Western Arctic Ocean temperature variability during the last 8000 years
Identifieur interne : 000349 ( Istex/Checkpoint ); précédent : 000348; suivant : 000350Western Arctic Ocean temperature variability during the last 8000 years
Auteurs : Jesse R. Farmer [États-Unis] ; Thomas M. Cronin [États-Unis] ; Anne De Vernal [Canada] ; Gary S. Dwyer [États-Unis] ; Lloyd D. Keigwin [États-Unis] ; Robert C. Thunell [États-Unis]Source :
- Geophysical Research Letters [ 0094-8276 ] ; 2011-12-28.
Abstract
We reconstructed subsurface (∼200–400 m) ocean temperature and sea‐ice cover in the Canada Basin, western Arctic Ocean from foraminiferal δ18O, ostracode Mg/Ca ratios, and dinocyst assemblages from two sediment core records covering the last 8000 years. Results show mean temperature varied from −1 to 0.5°C and −0.5 to 1.5°C at 203 and 369 m water depths, respectively. Centennial‐scale warm periods in subsurface temperature records correspond to reductions in summer sea‐ice cover inferred from dinocyst assemblages around 6.5 ka, 3.5 ka, 1.8 ka and during the 15th century Common Era. These changes may reflect centennial changes in the temperature and/or strength of inflowing Atlantic Layer water originating in the eastern Arctic Ocean. By comparison, the 0.5 to 0.7°C warm temperature anomaly identified in oceanographic records from the Atlantic Layer of the Canada Basin exceeded reconstructed Atlantic Layer temperatures for the last 1200 years by about 0.5°C.
Url:
DOI: 10.1029/2011GL049714
Affiliations:
Links toward previous steps (curation, corpus...)
Links to Exploration step
ISTEX:0F66BB056E72D3D01B4CE3A5EDF105A8FB691232Le document en format XML
<record><TEI wicri:istexFullTextTei="biblStruct"><teiHeader><fileDesc><titleStmt><title xml:lang="en">Western Arctic Ocean temperature variability during the last 8000 years</title><author><name sortKey="Farmer, Jesse R" sort="Farmer, Jesse R" uniqKey="Farmer J" first="Jesse R." last="Farmer">Jesse R. Farmer</name></author><author><name sortKey="Cronin, Thomas M" sort="Cronin, Thomas M" uniqKey="Cronin T" first="Thomas M." last="Cronin">Thomas M. