Sea ice motion and open water area at the Ronne Polynia, Antarctica: Synthetic aperture radar observations versus model results
Identifieur interne : 001B66 ( Istex/Corpus ); précédent : 001B65; suivant : 001B67Sea ice motion and open water area at the Ronne Polynia, Antarctica: Synthetic aperture radar observations versus model results
Auteurs : T. Hollands ; V. Haid ; W. Dierking ; R. Timmermann ; L. EbnerSource :
- Journal of Geophysical Research: Oceans [ 2169-9275 ] ; 2013-04.
Abstract
This study deals with observations and simulations of the evolution of coastal polynias focusing on the Ronne Polynia. We compare differences in polynia extent and ice drift patterns derived from satellite radar images and from simulations with the Finite Element Sea Ice Ocean Model, employing three atmospheric forcing data sets that differ in spatial and temporal resolution. Two polynia events are analyzed, one from austral summer and one from late fall 2008. The open water area in the polynia is of similar size in the satellite images and in the model simulations, but its temporal evolution differs depending on katabatic winds being resolved in the atmospheric forcing data sets. Modeled ice drift is slower than the observed and reveals greater turning angles relative to the wind direction in many cases. For the summer event, model results obtained with high‐resolution forcing are closer to the drift field derived from radar imagery than those from coarse resolution forcing. For the late fall event, none of the forcing data yields outstanding results. Our study demonstrates that a dense (1–3 km) model grid and atmospheric forcing provided at high spatial resolution ( < 50 km) are critical to correctly simulate coastal polynias with a coupled sea‐ice ocean model.
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DOI: 10.1002/jgrc.20158
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Dierking</name><affiliation><mods:affiliation>Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, Germany</mods:affiliation></affiliation></author><author><name sortKey="Timmermann, R" sort="Timmermann, R" uniqKey="Timmermann R" first="R." last="Timmermann">R. Timmermann</name><affiliation><mods:affiliation>Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, Germany</mods:affiliation></affiliation></author><author><name sortKey="Ebner, L" sort="Ebner, L" uniqKey="Ebner L" first="L." last="Ebner">L. 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Hollands</name><affiliation><mods:affiliation>Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, Germany</mods:affiliation></affiliation><affiliation><mods:affiliation>E-mail: thomas.hollands@awi.de</mods:affiliation></affiliation></author><author><name sortKey="Haid, V" sort="Haid, V" uniqKey="Haid V" first="V." last="Haid">V. Haid</name><affiliation><mods:affiliation>Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, Germany</mods:affiliation></affiliation></author><author><name sortKey="Dierking, W" sort="Dierking, W" uniqKey="Dierking W" first="W." last="Dierking">W. Dierking</name><affiliation><mods:affiliation>Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, Germany</mods:affiliation></affiliation></author><author><name sortKey="Timmermann, R" sort="Timmermann, R" uniqKey="Timmermann R" first="R." last="Timmermann">R. Timmermann</name><affiliation><mods:affiliation>Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, Germany</mods:affiliation></affiliation></author><author><name sortKey="Ebner, L" sort="Ebner, L" uniqKey="Ebner L" first="L." last="Ebner">L. Ebner</name><affiliation><mods:affiliation>Department of Environmental Meteorology, Faculty of Geosciences, University of Trier, Trier, Germany</mods:affiliation></affiliation></author></analytic><monogr></monogr><series><title level="j">Journal of Geophysical Research: Oceans</title><title level="j" type="abbrev">J. Geophys. Res. Oceans</title><idno type="ISSN">2169-9275</idno><idno type="eISSN">2169-9291</idno><imprint><publisher>Blackwell Publishing Ltd</publisher><date type="published" when="2013-04">2013-04</date><biblScope unit="volume">118</biblScope><biblScope unit="issue">4</biblScope><biblScope unit="page" from="1940">1940</biblScope><biblScope unit="page" to="1954">1954</biblScope></imprint><idno