Next Article in Journal
Comparison of Scanning LiDAR with Other Remote Sensing Measurements and Transport Model Predictions for a Saharan Dust Case
Next Article in Special Issue
Coastal Acoustic Tomography of the Neko-Seto Channel with a Focus on the Generation of Nonlinear Tidal Currents—Revisiting the First Experiment
Previous Article in Journal
Monsoon Effects on Chlorophyll-a, Sea Surface Temperature, and Ekman Dynamics Variability along the Southern Coast of Lesser Sunda Islands and Its Relation to ENSO and IOD Based on Satellite Observations
Previous Article in Special Issue
Numerical Simulation and Observational Data Analysis of Mesoscale Eddy Effects on Surface Waves in the South China Sea
 
 
Article

Diagnostics of Coherent Eddy Transport in the South China Sea Based on Satellite Observations

1
State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou 310000, China
2
State Key Laboratory of Tropical Oceanography, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510000, China
3
School of Environmental Sciences, University of East Anglia, Norwich NR4 7TJ, UK
4
Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519000, China
*
Author to whom correspondence should be addressed.
Academic Editors: Guoqi Han, Changming Dong, Chunyan Li and Jingsong Yang
Remote Sens. 2022, 14(7), 1690; https://doi.org/10.3390/rs14071690
Received: 3 February 2022 / Revised: 8 March 2022 / Accepted: 25 March 2022 / Published: 31 March 2022
The large discrepancy between Eulerian and Lagrangian work motivates us to examine the leakage of Eulerian eddies and quantify the contribution of coherent eddy transport in the South China Sea (SCS). In this study, Lagrangian particles with a resolution of 1/32° are advected by surface geostrophic currents derived from satellite observations spanning 23 years, and two types of methods are employed to identify sea surface height (SSH) eddies and Lagrangian coherent structures. SSH eddies are proven to be highly leaky during their lifetimes, with more than 80% of the original water leaking out of the eddy interior. As a result of zonal and meridional eddy propagation, the leaked water exhibits a spatial pattern of asymmetry relative to the eddy center. The degree of eddy leakage is found to be independent of several eddy parameters including the nonlinearity parameter U/c, which has been commonly used to assess eddy coherency. Finally, the Lagrangian coherent structures in the SCS are diagnosed and the associated coherent eddy diffusivity is calculated. It is found that coherent eddies contribute to less than 5% of the total eddy material transport in both zonal and meridional directions. These findings suggest that previous studies based on the Eulerian framework significantly overestimate the contribution of coherent eddy transport in the SCS. View Full-Text
Keywords: mesoscale eddies; coherent transport; eddy leakage; Lagrangian methods; South China Sea mesoscale eddies; coherent transport; eddy leakage; Lagrangian methods; South China Sea
Show Figures

Figure 1

MDPI and ACS Style

Liu, T.; He, Y.; Zhai, X.; Liu, X. Diagnostics of Coherent Eddy Transport in the South China Sea Based on Satellite Observations. Remote Sens. 2022, 14, 1690. https://doi.org/10.3390/rs14071690

AMA Style

Liu T, He Y, Zhai X, Liu X. Diagnostics of Coherent Eddy Transport in the South China Sea Based on Satellite Observations. Remote Sensing. 2022; 14(7):1690. https://doi.org/10.3390/rs14071690

Chicago/Turabian Style

Liu, Tongya, Yinghui He, Xiaoming Zhai, and Xiaohui Liu. 2022. "Diagnostics of Coherent Eddy Transport in the South China Sea Based on Satellite Observations" Remote Sensing 14, no. 7: 1690. https://doi.org/10.3390/rs14071690

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop