Satellite observed shape-based overall rotation—A new aspect in eddy kinematics
With the development of satellite altimetry technology, the resolution of sea-level anomaly (SLA) datasets is constantly improving. Current spatial resolution levels can reach a grid size of (1/4)° × (1/4)°, with daily measurements that span from 1993 to 2018, allowing for the precise identification...
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| Veröffentlicht in: | Acta oceanologica Sinica 2022-05, Vol.41 (5), p.183-194 |
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| creator | Yang, Xueqing Han, Guiyan Ma, Chunyong Cao, Chuanchuan Yang, Jie Chen, Ge |
| description | With the development of satellite altimetry technology, the resolution of sea-level anomaly (SLA) datasets is constantly improving. Current spatial resolution levels can reach a grid size of (1/4)° × (1/4)°, with daily measurements that span from 1993 to 2018, allowing for the precise identification and tracking of individual eddies. In the current study, in addition to the internal circulation and migration of eddies, a new aspect in eddy kinematics is revealed and investigated for the first time: shape-based overall eddy rotation (SOER), based on the intrinsic elliptical shape of eddies identified from a high-resolution SLA dataset. We found that eddies can maintain an elliptical shape and a slow and stable SOER during their migration process. The SOER speed was observed to be negatively correlated to eddy lifetime, and exhibited a dependence on latitude, decreasing from low- and high- to mid-latitudes. The SOER direction tended to be consistent with the direction of internal circulation, particularly for long-lived eddies. In addition, we identified a negative relationship between internal circulation speed and SOER speed while the migration speed was positively related to SOER speed. These findings further expand and improve eddy kinematics, which is of great significance for the future study of eddy dynamics. |
| doi_str_mv | 10.1007/s13131-021-1970-4 |
| format | Article |
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Current spatial resolution levels can reach a grid size of (1/4)° × (1/4)°, with daily measurements that span from 1993 to 2018, allowing for the precise identification and tracking of individual eddies. In the current study, in addition to the internal circulation and migration of eddies, a new aspect in eddy kinematics is revealed and investigated for the first time: shape-based overall eddy rotation (SOER), based on the intrinsic elliptical shape of eddies identified from a high-resolution SLA dataset. We found that eddies can maintain an elliptical shape and a slow and stable SOER during their migration process. The SOER speed was observed to be negatively correlated to eddy lifetime, and exhibited a dependence on latitude, decreasing from low- and high- to mid-latitudes. The SOER direction tended to be consistent with the direction of internal circulation, particularly for long-lived eddies. In addition, we identified a negative relationship between internal circulation speed and SOER speed while the migration speed was positively related to SOER speed. These findings further expand and improve eddy kinematics, which is of great significance for the future study of eddy dynamics.</description><identifier>ISSN: 0253-505X</identifier><identifier>EISSN: 1869-1099</identifier><identifier>DOI: 10.1007/s13131-021-1970-4</identifier><language>eng</language><publisher>Berlin/Heidelberg: Springer Berlin Heidelberg</publisher><subject>Altimetry ; Climatology ; Datasets ; Direction ; Earth and Environmental Science ; Earth Sciences ; Ecology ; Eddies ; Engineering Fluid Dynamics ; Environmental Chemistry ; Identification ; Kinematics ; Marine & Freshwater Sciences ; Oceanography ; Resolution ; Rotation ; Satellite altimetry ; Satellite observation ; Sea level ; Sea level anomalies ; Shape ; Spatial discrimination ; Spatial resolution ; Tracking ; Vortices</subject><ispartof>Acta oceanologica Sinica, 2022-05, Vol.41 (5), p.183-194</ispartof><rights>Chinese Society for Oceanography and Springer-Verlag GmbH Germany, part of Springer Nature 2022</rights><rights>Chinese Society for Oceanography and Springer-Verlag GmbH Germany, part of Springer Nature 2022.</rights><rights>Copyright © Wanfang Data Co. 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All Rights Reserved.