type="ISSN">2169-9275</idno></series><idno type="istex">6913325E4B5F23EF7C003E9D0DC67CF8612F7649</idno><idno type="DOI">10.1002/jgrc.20158</idno><idno type="ArticleID">JGRC20158</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">2169-9275</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract">This study deals with observations and simulations of the evolution of coastal polynias focusing on the Ronne Polynia. We compare differences in polynia extent and ice drift patterns derived from satellite radar images and from simulations with the Finite Element Sea Ice Ocean Model, employing three atmospheric forcing data sets that differ in spatial and temporal resolution. Two polynia events are analyzed, one from austral summer and one from late fall 2008. The open water area in the polynia is of similar size in the satellite images and in the model simulations, but its temporal evolution differs depending on katabatic winds being resolved in the atmospheric forcing data sets. Modeled ice drift is slower than the observed and reveals greater turning angles relative to the wind direction in many cases. For the summer event, model results obtained with high‐resolution forcing are closer to the drift field derived from radar imagery than those from coarse resolution forcing. For the late fall event, none of the forcing data yields outstanding results. Our study demonstrates that a dense (1–3 km) model grid and atmospheric forcing provided at high spatial resolution ( < 50 km) are critical to correctly simulate coastal polynias with a coupled sea‐ice ocean model.</div></front></TEI><istex><corpusName>wiley</corpusName><author><json:item><name>T. Hollands</name><affiliations><json:string>Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, Germany</json:string><json:string>E-mail: thomas.hollands@awi.de</json:string></affiliations></json:item><json:item><name>V. Haid</name><affiliations><json:string>Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, Germany</json:string></affiliations></json:item><json:item><name>W. Dierking</name><affiliations><json:string>Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, Germany</json:string></affiliations></json:item><json:item><name>R. Timmermann</name><affiliations><json:string>Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, Germany</json:string></affiliations></json:item><json:item><name>L. Ebner</name><affiliations><json:string>Department of Environmental Meteorology, Faculty of Geosciences, University of Trier, Trier, Germany</json:string></affiliations></json:item></author><subject><json:item><lang><json:string>eng</json:string></lang><value>sea ice kinematics</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>satellite observation</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>model simulation</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>polynia</value></json:item></subject><articleId><json:string>JGRC20158</json:string></articleId><language><json:string>eng</json:string></language><originalGenre><json:string>article</json:string></originalGenre><qualityIndicators><score>8.9</score><pdfVersion>1.6</pdfVersion><pdfPageSize>612.127 x 792.08 pts</pdfPageSize><refBibsNative>true</refBibsNative><abstractCharCount>1283</abstractCharCount><pdfWordCount>9637</pdfWordCount><pdfCharCount>58426</pdfCharCount><pdfPageCount>15</pdfPageCount><abstractWordCount>200</abstractWordCount></qualityIndicators><title>Sea ice motion and open water area at the Ronne Polynia, Antarctica: Synthetic aperture radar observations versus model results</title><refBibs><json:item><author><json:item><name>K. 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American Geophysical Union. All Rights Reserved.©2013. American Geophysical Union. All Rights Reserved.</p></availability><date>2013-04</date></publicationStmt><notesStmt><note>Deutsche Forschungsgemeinschaft SPP Antarktisforschung - No. TI 296/5; No. HE 2740/10;</note><note>EU 7th Framework project SIDARUS - No. 262922;</note></notesStmt><sourceDesc><biblStruct type="inbook"><analytic><title level="a" type="main" xml:lang="en">Sea ice motion and open water area at the Ronne Polynia, Antarctica: Synthetic aperture radar observations versus model results</title><author xml:id="author-1"><persName><forename type="first">T.