Vortices of the Mediterranean Sea : An altimetric perspective
The presence of coherent vortices makes observed mesoscale fields of the ocean resemble two-dimensional turbulence. Using this analogy, a common definition of a coherent structure has been used to study the statistical properties of Mediterranean Sea vortices observed by satellite altimeters over a...
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| Veröffentlicht in: | Journal of physical oceanography 2006, Vol.36 (1), p.87-103 |
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| creator | ISERN-FONTANET, Jordi GARCIA-LADONA, Emilio FONT, Jordi |
| description | The presence of coherent vortices makes observed mesoscale fields of the ocean resemble two-dimensional turbulence. Using this analogy, a common definition of a coherent structure has been used to study the statistical properties of Mediterranean Sea vortices observed by satellite altimeters over a 7-yr period. A vortex has been defined as the simply connected region with values of the Okubo–Weiss parameter W < −0.2σW, where σW is the spatial standard deviation of W, and the same sign of vorticity. This definition is shown to be appropriate to detect and characterize, statistically, properties such as size, mean kinetic energy, and amplitude of vortices in the Mediterranean basin from sea level anomaly maps corresponding to the period from October 1992 to October 1999. The distribution of such properties for the Mediterranean vortices suggests a heuristic criterion to extract and select very coherent and long-lived vortices from the whole set of structures identified in altimetric maps. Such coherent vortices appear to be selected for amplitudes greater than 2σW, where the amplitude has been defined in terms of the Okubo–Weiss parameter rather than vorticity, and strongly correspond to those reported from observations with independent data. Systematic locating and tracking of such vortices provide, for the first time, a general picture of their preferential paths in the Mediterranean basin, which are characterized by complex but rather well defined patterns. |
| doi_str_mv | 10.1175/jpo2826.1 |
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Using this analogy, a common definition of a coherent structure has been used to study the statistical properties of Mediterranean Sea vortices observed by satellite altimeters over a 7-yr period. A vortex has been defined as the simply connected region with values of the Okubo–Weiss parameter W < −0.2σW, where σW is the spatial standard deviation of W, and the same sign of vorticity. This definition is shown to be appropriate to detect and characterize, statistically, properties such as size, mean kinetic energy, and amplitude of vortices in the Mediterranean basin from sea level anomaly maps corresponding to the period from October 1992 to October 1999. The distribution of such properties for the Mediterranean vortices suggests a heuristic criterion to extract and select very coherent and long-lived vortices from the whole set of structures identified in altimetric maps. Such coherent vortices appear to be selected for amplitudes greater than 2σW, where the amplitude has been defined in terms of the Okubo–Weiss parameter rather than vorticity, and strongly correspond to those reported from observations with independent data. Systematic locating and tracking of such vortices provide, for the first time, a general picture of their preferential paths in the Mediterranean basin, which are characterized by complex but rather well defined patterns.</description><identifier>ISSN: 0022-3670</identifier><identifier>EISSN: 1520-0485</identifier><identifier>DOI: 10.1175/jpo2826.1</identifier><identifier>CODEN: JPYOBT</identifier><language>eng</language><publisher>Boston, MA: American Meteorological Society</publisher><subject>Altimeters ; Amplitude ; Amplitudes ; Cyclones ; Earth, ocean, space ; Exact sciences and technology ; External geophysics ; General circulation models ; Kinetic energy ; Locating ; Mesoscale vortexes ; Ocean currents ; Oceanic turbulence ; Oceanography ; Parameters ; Physics of the oceans ; Salinity ; Satellite altimetry ; Satellite observation ; Satellites ; Sea level ; Sea level anomalies ; Thermohaline structure and circulation. Turbulence and diffusion ; Topography ; Tracking ; Turbulence ; Vortices ; Vorticity</subject><ispartof>Journal of physical oceanography, 2006, Vol.36 (1), p.87-103</ispartof><rights>2006 INIST-CNRS</rights><rights>Copyright American Meteorological Society Jan 2006</rights><rights>Copyright American Meteorological Society 2006</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c446t-a74a55435d13d3c1832fd5ddca8d2d3020fd74e83c9dc5b2d7bfb70e4cab05a23</citedby><cites>FETCH-LOGICAL-c446t-a74a55435d13d3c1832fd5ddca8d2d3020fd74e83c9dc5b2d7bfb70e4cab05a23</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,3679,4022,27922,27923,27924</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=17535745$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>ISERN-FONTANET, Jordi</creatorcontrib><creatorcontrib>GARCIA-LADONA, Emilio</creatorcontrib><creatorcontrib>FONT, Jordi</creatorcontrib><title>Vortices of the Mediterranean Sea : An altimetric perspective</title><title>Journal of physical oceanography</title><description>The presence of coherent