Wind‐driven shelf/basin exchange on an Arctic shelf: The joint roles of ice cover extent and shelf‐break bathymetry
Identifieur interne : 001197 ( Istex/Corpus ); précédent : 001196; suivant : 001198Wind‐driven shelf/basin exchange on an Arctic shelf: The joint roles of ice cover extent and shelf‐break bathymetry
Auteurs : Eddy Carmack ; David C. ChapmanSource :
- Geophysical Research Letters [ 0094-8276 ] ; 2003-07.
Abstract
The efficiency of shelf/basin exchange (SBE) in polar regions during summer is strongly moderated by the location of the ice edge relative to underlying topography. Numerical model calculations suggest that upwelling‐favorable winds generate very little SBE so long as the ice edge remains shoreward of the shelf break, but an abrupt onset of shelf‐break upwelling takes place when the ice edge retreats beyond the shelf break. A climatology (1968–2000) of ice conditions from the Canadian Shelf of the Beaufort Sea shows large interannual variability in ice edge extent and duration of ice‐free conditions in summer. Similarly, available hydrographic data reflect a corresponding variability in water mass properties. Under scenarios of climate warming associated with greenhouse gas build‐up, both the extent and duration of summer melt‐back are predicted to increase, and this may have dramatic impacts on SBE and biological productivity.
Url:
DOI: 10.1029/2003GL017526
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Numerical model calculations suggest that upwelling‐favorable winds generate very little SBE so long as the ice edge remains shoreward of the shelf break, but an abrupt onset of shelf‐break upwelling takes place when the ice edge retreats beyond the shelf break. A climatology (1968–2000) of ice conditions from the Canadian Shelf of the Beaufort Sea shows large interannual variability in ice edge extent and duration of ice‐free conditions in summer. Similarly, available hydrographic data reflect a corresponding variability in water mass properties. 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A climatology (1968–2000) of ice conditions from the Canadian Shelf of the Beaufort Sea shows large interannual variability in ice edge extent and duration of ice‐free conditions in summer. Similarly, available hydrographic data reflect a corresponding variability in water mass properties. 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C.</givenNames> <familyName>Chapman</familyName></author> (<pubYear year="2003">2003</pubYear>), <articleTitle>Wind‐driven shelf/basin exchange on an Arctic shelf: The joint roles of ice cover extent and shelf‐break bathymetry</articleTitle>, <journalTitle>Geophys. Res. Lett.</journalTitle>, <vol>30</vol>, 1778, doi:<accessionId ref="info:doi/10.1029/2003GL017526">10.1029/2003GL017526</accessionId>, <issue>14</issue>.</citation></selfCitationGroup><linkGroup><link type="toTypesetVersion" href="file:GRL.GRL17075.pdf"></link></linkGroup></publicationMeta><contentMeta><countGroup><count type="figureTotal" number="5"></count></countGroup><titleGroup><title type="main">Wind‐driven shelf/basin exchange on an Arctic shelf: The joint roles of ice cover extent and shelf‐break bathymetry</title><title type="short">WIND‐DRIVEN SHELF/BASIN EXCHANGE</title><title type="shortAuthors">Carmack and Chapman</title></titleGroup><creators><creator creatorRole="author" xml:id="grl17075-cr-0001" affiliationRef="#grl17075-aff-0001"><personName><givenNames>Eddy</givenNames> <familyName>Carmack</familyName></personName></creator><creator creatorRole="author" xml:id="grl17075-cr-0002" affiliationRef="#grl17075-aff-0002"><personName><givenNames>David C.</givenNames> <familyName>Chapman</familyName></personName><contactDetails><email normalForm="dchapman@whoi.edu">dchapman@whoi.edu</email></contactDetails></creator></creators><affiliationGroup><affiliation countryCode="CA" type="organization" xml:id="grl17075-aff-0001"><orgName>Institute of Ocean Sciences</orgName><address><city>Sidney, BC</city><country>Canada</country></address></affiliation><affiliation countryCode="US" type="organization" xml:id="grl17075-aff-0002"><orgName>Woods Hole Oceanographic Institution</orgName><address><city>Woods Hole</city><countryPart>Massachusetts</countryPart><country>USA</country></address></affiliation></affiliationGroup><abstractGroup><abstract type="main"><p xml:id="grl17075-para-0001" label="1">The efficiency of shelf/basin exchange (SBE) in polar regions during summer is strongly moderated by the location of the ice edge relative to underlying topography. Numerical model calculations suggest that upwelling‐favorable winds generate very little SBE so long as the ice edge remains shoreward of the shelf break, but an abrupt onset of shelf‐break upwelling takes place when the ice edge retreats beyond the shelf break. A climatology (1968–2000) of ice conditions from the Canadian Shelf of the Beaufort Sea shows large interannual variability in ice edge extent and duration of ice‐free conditions in summer. Similarly, available hydrographic data reflect a corresponding variability in water mass properties. Under scenarios of climate warming associated with greenhouse gas build‐up, both the extent and duration of summer melt‐back are predicted to increase, and this may have dramatic impacts on SBE and biological productivity.