</forename><surname>Hollands</surname></persName><email>thomas.hollands@awi.de</email><affiliation>Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, Germany</affiliation></author><author xml:id="author-2"><persName><forename type="first">V.</forename><surname>Haid</surname></persName><affiliation>Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, Germany</affiliation></author><author xml:id="author-3"><persName><forename type="first">W.</forename><surname>Dierking</surname></persName><affiliation>Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, Germany</affiliation></author><author xml:id="author-4"><persName><forename type="first">R.</forename><surname>Timmermann</surname></persName><affiliation>Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, Germany</affiliation></author><author xml:id="author-5"><persName><forename type="first">L.</forename><surname>Ebner</surname></persName><affiliation>Department of Environmental Meteorology, Faculty of Geosciences, University of Trier, Trier, Germany</affiliation></author></analytic><monogr><title level="j">Journal of Geophysical Research: Oceans</title><title level="j" type="abbrev">J. Geophys. Res. Oceans</title><idno type="pISSN">2169-9275</idno><idno type="eISSN">2169-9291</idno><idno type="DOI">10.1002/(ISSN)2169-9291</idno><imprint><publisher>Blackwell Publishing Ltd</publisher><date type="published" when="2013-04"></date><biblScope unit="volume">118</biblScope><biblScope unit="issue">4</biblScope><biblScope unit="page" from="1940">1940</biblScope><biblScope unit="page" to="1954">1954</biblScope></imprint></monogr><idno type="istex">6913325E4B5F23EF7C003E9D0DC67CF8612F7649</idno><idno type="DOI">10.1002/jgrc.20158</idno><idno type="ArticleID">JGRC20158</idno></biblStruct></sourceDesc></fileDesc><profileDesc><creation><date>2013-04</date></creation><langUsage><language ident="en">en</language></langUsage><abstract><p>This study deals with observations and simulations of the evolution of coastal polynias focusing on the Ronne Polynia. We compare differences in polynia extent and ice drift patterns derived from satellite radar images and from simulations with the Finite Element Sea Ice Ocean Model, employing three atmospheric forcing data sets that differ in spatial and temporal resolution. Two polynia events are analyzed, one from austral summer and one from late fall 2008. The open water area in the polynia is of similar size in the satellite images and in the model simulations, but its temporal evolution differs depending on katabatic winds being resolved in the atmospheric forcing data sets. Modeled ice drift is slower than the observed and reveals greater turning angles relative to the wind direction in many cases. For the summer event, model results obtained with high‐resolution forcing are closer to the drift field derived from radar imagery than those from coarse resolution forcing. For the late fall event, none of the forcing data yields outstanding results. Our study demonstrates that a dense (1–3 km) model grid and atmospheric forcing provided at high spatial resolution ( < 50 km) are critical to correctly simulate coastal polynias with a coupled sea‐ice ocean model.</p></abstract><abstract style="short"><p>Observations on polynia extent and ice motion based on SAR imagesInfluence of wind forcing on sea ice motion in a coupled sea ice ocean modelHigh resolution sea ice motion data from SAR observations for model validation</p></abstract><textClass><keywords scheme="keyword"><list><head>keywords</head><item><term>sea ice kinematics</term></item><item><term>satellite observation</term></item><item><term>model simulation</term></item><item><term>polynia</term></item></list></keywords></textClass><textClass><keywords scheme="Journal Subject"><list><head>index-terms</head><item><term>CRYOSPHERE</term></item><item><term>Sea ice</term></item><item><term>Polynas</term></item><item><term>Remote sensing</term></item><item><term>Modeling</term></item><item><term>INFORMATICS</term></item><item><term>Modeling</term></item><item><term>OCEANOGRAPHY: GENERAL</term></item><item><term>Arctic and Antarctic oceanography</term></item><item><term>NATURAL HAZARDS</term></item><item><term>Physical modeling</term></item><item><term>OCEANOGRAPHY: PHYSICAL</term></item><item><term>Ice mechanics and air/sea/ice