Research Spotlight: No tipping point for Arctic Ocean ice
Identifieur interne : 000165 ( Istex/Corpus ); précédent : 000164; suivant : 000166Research Spotlight: No tipping point for Arctic Ocean ice
Auteurs : Colin SchultzSource :
- Eos, Transactions American Geophysical Union [ 0096-3941 ] ; 2011-03-08.
English descriptors
- KwdEn :
- Arctic, Arctic ocean, Arctic summer, Carbon cycle, Climate change, Climate models, Cultural legitimacy, Exergy, Geophysical, Geophysical research letters, Global carbon cycle, Goce, Gravity field, Greenhouse gases, Life cycle assessment, Lower atmosphere, Nitric, Nitric oxide, Nitric oxide emissions, Ocean currents.
- Teeft :
- Arctic, Arctic ocean, Arctic summer, Carbon cycle, Climate change, Climate models, Cultural legitimacy, Exergy, Geophysical, Geophysical research letters, Global carbon cycle, Goce, Gravity field, Greenhouse gases, Life cycle assessment, Lower atmosphere, Nitric, Nitric oxide, Nitric oxide emissions, Ocean currents.
Abstract
Declines in the summer sea ice extent have led to concerns within the scientific community that the Arctic Ocean may be nearing a tipping point, beyond which the sea ice cap could not recover. In such a scenario, greenhouse gases in the atmosphere trap outgoing radiation, and as the Sun beats down 24 hours a day during the Arctic summer, temperatures rise and melt what remains of the polar sea ice cap. The Arctic Ocean, now less reflective, would absorb more of the Sun's warmth, a feedback loop that would keep the ocean ice free. However, new research by Tietsche et al. suggests that even if the Arctic Ocean sees an ice‐free summer, it would not lead to catastrophic runaway ice melt. The researchers, using a general circulation model of the global ocean and the atmosphere, found that Arctic sea ice recovers within 2 years of an imposed ice‐free summer to the conditions dictated by general climate conditions during that time. Furthermore, they found that this quick recovery occurs whether the ice‐free summer is triggered in 2000 or in 2060, when global temperatures are predicted to be 2°C warmer. (Geophysical Research Letters, doi:10.1029/2010GL045698, 2011)
Url:
DOI: 10.1029/2011EO100014
Links to Exploration step
ISTEX:992E95EB1957F33846848B18906978F4B2F0E2B2Le document en format XML
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In such a scenario, greenhouse gases in the atmosphere trap outgoing radiation, and as the Sun beats down 24 hours a day during the Arctic summer, temperatures rise and melt what remains of the polar sea ice cap. The Arctic Ocean, now less reflective, would absorb more of the Sun's warmth, a feedback loop that would keep the ocean ice free. However, new research by Tietsche et al. suggests that even if the Arctic Ocean sees an ice‐free summer, it would not lead to catastrophic runaway ice melt. The researchers, using a general circulation model of the global ocean and the atmosphere, found that Arctic sea ice recovers within 2 years of an imposed ice‐free summer to the conditions dictated by general climate conditions during that time. Furthermore, they found that this quick recovery occurs whether the ice‐free summer is triggered in 2000 or in 2060, when global temperatures are predicted to be 2°C warmer. 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In such a scenario, greenhouse gases in the atmosphere trap outgoing radiation, and as the Sun beats down 24 hours a day during the Arctic summer, temperatures rise and melt what remains of the polar sea ice cap. The Arctic Ocean, now less reflective, would absorb more of the Sun's warmth, a feedback loop that would keep the ocean ice free. However, new research by <hi rend="italic">Tietsche et al.</hi> suggests that even if the Arctic Ocean sees an ice‐free summer, it would not lead to catastrophic runaway ice melt. The researchers, using a general circulation model of the global ocean and the atmosphere, found that Arctic sea ice recovers within 2 years of an imposed ice‐free summer to the conditions dictated by general climate conditions during that time. Furthermore, they found that this quick recovery occurs whether the ice‐free summer is triggered in 2000 or in 2060, when global temperatures are predicted to be 2°C warmer. 