vortices makes observed mesoscale fields of the ocean resemble two-dimensional turbulence. Using this analogy, a common definition of a coherent structure has been used to study the statistical properties of Mediterranean Sea vortices observed by satellite altimeters over a 7-yr period. A vortex has been defined as the simply connected region with values of the Okubo–Weiss parameter W < −0.2σW, where σW is the spatial standard deviation of W, and the same sign of vorticity. This definition is shown to be appropriate to detect and characterize, statistically, properties such as size, mean kinetic energy, and amplitude of vortices in the Mediterranean basin from sea level anomaly maps corresponding to the period from October 1992 to October 1999. The distribution of such properties for the Mediterranean vortices suggests a heuristic criterion to extract and select very coherent and long-lived vortices from the whole set of structures identified in altimetric maps. Such coherent vortices appear to be selected for amplitudes greater than 2σW, where the amplitude has been defined in terms of the Okubo–Weiss parameter rather than vorticity, and strongly correspond to those reported from observations with independent data. Systematic locating and tracking of such vortices provide, for the first time, a general picture of their preferential paths in the Mediterranean basin, which are characterized by complex but rather well defined patterns.</description><subject>Altimeters</subject><subject>Amplitude</subject><subject>Amplitudes</subject><subject>Cyclones</subject><subject>Earth, ocean, space</subject><subject>Exact sciences and technology</subject><subject>External geophysics</subject><subject>General circulation models</subject><subject>Kinetic energy</subject><subject>Locating</subject><subject>Mesoscale vortexes</subject><subject>Ocean currents</subject><subject>Oceanic turbulence</subject><subject>Oceanography</subject><subject>Parameters</subject><subject>Physics of the oceans</subject><subject>Salinity</subject><subject>Satellite altimetry</subject><subject>Satellite observation</subject><subject>Satellites</subject><subject>Sea level</subject><subject>Sea level anomalies</subject><subject>Thermohaline structure and circulation. Turbulence and diffusion</subject><subject>Topography</subject><subject>Tracking</subject><subject>Turbulence</subject><subject>Vortices</subject><subject>Vorticity</subject><issn>0022-3670</issn><issn>1520-0485</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2006</creationdate><recordtype>article</recordtype><sourceid>8G5</sourceid><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GNUQQ</sourceid><sourceid>GUQSH</sourceid><sourceid>M2O</sourceid><recordid>eNp10EtLAzEUBeAgCtbqwn8QFAUXU29ezYzgohSfVCr42IZMksGU6cyYpIL_3iktCIKru_nu4XAQOiYwIkSKy0XX0pyOR2QHDYigkAHPxS4aAFCasbGEfXQQ4wIAxoQWA3T93obkjYu4rXD6cPjJWZ9cCLpxusEvTuMrPGmwrpNfuhS8wZ0LsXMm-S93iPYqXUd3tL1D9HZ78zq9z2bzu4fpZJYZzscp05JrITgTljDLDMkZrayw1ujcUsuAQmUldzkzhTWipFaWVSnBcaNLEJqyITrf5Hah_Vy5mNTSR-Pqum_ZrqIiEiRhLO_h6R-4aFeh6bspmgMICYzKXp38qygrWCEL0qOLDTKhjTG4SnXBL3X4VgTUemv1-Dxfb63W9mwbqKPRddWvZ3z8fZCCCckF-wGckXxZ</recordid><startdate>2006</startdate><enddate>2006</enddate><creator>ISERN-FONTANET, Jordi</creator><creator>GARCIA-LADONA, Emilio</creator><creator>FONT, Jordi</creator><general>American Meteorological Society</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>7TG</scope><scope>7TN</scope><scope>7XB</scope><scope>88F</scope><scope>88I</scope><scope>8AF</scope><scope>8FE</scope><scope>8FG</scope><scope>8FK</scope><scope>8G5</scope><scope>ABUWG</scope><scope>AEUYN</scope><scope>AFKRA</scope><scope>ARAPS</scope><scope>ATCPS</scope><scope>AZQEC</scope><scope>BEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>BHPHI</scope><scope>BKSAR</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>F1W</scope><scope>GNUQQ</scope><scope>GUQSH</scope><scope>H96</scope><scope>HCIFZ</scope><scope>KL.</scope><scope>L.G</scope><scope>M1Q</scope><scope>M2O</scope><scope>M2P</scope><scope>MBDVC</scope><scope>P5Z</scope><scope>P62</scope><scope>PATMY</scope><scope>PCBAR</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PYCSY</scope><scope>Q9U</scope><scope>S0X</scope></search><sort><creationdate>2006</creationdate><title>Vortices of the Mediterranean Sea : An altimetric perspective</title><author>ISERN-FONTANET, Jordi ; GARCIA-LADONA, Emilio ; FONT, Jordi</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c446t-a74a55435d13d3c1832fd5ddca8d2d3020fd74e83c9dc5b2d7bfb70e4cab05a23</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2006</creationdate><topic>Altimeters</topic><topic>Amplitude</topic><topic>Amplitudes</topic><topic>Cyclones</topic><topic>Earth, ocean, space</topic><topic>Exact sciences and technology</topic><topic>External geophysics</topic><topic>General circulation models</topic><topic>Kinetic energy</topic><topic>Locating</topic><topic>Mesoscale vortexes</topic><topic>Ocean currents</topic><topic>Oceanic turbulence</topic><topic>Oceanography</topic><topic>Parameters</topic><topic>Physics of the oceans</topic><topic>Salinity</topic><topic>Satellite altimetry</topic><topic>Satellite observation</topic><topic>Satellites</topic><topic>Sea level</topic><topic>Sea level anomalies</topic><topic>Thermohaline structure and circulation. Turbulence and