exchange processes</term></item><item><term>GEOGRAPHIC LOCATION</term></item><item><term>Antarctica</term></item></list></keywords></textClass><textClass><keywords scheme="Journal Subject"><list><head>article-category</head><item><term>Regular Article</term></item></list></keywords></textClass></profileDesc><revisionDesc><change when="2012-06-28">Received</change><change when="2013-03-08">Registration</change><change when="2013-04">Created</change><change when="2013-04">Published</change></revisionDesc></teiHeader></istex:fulltextTEI><json:item><extension>txt</extension><original>false</original><mimetype>text/plain</mimetype><uri>https://api.istex.fr/document/6913325E4B5F23EF7C003E9D0DC67CF8612F7649/fulltext/txt</uri></json:item></fulltext><metadata><istex:metadataXml wicri:clean="Wiley, elements deleted: body"><istex:xmlDeclaration>version="1.0" encoding="UTF-8" standalone="yes"</istex:xmlDeclaration><istex:document><component type="serialArticle" version="2.0" xml:lang="en" xml:id="jgrc20158"><header xml:id="jgrc20158-hdr-0001"><publicationMeta level="product"><doi>10.1002/(ISSN)2169-9291</doi><issn type="print">2169-9275</issn><issn type="electronic">2169-9291</issn><idGroup><id type="product" value="JGRC"></id></idGroup><titleGroup><title type="main" sort="JOURNAL OF GEOPHYSICAL RESEARCH: OCEANS">Journal of Geophysical Research: Oceans</title><title type="short">J. Geophys. Res. Oceans</title></titleGroup></publicationMeta><publicationMeta level="part" position="40"><doi>10.1002/jgrc.v118.4</doi><copyright ownership="publisher">©2013. American Geophysical Union. All Rights Reserved.</copyright><numberingGroup><numbering type="journalVolume" number="118">118</numbering><numbering type="journalIssue">4</numbering></numberingGroup><coverDate startDate="2013-04">April 2013</coverDate></publicationMeta><publicationMeta level="unit" position="210" type="article" status="forIssue"><doi>10.1002/jgrc.20158</doi><idGroup><id type="unit" value="JGRC20158"></id></idGroup><countGroup><count type="pageTotal" number="15"></count></countGroup><titleGroup><title type="articleCategory">Regular Article</title><title type="tocHeading1">Regular Articles</title></titleGroup><copyright ownership="publisher">©2013. American Geophysical Union. All Rights Reserved.</copyright><eventGroup><event type="manuscriptReceived" date="2012-06-28"></event><event type="manuscriptRevised" date="2013-02-28"></event><event type="manuscriptAccepted" date="2013-03-08"></event><event type="xmlCreated" agent="SPi Global" date="2013-04"></event><event type="publishedOnlineAccepted" date="2013-03-13"></event><event type="publishedOnlineEarlyUnpaginated" date="2013-04-11"></event><event type="publishedOnlineFinalForm" date="2013-05-17"></event><event type="firstOnline" date="2013-04-11"></event><event type="xmlConverted" agent="Converter:WILEY_ML3G_TO_WILEY_ML3GV2 version:4.0.1" date="2014-03-20"></event><event type="xmlConverted" agent="Converter:WML3G_To_WML3G version:4.7.5 mode:FullText" date="2016-01-21"></event></eventGroup><numberingGroup><numbering type="pageFirst">1940</numbering><numbering type="pageLast">1954</numbering></numberingGroup><correspondenceTo>Corresponding author: T. Hollands, EOS / Polar Meteorology, Climate Science Division, Alfred Wegener Institute for Polar and Marine Research, Bussestraße 24, 27570 Bremerhaven, Germany. (<email>thomas.hollands@awi.de</email>)</correspondenceTo><subjectInfo><subject href="http://psi.agu.org/taxonomy5/0700">CRYOSPHERE</subject><subjectInfo><subject href="http://psi.agu.org/taxonomy5/0750">Sea ice</subject><subject href="http://psi.agu.org/taxonomy5/0752">Polynas</subject><subject href="http://psi.agu.org/taxonomy5/0758">Remote sensing</subject><subject href="http://psi.agu.org/taxonomy5/0798">Modeling</subject></subjectInfo><subject role="crossTerm" href="http://psi.agu.org/taxonomy5/1900">INFORMATICS</subject><subjectInfo><subject role="crossTerm" href="http://psi.agu.org/taxonomy5/1952">Modeling</subject></subjectInfo><subject role="crossTerm" href="http://psi.agu.org/taxonomy5/4200">OCEANOGRAPHY: GENERAL</subject><subjectInfo><subject role="crossTerm" href="http://psi.agu.org/taxonomy5/4207">Arctic and Antarctic oceanography</subject></subjectInfo><subject role="crossTerm" href="http://psi.agu.org/taxonomy5/4300">NATURAL