</p></abstract></abstractGroup></contentMeta></header></component></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Wind‐driven shelf/basin exchange on an Arctic shelf: The joint roles of ice cover extent and shelf‐break bathymetry</title></titleInfo><titleInfo type="abbreviated" lang="en"><title>WIND‐DRIVEN SHELF/BASIN EXCHANGE</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>Wind‐driven shelf/basin exchange on an Arctic shelf: The joint roles of ice cover extent and shelf‐break bathymetry</title></titleInfo><name type="personal"><namePart type="given">Eddy</namePart><namePart type="family">Carmack</namePart><affiliation>Institute of Ocean Sciences, Sidney, BC, Canada</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">David C.</namePart><namePart type="family">Chapman</namePart><affiliation>Woods Hole Oceanographic Institution, Massachusetts, Woods Hole, USA</affiliation><affiliation>E-mail: dchapman@whoi.edu</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">2003-07</dateIssued><dateCaptured encoding="w3cdtf">2003-06-01</dateCaptured><dateValid encoding="w3cdtf">2003-06-30</dateValid><edition>Carmack, E., and D. C. Chapman (2003), Wind‐driven shelf/basin exchange on an Arctic shelf: The joint roles of ice cover extent and shelf‐break bathymetry, Geophys. Res. Lett., 30, 1778, doi:10.1029/2003GL017526, 14.</edition><copyrightDate encoding="w3cdtf">2003</copyrightDate></originInfo><language><languageTerm type="code" authority="rfc3066">en</languageTerm><languageTerm type="code" authority="iso639-2b">eng</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType><extent unit="figures">5</extent></physicalDescription><abstract>The efficiency of shelf/basin exchange (SBE) in polar regions during summer is strongly moderated by the location of the ice edge relative to underlying topography. Numerical model calculations suggest that upwelling‐favorable winds generate very little SBE so long as the ice edge remains shoreward of the shelf break, but an abrupt onset of shelf‐break upwelling takes place when the ice edge retreats beyond the shelf break. A climatology (1968–2000) of ice conditions from the Canadian Shelf of the Beaufort Sea shows large interannual variability in ice edge extent and duration of ice‐free conditions in summer. Similarly, available hydrographic data reflect a corresponding variability in water mass properties. Under scenarios of climate warming associated with greenhouse gas build‐up, both the extent and duration of summer melt‐back are predicted to increase, and this may have dramatic impacts on SBE and biological productivity.</abstract><relatedItem type="host"><titleInfo><title>Geophysical Research Letters</title></titleInfo><titleInfo type="abbreviated"><title>Geophys. Res. Lett.</title></titleInfo><genre type="journal">journal</genre><subject><genre>index-terms</genre><topic authorityURI="http://psi.agu.org/taxonomy5/1600">GLOBAL CHANGE</topic><topic authorityURI="http://psi.agu.org/taxonomy5/1616">Climate variability</topic><topic authorityURI="http://psi.agu.org/taxonomy5/1635">Oceans</topic><topic authorityURI="http://psi.agu.org/taxonomy5/3000">MARINE GEOLOGY AND GEOPHYSICS</topic><topic authorityURI="http://psi.agu.org/taxonomy5/3002">Continental shelf and slope processes</topic><topic authorityURI="http://psi.agu.org/taxonomy5/3300">ATMOSPHERIC PROCESSES</topic><topic authorityURI="http://psi.agu.org/taxonomy5/3305">Climate change and variability</topic><topic authorityURI="http://psi.agu.org/taxonomy5/3309">Climatology</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/taxonomy5/4219">Continental shelf and slope processes</topic><topic authorityURI="http://psi.agu.org/taxonomy5/4279">Upwelling and convergences</topic><topic authorityURI="http://psi.agu.org/taxonomy5/4215">Climate and interannual variability</topic><topic authorityURI="http://psi.agu.org/taxonomy5/4500">OCEANOGRAPHY: PHYSICAL</topic><topic authorityURI="http://psi.agu.org/taxonomy5/4513">Decadal ocean variability</topic><topic authorityURI="http://psi.agu.org/taxonomy5/4900">PALEOCEANOGRAPHY</topic><topic authorityURI="http://psi.agu.org/taxonomy5/4964">Upwelling</topic><topic authorityURI="http://psi.agu.org/taxonomy5/9300">GEOGRAPHIC LOCATION</topic><topic authorityURI="http://psi.agu.org/taxonomy5/9310">Antarctica</topic><topic authorityURI="http://psi.agu.org/taxonomy5/9315">Arctic region</topic></subject><subject><genre>article-category</genre><topic>Oceans</topic></subject><identifier type="ISSN">0094-8276</identifier><identifier type="eISSN">1944-8007</identifier><identifier type="DOI">10.1002/(ISSN)1944-8007</identifier><identifier type="CODEN">GPRLAJ</identifier><identifier type="PublisherID">GRL</identifier><part><date>2003</date><detail type="volume"><caption>vol.</caption><number>30</number></detail><detail type="issue"><caption>no.</caption><number>14</number></detail><extent unit="pages"><start>n/a</start><end>n/a</end><total>4</total></extent></part></relatedItem><identifier type="istex">43849B4C755FE52B1E5EE31C991FA02CE088A299</identifier><identifier type="DOI">10.1029/2003GL017526</identifier><identifier type="ArticleID">2003GL017526</identifier><accessCondition type="use and reproduction" contentType="copyright">Copyright 2003 by the American Geophysical Union.</accessCondition><recordInfo><recordContentSource>WILEY</recordContentSource></recordInfo></mods></metadata><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
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