Early Holocene Laurentide Ice Sheet deglaciation causes cooling in the high‐latitude Southern Hemisphere through oceanic teleconnection
Identifieur interne : 001C05 ( Main/Exploration ); précédent : 001C04; suivant : 001C06Early Holocene Laurentide Ice Sheet deglaciation causes cooling in the high‐latitude Southern Hemisphere through oceanic teleconnection
Auteurs : H. Renssen [Pays-Bas] ; H. Goosse [Belgique] ; X. Crosta [France] ; D. M. Roche [Pays-Bas, France]Source :
- Paleoceanography [ 0883-8305 ] ; 2010-09.
Abstract
The impact of the early Holocene Laurentide Ice Sheet (LIS) deglaciation on the climate at Southern Hemisphere high latitudes is studied in three transient simulations performed with a global climate model of the coupled atmosphere‐ocean‐vegetation system. Considering the LIS deglaciation, we quantify separately the impacts of the background meltwater fluxes and the changes in topography and surface albedo. In our model, the meltwater input into the North Atlantic results in a substantial weakening of the Atlantic meridional overturning circulation, associated with absence of deep convection in the Labrador Sea. Northward ocean heat transport by the Atlantic Ocean is reduced by 28%. This weakened ocean circulation leads to cooler North Atlantic Deep Water (NADW). Upwelling of this cool NADW in the Southern Ocean results in reduced surface temperatures (by 1°C to 2°C) here between 9 and 7 ka compared to an experiment without LIS deglaciation. Poleward of the polar front zone, this advective teleconnection between the Southern and Northern hemispheres overwhelms the effect of the “classical” bipolar seesaw mechanism. These results provide an explanation for the relatively cold climatic conditions between 9 and 7 ka reconstructed in several proxy records from Southern Hemisphere high latitudes, such as Antarctic ice cores.
Url:
DOI: 10.1029/2009PA001854
Affiliations:
- Belgique, France, Pays-Bas
- Aquitaine, Aquitaine-Limousin-Poitou-Charentes, Hollande-Septentrionale, Province du Brabant wallon, Région wallonne
- Amsterdam, Bordeaux, Louvain-la-Neuve, Talence
- Université catholique de Louvain
Links toward previous steps (curation, corpus...)
- to stream Istex, to step Corpus: 001835
- to stream Istex, to step Curation: 001833
- to stream Istex, to step Checkpoint: 000548
- to stream Main, to step Merge: 001D21
- to stream Main, to step Curation: 001C05
Le document en format XML
<record><TEI wicri:istexFullTextTei="biblStruct"><teiHeader><fileDesc><titleStmt><title xml:lang="en">Early Holocene Laurentide Ice Sheet deglaciation causes cooling in the high‐latitude Southern Hemisphere through oceanic teleconnection</title><author><name sortKey="Renssen, H" sort="Renssen, H" uniqKey="Renssen H" first="H." last="Renssen">H. Renssen</name></author><author><name sortKey="Goosse, H" sort="Goosse, H" uniqKey="Goosse H" first="H." last="Goosse">H. Goosse</name></author><author><name sortKey="Crosta, X" sort="Crosta, X" uniqKey="Crosta X" first="X." last="Crosta">X. Crosta</name></author><author><name sortKey="Roche, D M" sort="Roche, D M" uniqKey="Roche D" first="D. M." last="Roche">D. M. Roche</name></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:D748C32A26B89660AD7D2A65E72E3075FE42E06B</idno><date when="2010" year="2010">2010</date><idno type="doi">10.1029/2009PA001854</idno><idno type="url">https://api.istex.fr/document/D748C32A26B89660AD7D2A65E72E3075FE42E06B/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">001835</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Corpus" wicri:corpus="ISTEX">001835</idno><idno type="wicri:Area/Istex/Curation">001833</idno><idno