HAZARDS</subject><subjectInfo><subject role="crossTerm" href="http://psi.agu.org/taxonomy5/4316">Physical modeling</subject></subjectInfo><subject role="crossTerm" href="http://psi.agu.org/taxonomy5/4500">OCEANOGRAPHY: PHYSICAL</subject><subjectInfo><subject role="crossTerm" href="http://psi.agu.org/taxonomy5/4540">Ice mechanics and air/sea/ice exchange processes</subject></subjectInfo><subject href="http://psi.agu.org/taxonomy5/9300">GEOGRAPHIC LOCATION</subject><subjectInfo><subject href="http://psi.agu.org/taxonomy5/9310">Antarctica</subject></subjectInfo></subjectInfo><selfCitationGroup><citation type="self" xml:id="jgrc20158-cit-0045"><author><familyName>Hollands</familyName>, <givenNames>T.</givenNames></author>, <author><givenNames>V.</givenNames><familyName>Haid</familyName></author>, <author><givenNames>W.</givenNames><familyName>Dierking</familyName></author>, <author><givenNames>R.</givenNames><familyName>Timmermann</familyName></author>, and <author><givenNames>L.</givenNames><familyName>Ebner</familyName></author> (<pubYear year="2013">2013</pubYear>), <articleTitle>Sea ice motion and open water area at the Ronne Polynia, Antarctica: Synthetic aperture radar observations versus model results</articleTitle>, <journalTitle>J. Geophys. Res. Oceans</journalTitle>, <vol>118</vol>, <pageFirst>1940</pageFirst>–<pageLast>1954</pageLast>, doi:<accessionId ref="info:doi/10.1002/jgrc.20158">10.1002/jgrc.20158</accessionId>.</citation></selfCitationGroup><linkGroup><link type="toTypesetVersion" href="file:JGRC.JGRC20158.pdf"></link></linkGroup></publicationMeta><contentMeta><titleGroup><title type="main">Sea ice motion and open water area at the Ronne Polynia, Antarctica: Synthetic aperture radar observations versus model results</title><title type="shortAuthors">HOLLANDS ET AL.</title><title type="short">SEA ICE MOTION AND OPEN WATER AREA AT THE RONNE POLYNIA</title></titleGroup><creators><creator xml:id="jgrc20158-cr-0001" creatorRole="author" affiliationRef="#jgrc20158-aff-0001" corresponding="yes"><personName><givenNames>T.</givenNames><familyName>Hollands</familyName></personName></creator><creator xml:id="jgrc20158-cr-0002" creatorRole="author" affiliationRef="#jgrc20158-aff-0001"><personName><givenNames>V.</givenNames><familyName>Haid</familyName></personName></creator><creator xml:id="jgrc20158-cr-0003" creatorRole="author" affiliationRef="#jgrc20158-aff-0001"><personName><givenNames>W.</givenNames><familyName>Dierking</familyName></personName></creator><creator xml:id="jgrc20158-cr-0004" creatorRole="author" affiliationRef="#jgrc20158-aff-0001"><personName><givenNames>R.</givenNames><familyName>Timmermann</familyName></personName></creator><creator xml:id="jgrc20158-cr-0005" creatorRole="author" affiliationRef="#jgrc20158-aff-0002"><personName><givenNames>L.</givenNames><familyName>Ebner</familyName></personName></creator></creators><affiliationGroup><affiliation xml:id="jgrc20158-aff-0001" countryCode="DE" type="organization"><orgName>Alfred Wegener Institute for Polar and Marine Research</orgName><address><city>Bremerhaven</city><country>Germany</country></address></affiliation><affiliation xml:id="jgrc20158-aff-0002" countryCode="DE" type="organization"><orgDiv>Department of Environmental Meteorology, Faculty of Geosciences</orgDiv><orgName>University of Trier</orgName><address><city>Trier</city><country>Germany</country></address></affiliation></affiliationGroup><keywordGroup type="author"><keyword xml:id="jgrc20158-kwd-0001">sea ice kinematics</keyword><keyword xml:id="jgrc20158-kwd-0002">satellite observation</keyword><keyword xml:id="jgrc20158-kwd-0003">model simulation</keyword><keyword xml:id="jgrc20158-kwd-0004">polynia</keyword></keywordGroup><fundingInfo><fundingAgency>Deutsche Forschungsgemeinschaft SPP Antarktisforschung</fundingAgency><fundingNumber>TI 296/5</fundingNumber><fundingNumber>HE 2740/10</fundingNumber></fundingInfo><fundingInfo><fundingAgency>EU 7th Framework project SIDARUS</fundingAgency><fundingNumber>262922</fundingNumber></fundingInfo><abstractGroup><abstract type="main" xml:id="jgrc20158-abs-0001"><p xml:id="jgrc20158-para-0001" label="1">This study deals with observations and simulations of the evolution of coastal polynias focusing on the Ronne Polynia. We compare