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c2216-5624738475ecda264d4acfa60d63c369a4537b23bb65d6878eb97ee112882f6b3</citedby><cites>FETCH-LOGICAL-c2216-5624738475ecda264d4acfa60d63c369a4537b23bb65d6878eb97ee112882f6b3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Uhttp://www.wanfangdata.com.cn/images/PeriodicalImages/hyxb-e/hyxb-e.jpg</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s13131-021-1970-4$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://www.proquest.com/docview/2919609866?pq-origsite=primo$$EHTML$$P50$$Gproquest$$H</linktohtml><link.rule.ids>314,776,780,21367,27901,27902,33721,41464,42533,43781,51294</link.rule.ids></links><search><creatorcontrib>Yang, Xueqing</creatorcontrib><creatorcontrib>Han, Guiyan</creatorcontrib><creatorcontrib>Ma, Chunyong</creatorcontrib><creatorcontrib>Cao, Chuanchuan</creatorcontrib><creatorcontrib>Yang, Jie</creatorcontrib><creatorcontrib>Chen, Ge</creatorcontrib><title>Satellite observed shape-based overall rotation—A new aspect in eddy kinematics</title><title>Acta oceanologica Sinica</title><addtitle>Acta Oceanol. Sin</addtitle><description>With the development of satellite altimetry technology, the resolution of sea-level anomaly (SLA) datasets is constantly improving. Current spatial resolution levels can reach a grid size of (1/4)° × (1/4)°, with daily measurements that span from 1993 to 2018, allowing for the precise identification and tracking of individual eddies. In the current study, in addition to the internal circulation and migration of eddies, a new aspect in eddy kinematics is revealed and investigated for the first time: shape-based overall eddy rotation (SOER), based on the intrinsic elliptical shape of eddies identified from a high-resolution SLA dataset. We found that eddies can maintain an elliptical shape and a slow and stable SOER during their migration process. The SOER speed was observed to be negatively correlated to eddy lifetime, and exhibited a dependence on latitude, decreasing from low- and high- to mid-latitudes. The SOER direction tended to be consistent with the direction of internal circulation, particularly for long-lived eddies. In addition, we identified a negative relationship between internal circulation speed and SOER speed while the migration speed was positively related to SOER speed. 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Sin</stitle><date>2022-05-01</date><risdate>2022</risdate><volume>41</volume><issue>5</issue><spage>183</spage><epage>194</epage><pages>183-194</pages><issn>0253-505X</issn><eissn>1869-1099</eissn><abstract>With the development of satellite altimetry technology, the resolution of sea-level anomaly (SLA) datasets is constantly improving. Current spatial resolution levels can reach a grid size of (1/4)° × (1/4)°, with daily measurements that span from 1993 to 2018, allowing for the precise identification and tracking of individual eddies. In the current study, in addition to the internal circulation and migration of eddies, a new aspect in eddy kinematics is revealed and investigated for the first time: shape-based overall eddy rotation (SOER), based on the intrinsic elliptical shape of eddies identified from a high-resolution SLA dataset. We found that eddies can maintain an elliptical shape and a slow and stable SOER during their migration process. The SOER speed was observed to be negatively correlated to eddy lifetime, and exhibited a dependence on latitude, decreasing from low- and high- to mid-latitudes. The SOER direction tended to be consistent with the direction of internal circulation, particularly for long-lived eddies. In addition, we identified a negative relationship between internal circulation speed and SOER speed while the migration speed was positively related to SOER speed. These findings further expand and improve eddy kinematics, which is of great significance for the future study of eddy dynamics.</abstract><cop>Berlin/Heidelberg</cop><pub>Springer Berlin Heidelberg</pub><doi>10.1007/s13131-021-1970-4</doi><tpages>12</tpages></addata></record> |
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| subjects | Altimetry Climatology Datasets Direction Earth and Environmental Science Earth Sciences Ecology Eddies Engineering Fluid Dynamics Environmental Chemistry Identification Kinematics Marine & Freshwater Sciences Oceanography Resolution Rotation Satellite altimetry Satellite observation Sea level Sea level anomalies Shape Spatial discrimination Spatial resolution Tracking Vortices |
| title | Satellite observed shape-based overall rotation—A new aspect in eddy kinematics |
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