type="wicri:Area/Istex/Checkpoint">000548</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Checkpoint">000548</idno><idno type="wicri:doubleKey">0883-8305:2010:Renssen H:early:holocene:laurentide</idno><idno type="wicri:Area/Main/Merge">001D21</idno><idno type="wicri:Area/Main/Curation">001C05</idno><idno type="wicri:Area/Main/Exploration">001C05</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a" type="main" xml:lang="en">Early Holocene Laurentide Ice Sheet deglaciation causes cooling in the high‐latitude Southern Hemisphere through oceanic teleconnection</title><author><name sortKey="Renssen, H" sort="Renssen, H" uniqKey="Renssen H" first="H." last="Renssen">H. Renssen</name><affiliation wicri:level="3"><country xml:lang="fr">Pays-Bas</country><wicri:regionArea>Section Climate Change and Landscape Dynamics, Department of Earth Sciences, Faculty of Earth and Life Sciences, VU University Amsterdam, Amsterdam</wicri:regionArea><placeName><settlement type="city">Amsterdam</settlement><region nuts="2" type="province">Hollande-Septentrionale</region></placeName></affiliation><affiliation wicri:level="1"><country wicri:rule="url">Pays-Bas</country></affiliation></author><author><name sortKey="Goosse, H" sort="Goosse, H" uniqKey="Goosse H" first="H." last="Goosse">H. Goosse</name><affiliation wicri:level="4"><country xml:lang="fr">Belgique</country><wicri:regionArea>Institut d'Astronomie et de Géophysique Georges Lemaître, Université Catholique de Louvain, Louvain‐la‐Neuve</wicri:regionArea><orgName type="university">Université catholique de Louvain</orgName><placeName><settlement type="city">Louvain-la-Neuve</settlement><region type="region" nuts="1">Région wallonne</region><region type="province" nuts="1">Province du Brabant wallon</region></placeName></affiliation></author><author><name sortKey="Crosta, X" sort="Crosta, X" uniqKey="Crosta X" first="X." last="Crosta">X. Crosta</name><affiliation wicri:level="3"><country xml:lang="fr">France</country><wicri:regionArea>EPOC, UMR 5805, Université Bordeaux 1, CNRS, Talence</wicri:regionArea><placeName><region type="region" nuts="2">Aquitaine-Limousin-Poitou-Charentes</region><region type="old region" nuts="2">Aquitaine</region><settlement type="city">Talence</settlement><settlement type="city" wicri:auto="agglo">Bordeaux</settlement></placeName></affiliation></author><author><name sortKey="Roche, D M" sort="Roche, D M" uniqKey="Roche D" first="D. M." last="Roche">D. M. Roche</name><affiliation wicri:level="3"><country xml:lang="fr">Pays-Bas</country><wicri:regionArea>Section Climate Change and Landscape Dynamics, Department of Earth Sciences, Faculty of Earth and Life Sciences, VU University Amsterdam, Amsterdam</wicri:regionArea><placeName><settlement type="city">Amsterdam</settlement><region nuts="2" type="province">Hollande-Septentrionale</region></placeName></affiliation><affiliation wicri:level="1"><country xml:lang="fr">France</country><wicri:regionArea>Laboratoire des Sciences du Climat et de l'Environnement, IPSL, Laboratoire CEA, INSU, UVSQ, CNRS, Gif‐sur‐Yvette</wicri:regionArea><wicri:noRegion>Gif‐sur‐Yvette</wicri:noRegion><wicri:noRegion>Gif‐sur‐Yvette</wicri:noRegion></affiliation></author></analytic><monogr></monogr><series><title level="j">Paleoceanography</title><title level="j" type="abbrev">Paleoceanography</title><idno type="ISSN">0883-8305</idno><idno type="eISSN">1944-9186</idno><imprint><publisher>Blackwell Publishing Ltd</publisher><date type="published" when="2010-09">2010-09</date><biblScope unit="volume">25</biblScope><biblScope unit="issue">3</biblScope><biblScope unit="page" from="/">n/a</biblScope><biblScope unit="page" to="/">n/a</biblScope></imprint><idno