differences in polynia extent and ice drift patterns derived from satellite radar images and from simulations with the Finite Element Sea Ice Ocean Model, employing three atmospheric forcing data sets that differ in spatial and temporal resolution. Two polynia events are analyzed, one from austral summer and one from late fall 2008. The open water area in the polynia is of similar size in the satellite images and in the model simulations, but its temporal evolution differs depending on katabatic winds being resolved in the atmospheric forcing data sets. Modeled ice drift is slower than the observed and reveals greater turning angles relative to the wind direction in many cases. For the summer event, model results obtained with high‐resolution forcing are closer to the drift field derived from radar imagery than those from coarse resolution forcing. For the late fall event, none of the forcing data yields outstanding results. Our study demonstrates that a dense (1–3 km) model grid and atmospheric forcing provided at high spatial resolution ( < 50 km) are critical to correctly simulate coastal polynias with a coupled sea‐ice ocean model.</p></abstract><abstract type="short"><title type="main">Key Points</title><p xml:id="jgrc20158-para-0002"><list style="bulleted"><listItem xml:id="jgrc20158-li-0001">Observations on polynia extent and ice motion based on SAR images</listItem><listItem xml:id="jgrc20158-li-0002">Influence of wind forcing on sea ice motion in a coupled sea ice ocean model</listItem><listItem xml:id="jgrc20158-li-0003">High resolution sea ice motion data from SAR observations for model validation</listItem></list></p></abstract></abstractGroup> </contentMeta> </header></component></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Sea ice motion and open water area at the Ronne Polynia, Antarctica: Synthetic aperture radar observations versus model results</title></titleInfo><titleInfo type="abbreviated" lang="en"><title>SEA ICE MOTION AND OPEN WATER AREA AT THE RONNE POLYNIA</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>Sea ice motion and open water area at the Ronne Polynia, Antarctica: Synthetic aperture radar observations versus model results</title></titleInfo><name type="personal"><namePart type="given">T.</namePart><namePart type="family">Hollands</namePart><affiliation>Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, Germany</affiliation><affiliation>E-mail: thomas.hollands@awi.de</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">V.</namePart><namePart type="family">Haid</namePart><affiliation>Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, Germany</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">W.</namePart><namePart type="family">Dierking</namePart><affiliation>Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, Germany</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">R.</namePart><namePart type="family">Timmermann</namePart><affiliation>Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, Germany</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">L.</namePart><namePart type="family">Ebner</namePart><affiliation>Department of Environmental Meteorology, Faculty of Geosciences, University of Trier, Trier, Germany</affiliation><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="article" displayLabel="article"></genre><originInfo><publisher>Blackwell Publishing Ltd</publisher><dateIssued encoding="w3cdtf">2013-04</dateIssued><dateCreated encoding="w3cdtf">2013-04</dateCreated><dateCaptured encoding="w3cdtf">2012-06-28</dateCaptured><dateValid encoding="w3cdtf">2013-03-08</dateValid><edition>Hollands, T., V. Haid, W. Dierking, R. Timmermann, and L. Ebner (2013), Sea ice motion and open water area at the Ronne Polynia, Antarctica: Synthetic aperture radar observations versus model results, J. Geophys. Res. Oceans, 118, 1940–1954, doi:10.1002/jgrc.20158.