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AGU</journalTitle>, <vol>92</vol>(<issue>10</issue>), <pageFirst>88</pageFirst>.</citation></selfCitationGroup><linkGroup><link type="toTypesetVersion" href="file:EOST.EOST17705.pdf"></link></linkGroup></publicationMeta><contentMeta><countGroup><count type="wordTotal" number="1900"></count><count type="figureTotal" number="1"></count></countGroup><titleGroup><title type="main">Research Spotlight: No tipping point for Arctic Ocean ice</title><title type="shortAuthors">Schultz</title></titleGroup><creators><creator xml:id="eost17705-cr-0001" creatorRole="author" affiliationRef="#eost17705-aff-0001"><personName><givenNames>Colin</givenNames><familyName>Schultz</familyName></personName></creator></creators><affiliationGroup><affiliation xml:id="eost17705-aff-0001" countryCode="US" type="organization"><unparsedAffiliation>American Geophysical Union,Washington, D. C., USA</unparsedAffiliation></affiliation></affiliationGroup><keywordGroup type="author"><keyword xml:id="eost17705-kwd-0001">ice‐albedo feedback</keyword><keyword xml:id="eost17705-kwd-0002">sea ice</keyword><keyword xml:id="eost17705-kwd-0003">Arctic energy budget</keyword><keyword xml:id="eost17705-kwd-0004">tipping point</keyword></keywordGroup><abstractGroup><abstract type="main"><p xml:id="eost17705-para-0001" label="1">Declines in the summer sea ice extent have led to concerns within the scientific community that the Arctic Ocean may be nearing a tipping point, beyond which the sea ice cap could not recover. In such a scenario, greenhouse gases in the atmosphere trap outgoing radiation, and as the Sun beats down 24 hours a day during the Arctic summer, temperatures rise and melt what remains of the polar sea ice cap. The Arctic Ocean, now less reflective, would absorb more of the Sun's warmth, a feedback loop that would keep the ocean ice free. However, new research by <i>Tietsche et al.</i> suggests that even if the Arctic Ocean sees an ice‐free summer, it would not lead to catastrophic runaway ice melt. The researchers, using a general circulation model of the global ocean and the atmosphere, found that Arctic sea ice recovers within 2 years of an imposed ice‐free summer to the conditions dictated by general climate conditions during that time. Furthermore, they found that this quick recovery occurs whether the ice‐free summer is triggered in 2000 or in 2060, when global temperatures are predicted to be 2°C warmer. (<i>Geophysical Research Letters</i>, doi:10.1029/2010GL045698, 2011)</p></abstract></abstractGroup></contentMeta></header></component></istex:document></istex:metadataXml><mods version="3.6"><titleInfo lang="en"><title>Research Spotlight: No tipping point for Arctic Ocean ice</title></titleInfo><titleInfo type="alternative" contentType="CDATA" lang="en"><title>Research Spotlight: No tipping point for Arctic Ocean ice</title></titleInfo><name type="personal"><namePart type="given">Colin</namePart><namePart type="family">Schultz</namePart><affiliation>American Geophysical Union,Washington, D. C., USA</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">2011-03-08</dateIssued><edition>Schultz, C., (2011), Research Spotlight: No tipping point for Arctic Ocean ice, Eos Trans. AGU, 92(10), 88.