Statistical analysis of mesoscale eddy propagation velocity in the South China Sea deep basin

2020 ◽  
Vol 39 (11) ◽  
pp. 91-102
Author(s):  
Runqi Huang ◽  
Lingling Xie ◽  
Quanan Zheng ◽  
Mingming Li ◽  
Peng Bai ◽  
...  
Keyword(s):  
Statistical Analysis ◽  
South China Sea ◽  
South China ◽  
Propagation Velocity ◽  
Mesoscale Eddy ◽  
The South China Sea ◽  
The South ◽  
Deep Basin ◽  
China Sea

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

2019 ◽  
Vol 38 (4) ◽  
pp. 29-38 ◽  
Author(s):  
Yongcan Zu ◽  
Shuangwen Sun ◽  
Wei Zhao ◽  
Peiliang Li ◽  
Baochao Liu ◽  
...  
Keyword(s):  
South China Sea ◽  
Formation Mechanism ◽  
South China ◽  
Mesoscale Eddy ◽  
The South China Sea ◽  
The South ◽  
Thermohaline Structure ◽  
China Sea ◽  
Seasonal Characteristics

scholarly journals Extraction of spatial-temporal rules from mesoscale eddies in the South China Sea based on rough set theory

Ocean Science ◽  
2011 ◽  
Vol 7 (6) ◽  
pp. 835-849 ◽  
Author(s):  
Y. Du ◽  
X. Fan ◽  
Z. He ◽  
F. Su ◽  
C. Zhou ◽  
...  
Keyword(s):  
South China Sea ◽  
Set Theory ◽  
Rough Set ◽  
South China ◽  
Rough Set Theory ◽  
Mesoscale Eddy ◽  
The South China Sea ◽  
The South ◽  
Long Distance ◽  
China Sea

Abstract. In this paper, a rough set theory is introduced to represent spatial-temporal relationships and extract the corresponding rules from typical mesoscale-eddy states in the South China Sea (SCS). Three decision attributes are adopted in this study, which make the approach flexible in retrieving spatial-temporal rules with different features. The results demonstrate that this approach is effective, and therefore provides a powerful approach to forecasts in the future studies. Spatial-temporal rules in the SCS indicate that warm eddies following the rules are generally in the southeastern and central SCS around 2000 m isobaths in winter. Their intensity and vorticity are weaker than those of cold eddies. They usually move a shorter distance. By contrast, cold eddies are in 2000 m and deeper regions of the southwestern and northeastern SCS in spring and fall. Their intensity and vorticity are strong. Usually they move a long distance. In winter, a few rules are followed by cold eddies in the northern tip of the basin and southwest of Taiwan Island rather than warm eddies, indicating cold eddies may be well-regulated in the region. Several warm-eddy rules are achieved west of Luzon Island, indicating warm eddies may be well-regulated in the region as well. Otherwise, warm and cold eddies are distributed not only in the jet flow off southern Vietnam induced by intraseasonal wind stress in summer-fall, but also in the northern shallow water, which should be a focus of a future study.

Derivation of internal solitary wave amplitude in the South China Sea deep basin from satellite images

2011 ◽  
Vol 67 (6) ◽  
pp. 689-697 ◽  
Author(s):  
Guan-Yu Chen ◽  
Feng-Chun Su ◽  
Chi-Mong Wang ◽  
Cho-Teng Liu ◽  
Ruo-Shan Tseng
Keyword(s):  
South China Sea ◽  
Solitary Wave ◽  
South China ◽  
Wave Amplitude ◽  
Satellite Images ◽  
The South China Sea ◽  
Internal Solitary Wave ◽  
The South ◽  
Deep Basin ◽  
China Sea

Comparison and Calibration of Elemental Measurements in Sediments Using X-Ray Fluorescence Core Scanning with ICP Methods: A Case Study of the South China Sea Deep Basin

2021 ◽  
Vol 20 (4) ◽  
pp. 848-856
Author(s):  
Fangjian Xu ◽  
Bangqi Hu ◽  
Chen Wang ◽  
Jingtao Zhao ◽  
Feifei Wang ◽  
...  
Keyword(s):  
South China Sea ◽  
South China ◽  
The South China Sea ◽  
The South ◽  
Deep Basin ◽  
X Ray ◽  
China Sea

scholarly journals The Generation and Evolution of Nonlinear Internal Waves in the Deep Basin of the South China Sea

2011 ◽  
Vol 41 (7) ◽  
pp. 1345-1363 ◽  
Author(s):  
Qiang Li ◽  
David M. Farmer
Keyword(s):  
South China Sea ◽  
Internal Waves ◽  
South China ◽  
Internal Tide ◽  
Luzon Strait ◽  
The South China Sea ◽  
The South ◽  
Deep Basin ◽  
Nonlinear Internal Waves ◽  
China Sea

Abstract Time series observations of nonlinear internal waves in the deep basin of the South China Sea are used to evaluate mechanisms for their generation and evolution. Internal tides are generated by tidal currents over ridges in Luzon Strait and steepen as they travel west, subsequently generating high-frequency nonlinear waves. Although nonlinear internal waves appear repeatedly on the western slopes of the South China Sea, their appearance in the deep basin is intermittent and more closely related to the amplitude of the semidiurnal than the predominant diurnal tidal current in Luzon Strait. As the internal tide propagates westward, it evolves under the influence of nonlinearity, rotation, and nonhydrostatic dispersion. The interaction between nonlinearity and rotation transforms the internal tide into a parabolic or corner shape. A fully nonlinear two-layer internal wave model explains the observed characteristics of internal tide evolution in the deep basin for different representative forcing conditions and allows assessment of differences between the fully and weakly nonlinear descriptions. Matching this model to a wave generation solution for representative topography in Luzon Strait leads to predictions in the deep basin consistent with observations. Separation of the eastern and western ridges is close to the internal semidiurnal tidal wavelength, contributing to intensification of the westward propagating semidiurnal component. Doppler effects of internal tide generation, when combined with a steady background flow, suggest an explanation for the apparent suppression of nonlinear wave generation during periods of westward intrusion of the Kuroshio.

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