| Zhu Jia,Zheng Quanan,Hu Jianyu,Lin Hongyang,Chen Dewen,Chen Zhaozhang,Sun Zhenyu,Li Liyan,Kong Hao. 2019. Classification and 3-D distribution of upper layer water masses in the northern South China Sea. Acta Oceanologica Sinica, 38(4):126－135 |
| Classification and 3-D distribution of upper layer water masses in the northern South China Sea |
| 关于南海北部上层水团的分类及三维分布的研究 |
| Received:February 10, 2018 |
| DOI：10.1007/s13131-019-1418-2 |
| Key words:water mass classification northern South China Sea fuzzy cluster analysis T-S similarity number |
| 中文关键词: 水团分类 南海北部 模糊聚类分析 T-S相似度 |
| 基金项目:The National Natural Science Foundation of China under contract No. 41776027; the National Basic Research Program of China under contract Nos 2015CB954004 and 2009CB421208; the Open Fund of the Key Laboratory of Ocean Circulation and Waves, Chinese Academy of Sciences under contract No. KLOCW1808. |
| Author Name | Affiliation | E-mail | | Zhu Jia | State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China | | | Zheng Quanan | Department of Atmospheric and Oceanic Science, University of Maryland, College Park, Maryland 20742, USA | | | Hu Jianyu | State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China | hujy@xmu.edu.cn | | Lin Hongyang | State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China | | | Chen Dewen | Marine Forecast Station of Xiamen, State Oceanic Administration, Xiamen 361012, China | | | Chen Zhaozhang | State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China | | | Sun Zhenyu | State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China | | | Li Liyan | State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China | | | Kong Hao | Fujian Provincial Key Laboratory of Coast and Island Management Technology, Fujian Institute of Oceanography, Xiamen 361013, China | |
|
| Hits: 1441 |
| Download times: 1066 |
| Abstract: |
| Using the fuzzy cluster analysis and the temperature-salinity (T-S) similarity number analysis of cruise conductivity-temperature-depth (CTD) data in the upper layer (0-300 m) of the northern South China Sea (NSCS), we classify the upper layer water of the NSCS into six water masses:diluted water (D), surface water (SS), the SCS subsurface water mass (US), the Pacific Ocean subsurface water mass (UP), surface-subsurface mixed water (SU) and subsurface-intermediate mixed water (UI). A new stacked stereogram is used to illustrate the water mass distribution, and to examine the source and the distribution of UP, combining with the sea surface height data and geostrophic current field. The results show that water mass UP exists in all four seasons with the maximum range in spring and the minimum range in summer. In spring and winter, the UP intrudes into the Luzon Strait and the southwest of Taiwan Island via the northern Luzon Strait in the form of nonlinear Rossby eddies, and forms a high temperature and high salinity zone east of the Dongsha Islands. In summer, the UP is sporadically distributed in the study area. In autumn, the UP is located in the upper 200 m layer east of Hainan Island. |
| 中文摘要: |
| 基于南海北部春、夏、秋、冬季四个航次300m以浅的CTD温、盐数据，通过模糊聚类法将南海北部上层水体划分为冲淡水、表层水、次表层水、表层-次表层混合水、次表层-中层混合水五个水团。而后提出T-S水体相似度法，将次表层水细划分为南海次表层水和太平洋次表层水，并采用层叠3D立体图绘制六个水团的分布。此外，结合航次期间的绝对海面高度和地转流场讨论了太平洋次表层水的来源和分布。研究结果表明：太平洋次表层水在四季均可见。在春季分布范围最大，冬季和秋季次之，夏季最小。春季和冬季主要分布在台湾岛西南角和吕宋海峡，并随脉冲式非线性Rossby eddy经吕宋海峡北部进入调查海域中部，呈不连续的涡旋状分布，在东沙群岛东侧形成一个高温高盐区。夏季太平洋次表层水在调查海域仅呈现零星分布，秋季分布在海南岛东部的200m层。 |
|
HTML
View Full Text
View/Add Comment Download reader |
| Close |
|
|
|