type="ISSN">0883-8305</idno></series><idno type="istex">D748C32A26B89660AD7D2A65E72E3075FE42E06B</idno><idno type="DOI">10.1029/2009PA001854</idno><idno type="ArticleID">2009PA001854</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0883-8305</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract">The impact of the early Holocene Laurentide Ice Sheet (LIS) deglaciation on the climate at Southern Hemisphere high latitudes is studied in three transient simulations performed with a global climate model of the coupled atmosphere‐ocean‐vegetation system. Considering the LIS deglaciation, we quantify separately the impacts of the background meltwater fluxes and the changes in topography and surface albedo. In our model, the meltwater input into the North Atlantic results in a substantial weakening of the Atlantic meridional overturning circulation, associated with absence of deep convection in the Labrador Sea. Northward ocean heat transport by the Atlantic Ocean is reduced by 28%. This weakened ocean circulation leads to cooler North Atlantic Deep Water (NADW). Upwelling of this cool NADW in the Southern Ocean results in reduced surface temperatures (by 1°C to 2°C) here between 9 and 7 ka compared to an experiment without LIS deglaciation. Poleward of the polar front zone, this advective teleconnection between the Southern and Northern hemispheres overwhelms the effect of the “classical” bipolar seesaw mechanism. These results provide an explanation for the relatively cold climatic conditions between 9 and 7 ka reconstructed in several proxy records from Southern Hemisphere high latitudes, such as Antarctic ice cores.</div></front></TEI><affiliations><list><country><li>Belgique</li><li>France</li><li>Pays-Bas</li></country><region><li>Aquitaine</li><li>Aquitaine-Limousin-Poitou-Charentes</li><li>Hollande-Septentrionale</li><li>Province du Brabant wallon</li><li>Région wallonne</li></region><settlement><li>Amsterdam</li><li>Bordeaux</li><li>Louvain-la-Neuve</li><li>Talence</li></settlement><orgName><li>Université catholique de Louvain</li></orgName></list><tree><country name="Pays-Bas"><region name="Hollande-Septentrionale"><name sortKey="Renssen, H" sort="Renssen, H" uniqKey="Renssen H" first="H." last="Renssen">H. Renssen</name></region><name sortKey="Renssen, H" sort="Renssen, H" uniqKey="Renssen H" first="H." last="Renssen">H. Renssen</name><name sortKey="Roche, D M" sort="Roche, D M" uniqKey="Roche D" first="D. M." last="Roche">D. M. Roche</name></country><country name="Belgique"><region name="Région wallonne"><name sortKey="Goosse, H" sort="Goosse, H" uniqKey="Goosse H" first="H." last="Goosse">H. Goosse</name></region></country><country name="France"><region name="Aquitaine-Limousin-Poitou-Charentes"><name sortKey="Crosta, X" sort="Crosta, X" uniqKey="Crosta X" first="X." last="Crosta">X. Crosta</name></region><name sortKey="Roche, D M" sort="Roche, D M" uniqKey="Roche D" first="D. M." last="Roche">D. M. Roche</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
EXPLOR_STEP=$WICRI_ROOT/Wicri/Sante/explor/ParkinsonFranceV1/Data/Main/Exploration
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 001C05 | SxmlIndent | more
Ou
HfdSelect -h $EXPLOR_AREA/Data/Main/Exploration/biblio.hfd -nk 001C05 | SxmlIndent | more
Pour mettre un lien sur cette page dans le réseau Wicri
{{Explor lien
|wiki= Wicri/Sante
|area= ParkinsonFranceV1
|flux= Main
|étape= Exploration
|type= RBID
|clé= ISTEX:D748C32A26B89660AD7D2A65E72E3075FE42E06B
|texte= Early Holocene Laurentide Ice Sheet deglaciation causes cooling in the high‐latitude Southern Hemisphere through oceanic teleconnection
}}
| This area was generated with Dilib version V0.6.29. |  |