6-4.

程旭华, 齐义泉, 王卫强. 南海中尺度涡的季节和年际变化特征分析[J]. 热带海洋学报, 2005, 24(4):51-59. Cheng Xuhua, Qi Yiquan, Wang Weiqiang. Seasonal and interannual variabilities of mesoscale eddies in South China Sea[J]. Journal of Tropical Oceanography, 2005, 24(4):51-59.

Dong Changming, Lin Xiayan, Liu Yu, et al. Three-dimensional oceanic eddy analysis in the Southern California Bight from a numerical product[J]. Journal of Geophysical Research Oceans, 2012, 117(C7):92-99.

Lin Xiayan, Dong Changming, Chen Dake, et al. Three-dimensional properties of mesoscale eddies in the South China Sea based on eddy-resolving model output[J]. Deep-Sea Research Part Ⅰ:Oceanographic Research Papers, 2015, 99:46-64.

Chen Gengxin, Hou Yijun, Chu Xiaoqing. Mesoscale eddies in the South China Sea:Mean properties, spatiotemporal variability, and impact on thermohaline structure[J]. Journal of Geophysical Research Oceans, 2011, 116(C6):102-108.

Chen Gengxin, Hou Yijun, Chu Xiaoqing et al. Vertical structure and evolution of the Luzon Warm Eddy[J]. Chinese Journal of Oceanology and Limnology, 2010, 28(5):955-961.

Chen Gengxin, Hou Yijun, Zhang Qilong, et al. The eddy pair off eastern Vietnam:Interannual variability and impact on thermohaline structure[J]. Continental Shelf Research, 2010, 30(7):715-723.

Chu Xiaoqing, Xue Huijie, Qi Yiquan, et al. An exceptional anticyclonic eddy in the South China Sea in 2010[J]. Journal of Geophysical Research Oceans, 2014, 119(2):881-897.

Hu Jianyu, Gan Jianping, Sun Zhenyu, et al. Observed three-dimensional structure of a cold eddy in the southwestern South China Sea[J]. Journal of Geophysical Research Oceans, 2011, 116, C05016.

Zhang Zhiwei, Tian Jiwei, Qiu Bo, et al. Observed 3D structure, generation, and dissipation of oceanic mesoscale eddies in the South China Sea[J]. Scientific Reports, 2016, 6, doi: 10.1038/srep2434.

Chaigneau A, Texier M L, Eldin G, et al. Vertical structure of mesoscale eddies in the eastern South Pacific Ocean:A composite analysis from altimetry and Argo profiling floats[J]. Journal of Geophysical Research Atmospheres, 2011, 116(C11):C11025.

Yang Guang, Wang Fan, Li Yuanlong, et al. Mesoscale eddies in the northwestern subtropical Pacific Ocean:Statistical characteristics and three-dimensional structures[J]. Journal of Geophysical Research:Oceans, 2013, 118(4):1906-1925.

Liu Cong, Li Peiliang. The Impact of Meso-Scale Eddies on the Subtropical Mode Water in the Western North Pacific[J]. Journal of Ocean University of China, 2013, 12(2):230-236.

倪钦彪. 吕宋海峡附近中尺度涡的统计特征和复合三维结构[D]. 厦门:厦门大学, 2014. Ni Qinbiao. Statistical Characteristics and Composite Three-dimensional Structures of Mesoscale Eddies near the Luzon Strait[D]. Xiamen:Xiamen University, 2014.

Zhang Zhengguang, Zhang Yu, Wang Wei, et al. Universal structure of mesoscale eddies in the ocean[J]. Geophysical Research Letters, 2013, 40(14):3677-3681.

Zhang Zhengguang, Wang Wei, Qiu Bo. Oceanic mass transport by mesoscale eddies[J]. Science, 2014, 345(6194):322-324.

Sadarjoen I A, Post F H. Detection, quantification, and tracking of vortices using streamline geometry[J]. Computers & Graphics, 2000, 24(3):333-341.

Chaigneau A, Gizolme A, Grados C. Mesoscale eddies off Peru in altimeter records:Identification algorithms and eddy spatio-temporal patterns[J]. Progress in Oceanography, 2008, 79(2):106-119.

Chen Gengxin, Hou Yijun, Chu Xiaoqing, et al. The variability of eddy kinetic energy in the South China Sea deduced from satellite altimeter data[J]. Chinese Journal of Oceanology and Limnology, 2009, 27(4):943-954.

Chen Gengxin, Wang Dongxiao, Hou Yijun. The features and interannual variability mechanism of mesoscale eddies in the Bay of Bengal[J]. Continental Shelf Research, 2012, 47(10):178-185.

Barth A, Beckers J M, Troupin C, et al. Divand-1.0:n-dimensional variational data analysis for ocean observations[J]. Geoscientific Model Development Discussions, 2013, 7(1):225-241.

杨光. 西北太平洋中尺度涡旋研究[D]. 青岛:中国科学院海洋研究所, 2013. Yang Guang. A Study on the Mesoscale Eddies in the Northwestern Pacific Ocean[D]. Qingdao:Institute of Oceanology, Chinese Academy of Sciences, 2013.

Liu Qinyu, Jia Yinglai, Liu Penghui, et al. Seasonal and intraseasonal thermocline variability in the central south China Sea[J]. Geophysical Research Letters, 2001, 28(23):4467-4470.

施引文献

资源附件(0)

访问统计