Mesoscale Eddy Properties in Four Major Western Boundary Current Regions
Oceanic mesoscale eddies are a kind of typical geostrophic dynamic process which can cause vertical movement in water bodies, thereby changing the temperature, salinity, density, and chlorophyll concentration of the surface water in the eddy. Based on multisource remote sensing data and Argo profile...
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MDPI AG
2024-11-01
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| author | Wei Cui Jungang Yang Chaojie Zhou |
| author_facet | Wei Cui Jungang Yang Chaojie Zhou |
| author_sort | Wei Cui |
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| description | Oceanic mesoscale eddies are a kind of typical geostrophic dynamic process which can cause vertical movement in water bodies, thereby changing the temperature, salinity, density, and chlorophyll concentration of the surface water in the eddy. Based on multisource remote sensing data and Argo profiles, this study analyzes and compares the mesoscale eddy properties in four major western boundary current regions (WBCs), i.e., the Kuroshio Extension (KE), the Gulf Stream (GS), the Agulhas Current (AC), and the Brazil Current (BC). The 30-year sea surface height anomaly (SSHA) data are used to identify mesoscale eddies in the four WBCs. Among the four WBCs, the GS eddies have the largest amplitude and the BC eddies have the smallest amplitude. Combining the altimeter-detected eddy results with the simultaneous observations of sea surface temperature, sea surface salinity, sea surface density, and chlorophyll concentration, the local impacts of eddy activities in each WBCs are analyzed. The eddy surface temperature and salinity signals are positively correlated with the eddy SSHA signals, while the eddy surface density and chlorophyll concentrations are negatively correlated with eddy SSHA signals. The correlation analysis of eddy surface signals in the WBCs reveals that eddies have regional differences in the surface signal changes of eddy activities. Based on the subsurface temperature and salinity information provided by Argo profiles, the analysis of the vertical thermohaline characteristics of mesoscale eddies in the four WBCs is carried out. Eddies in the four WBCs have deep influence on the vertical thermohaline characteristics of water masses, which is not only related to the strong eddy activities but also to the thick thermocline and halocline of water masses in the WBCs. |
| format | Article |
| id | doaj-art-7bedb5b504a64535bdfd5f4f6479382c |
| institution | Kabale University |
| issn | 2072-4292 |
| language | English |
| publishDate | 2024-11-01 |
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| spelling | doaj-art-7bedb5b504a64535bdfd5f4f6479382c2024-12-13T16:30:58ZengMDPI AGRemote Sensing2072-42922024-11-011623447010.3390/rs16234470Mesoscale Eddy Properties in Four Major Western Boundary Current RegionsWei Cui0Jungang Yang1Chaojie Zhou2First Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, ChinaFirst Institute of Oceanography, Ministry of Natural Resources, Qingdao 266061, ChinaHainan Institute of Zhejiang University, Sanya 572024, ChinaOceanic mesoscale eddies are a kind of typical geostrophic dynamic process which can cause vertical movement in water bodies, thereby changing the temperature, salinity, density, and chlorophyll concentration of the surface water in the eddy. Based on multisource remote sensing data and Argo profiles, this study analyzes and compares the mesoscale eddy properties in four major western boundary current regions (WBCs), i.e., the Kuroshio Extension (KE), the Gulf Stream (GS), the Agulhas Current (AC), and the Brazil Current (BC). The 30-year sea surface height anomaly (SSHA) data are used to identify mesoscale eddies in the four WBCs. Among the four WBCs, the GS eddies have the largest amplitude and the BC eddies have the smallest amplitude. Combining the altimeter-detected eddy results with the simultaneous observations of sea surface temperature, sea surface salinity, sea surface density, and chlorophyll concentration, the local impacts of eddy activities in each WBCs are analyzed. The eddy surface temperature and salinity signals are positively correlated with the eddy SSHA signals, while the eddy surface density and chlorophyll concentrations are negatively correlated with eddy SSHA signals. The correlation analysis of eddy surface signals in the WBCs reveals that eddies have regional differences in the surface signal changes of eddy activities. Based on the subsurface temperature and salinity information provided by Argo profiles, the analysis of the vertical thermohaline characteristics of mesoscale eddies in the four WBCs is carried out. Eddies in the four WBCs have deep influence on the vertical thermohaline characteristics of water masses, which is not only related to the strong eddy activities but also to the thick thermocline and halocline of water masses in the WBCs.https://www.mdpi.com/2072-4292/16/23/4470mesoscale eddyeddy propertywestern boundary currentremote sensingsatellite altimetryArgo |
| spellingShingle | Wei Cui Jungang Yang Chaojie Zhou Mesoscale Eddy Properties in Four Major Western Boundary Current Regions Remote Sensing mesoscale eddy eddy property western boundary current remote sensing satellite altimetry Argo |
| title | Mesoscale Eddy Properties in Four Major Western Boundary Current Regions |
| title_full | Mesoscale Eddy Properties in Four Major Western Boundary Current Regions |
| title_fullStr | Mesoscale Eddy Properties in Four Major Western Boundary Current Regions |
| title_full_unstemmed | Mesoscale Eddy Properties in Four Major Western Boundary Current Regions |
| title_short | Mesoscale Eddy Properties in Four Major Western Boundary Current Regions |
| title_sort | mesoscale eddy properties in four major western boundary current regions |
| topic | mesoscale eddy eddy property western boundary current remote sensing satellite altimetry Argo |
| url | https://www.mdpi.com/2072-4292/16/23/4470 |
| work_keys_str_mv | AT weicui mesoscaleeddypropertiesinfourmajorwesternboundarycurrentregions AT jungangyang mesoscaleeddypropertiesinfourmajorwesternboundarycurrentregions AT chaojiezhou mesoscaleeddypropertiesinfourmajorwesternboundarycurrentregions |