</edition><copyrightDate encoding="w3cdtf">2011</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">1</extent><extent unit="words">1900</extent></physicalDescription><abstract>Declines in the summer sea ice extent have led to concerns within the scientific community that the Arctic Ocean may be nearing a tipping point, beyond which the sea ice cap could not recover. In such a scenario, greenhouse gases in the atmosphere trap outgoing radiation, and as the Sun beats down 24 hours a day during the Arctic summer, temperatures rise and melt what remains of the polar sea ice cap. The Arctic Ocean, now less reflective, would absorb more of the Sun's warmth, a feedback loop that would keep the ocean ice free. However, new research by Tietsche et al. suggests that even if the Arctic Ocean sees an ice‐free summer, it would not lead to catastrophic runaway ice melt. The researchers, using a general circulation model of the global ocean and the atmosphere, found that Arctic sea ice recovers within 2 years of an imposed ice‐free summer to the conditions dictated by general climate conditions during that time. Furthermore, they found that this quick recovery occurs whether the ice‐free summer is triggered in 2000 or in 2060, when global temperatures are predicted to be 2°C warmer. (Geophysical Research Letters, doi:10.1029/2010GL045698, 2011)</abstract><subject><genre>keywords</genre><topic>ice‐albedo feedback</topic><topic>sea ice</topic><topic>Arctic energy budget</topic><topic>tipping point</topic></subject><relatedItem type="host"><titleInfo><title>Eos, Transactions American Geophysical Union</title></titleInfo><titleInfo type="abbreviated"><title>Eos Trans. AGU</title></titleInfo><genre type="journal">journal</genre><subject><genre>index-terms</genre><topic authorityURI="http://psi.agu.org/taxonomy5/0300">ATMOSPHERIC COMPOSITION AND STRUCTURE</topic><topic authorityURI="http://psi.agu.org/taxonomy5/0312">Air/sea constituent fluxes</topic><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/taxonomy5/0764">Energy balance</topic><topic authorityURI="http://psi.agu.org/taxonomy5/1600">GLOBAL CHANGE</topic><topic authorityURI="http://psi.agu.org/taxonomy5/1605">Abrupt/rapid climate change</topic><topic authorityURI="http://psi.agu.org/taxonomy5/3300">ATMOSPHERIC PROCESSES</topic><topic authorityURI="http://psi.agu.org/taxonomy5/3339">Ocean/atmosphere interactions</topic><topic authorityURI="http://psi.agu.org/taxonomy5/4300">NATURAL HAZARDS</topic><topic authorityURI="http://psi.agu.org/taxonomy5/4301">Atmospheric</topic><topic authorityURI="http://psi.agu.org/taxonomy5/4500">OCEANOGRAPHY: PHYSICAL</topic><topic authorityURI="http://psi.agu.org/taxonomy5/4572">Upper ocean and mixed layer processes</topic><topic authorityURI="http://psi.agu.org/taxonomy5/4540">Ice mechanics and air/sea/ice exchange processes</topic><topic authorityURI="http://psi.agu.org/taxonomy5/4504">Air/sea interactions</topic><topic authorityURI="http://psi.agu.org/taxonomy5/4900">PALEOCEANOGRAPHY</topic><topic authorityURI="http://psi.agu.org/taxonomy5/4901">Abrupt/rapid climate change</topic><topic authorityURI="http://psi.agu.org/taxonomy5/8400">VOLCANOLOGY</topic><topic authorityURI="http://psi.agu.org/taxonomy5/8408">Volcano/climate interactions</topic></subject><subject><genre>article-category</genre><topic>Research spotlight</topic></subject><identifier type="ISSN">0096-3941</identifier><identifier type="eISSN">2324-9250</identifier><identifier type="DOI">10.1002/(ISSN)2324-9250</identifier><identifier type="CODEN">ETAGCT</identifier><identifier type="PublisherID">EOST</identifier><part><date>2011</date><detail type="volume"><caption>vol.</caption><number>92</number></detail><detail type="issue"><caption>no.</caption><number>10</number></detail><extent unit="pages"><start>88</start><end>88</end><total>1</total></extent></part></relatedItem><identifier type="istex">992E95EB1957F33846848B18906978F4B2F0E2B2</identifier><identifier type="DOI">10.1029/2011EO100014</identifier><identifier type="ArticleID">EOST17705</identifier><accessCondition type="use and reproduction" contentType="copyright">Copyright 2011 by the American Geophysical Union</accessCondition><recordInfo><recordContentSource>WILEY</recordContentSource></recordInfo></mods><json:item><extension>json</extension><original>false</original><mimetype>application/json</mimetype><uri>https://api.istex.fr/document/992E95EB1957F33846848B18906978F4B2F0E2B2/metadata/json</uri></json:item></metadata><serie></serie></istex></record>Pour manipuler ce document sous Unix (Dilib)
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