diffusion</topic><topic>Topography</topic><topic>Tracking</topic><topic>Turbulence</topic><topic>Vortices</topic><topic>Vorticity</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>ISERN-FONTANET, Jordi</creatorcontrib><creatorcontrib>GARCIA-LADONA, Emilio</creatorcontrib><creatorcontrib>FONT, Jordi</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>ProQuest Central (Corporate)</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Oceanic Abstracts</collection><collection>ProQuest Central (purchase pre-March 2016)</collection><collection>Military Database (Alumni Edition)</collection><collection>Science Database (Alumni Edition)</collection><collection>STEM Database</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>ProQuest Central (Alumni) (purchase pre-March 2016)</collection><collection>Research Library (Alumni Edition)</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest One Sustainability</collection><collection>ProQuest Central UK/Ireland</collection><collection>Advanced Technologies & Aerospace Collection</collection><collection>Agricultural & Environmental Science Collection</collection><collection>ProQuest Central Essentials</collection><collection>eLibrary</collection><collection>ProQuest Central</collection><collection>Technology Collection</collection><collection>Natural Science Collection</collection><collection>Earth, Atmospheric & Aquatic Science Collection</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central Korea</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>ProQuest Central Student</collection><collection>Research Library Prep</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>SciTech Premium Collection</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><collection>Military Database</collection><collection>Research Library</collection><collection>Science Database</collection><collection>Research Library (Corporate)</collection><collection>Advanced Technologies & Aerospace Database</collection><collection>ProQuest Advanced Technologies & Aerospace Collection</collection><collection>Environmental Science Database</collection><collection>Earth, Atmospheric & Aquatic Science Database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>Environmental Science Collection</collection><collection>ProQuest Central Basic</collection><collection>SIRS Editorial</collection><jtitle>Journal of physical oceanography</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>ISERN-FONTANET, Jordi</au><au>GARCIA-LADONA, Emilio</au><au>FONT, Jordi</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Vortices of the Mediterranean Sea : An altimetric perspective</atitle><jtitle>Journal of physical oceanography</jtitle><date>2006</date><risdate>2006</risdate><volume>36</volume><issue>1</issue><spage>87</spage><epage>103</epage><pages>87-103</pages><issn>0022-3670</issn><eissn>1520-0485</eissn><coden>JPYOBT</coden><abstract>The presence of coherent vortices makes observed mesoscale fields of the ocean resemble two-dimensional turbulence. Using this analogy, a common definition of a coherent structure has been used to study the statistical properties of Mediterranean Sea vortices observed by satellite altimeters over a 7-yr period. A vortex has been defined as the simply connected region with values of the Okubo–Weiss parameter W < −0.2σW, where σW is the spatial standard deviation of W, and the same sign of vorticity. This definition is shown to be appropriate to detect and characterize, statistically, properties such as size, mean kinetic energy, and amplitude of vortices in the Mediterranean basin from sea level anomaly maps corresponding to the period from October 1992 to October 1999. The distribution of such properties for the Mediterranean vortices suggests a heuristic criterion to extract and select very coherent and long-lived vortices from the whole set of structures identified in altimetric maps. Such coherent vortices appear to be selected for amplitudes greater than 2σW, where the amplitude has been defined in terms of the Okubo–Weiss parameter rather than vorticity, and strongly correspond to those reported from observations with independent data. Systematic locating and tracking of such vortices provide, for the first time, a general picture of their preferential paths in the Mediterranean basin, which are characterized by complex but rather well defined patterns.</abstract><cop>Boston, MA</cop><pub>American Meteorological Society</pub><doi>10.1175/jpo2826.1</doi><tpages>17</tpages><oa>free_for_read</oa></addata></record> |
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| ispartof | Journal of physical oceanography, 2006, Vol.36 (1), p.87-103 |
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| subjects | Altimeters Amplitude Amplitudes Cyclones Earth, ocean, space Exact sciences and technology External geophysics General circulation models Kinetic energy Locating Mesoscale vortexes Ocean currents Oceanic turbulence Oceanography Parameters Physics of the oceans Salinity Satellite altimetry Satellite observation Satellites Sea level Sea level anomalies Thermohaline structure and circulation. Turbulence and diffusion Topography Tracking Turbulence Vortices Vorticity |
| title | Vortices of the Mediterranean Sea : An altimetric perspective |
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