</edition><copyrightDate encoding="w3cdtf">2013</copyrightDate></originInfo><language><languageTerm type="code" authority="rfc3066">en</languageTerm><languageTerm type="code" authority="iso639-2b">eng</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType></physicalDescription><abstract>This study deals with observations and simulations of the evolution of coastal polynias focusing on the Ronne Polynia. We compare differences in polynia extent and ice drift patterns derived from satellite radar images and from simulations with the Finite Element Sea Ice Ocean Model, employing three atmospheric forcing data sets that differ in spatial and temporal resolution. Two polynia events are analyzed, one from austral summer and one from late fall 2008. The open water area in the polynia is of similar size in the satellite images and in the model simulations, but its temporal evolution differs depending on katabatic winds being resolved in the atmospheric forcing data sets. Modeled ice drift is slower than the observed and reveals greater turning angles relative to the wind direction in many cases. For the summer event, model results obtained with high‐resolution forcing are closer to the drift field derived from radar imagery than those from coarse resolution forcing. For the late fall event, none of the forcing data yields outstanding results. Our study demonstrates that a dense (1–3 km) model grid and atmospheric forcing provided at high spatial resolution ( < 50 km) are critical to correctly simulate coastal polynias with a coupled sea‐ice ocean model.</abstract><abstract type="short">Observations on polynia extent and ice motion based on SAR imagesInfluence of wind forcing on sea ice motion in a coupled sea ice ocean modelHigh resolution sea ice motion data from SAR observations for model validation</abstract><note type="funding">Deutsche Forschungsgemeinschaft SPP Antarktisforschung - No. TI 296/5; No. HE 2740/10; </note><note type="funding">EU 7th Framework project SIDARUS - No. 262922; </note><subject><genre>keywords</genre><topic>sea ice kinematics</topic><topic>satellite observation</topic><topic>model simulation</topic><topic>polynia</topic></subject><relatedItem type="host"><titleInfo><title>Journal of Geophysical Research: Oceans</title></titleInfo><titleInfo type="abbreviated"><title>J. Geophys. Res. Oceans</title></titleInfo><genre type="journal">journal</genre><subject><genre>index-terms</genre><topic authorityURI="http://psi.agu.org/taxonomy5/0700">CRYOSPHERE</topic><topic authorityURI="http://psi.agu.org/taxonomy5/0750">Sea ice</topic><topic authorityURI="http://psi.agu.org/taxonomy5/0752">Polynas</topic><topic authorityURI="http://psi.agu.org/taxonomy5/0758">Remote sensing</topic><topic authorityURI="http://psi.agu.org/taxonomy5/0798">Modeling</topic><topic authorityURI="http://psi.agu.org/taxonomy5/1900">INFORMATICS</topic><topic authorityURI="http://psi.agu.org/taxonomy5/1952">Modeling</topic><topic authorityURI="http://psi.agu.org/taxonomy5/4200">OCEANOGRAPHY: GENERAL</topic><topic authorityURI="http://psi.agu.org/taxonomy5/4207">Arctic and Antarctic oceanography</topic><topic authorityURI="http://psi.agu.org/taxonomy5/4300">NATURAL HAZARDS</topic><topic authorityURI="http://psi.agu.org/taxonomy5/4316">Physical modeling</topic><topic authorityURI="http://psi.agu.org/taxonomy5/4500">OCEANOGRAPHY: PHYSICAL</topic><topic authorityURI="http://psi.agu.org/taxonomy5/4540">Ice mechanics and air/sea/ice exchange processes</topic><topic authorityURI="http://psi.agu.org/taxonomy5/9300">GEOGRAPHIC LOCATION</topic><topic authorityURI="http://psi.agu.org/taxonomy5/9310">Antarctica</topic></subject><subject><genre>article-category</genre><topic>Regular Article</topic></subject><identifier type="ISSN">2169-9275</identifier><identifier type="eISSN">2169-9291</identifier><identifier type="DOI">10.1002/(ISSN)2169-9291</identifier><identifier type="PublisherID">JGRC</identifier><part><date>2013</date><detail type="volume"><caption>vol.</caption><number>118</number></detail><detail type="issue"><caption>no.</caption><number>4</number></detail><extent unit="pages"><start>1940</start><end>1954</end><total>15</total></extent></part></relatedItem><identifier type="istex">6913325E4B5F23EF7C003E9D0DC67CF8612F7649</identifier><identifier type="DOI">10.1002/jgrc.20158</identifier><identifier type="ArticleID">JGRC20158</identifier><accessCondition type="use and reproduction" contentType="copyright">©2013. 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|texte= Sea ice motion and open water area at the Ronne Polynia, Antarctica: Synthetic aperture radar observations versus model results
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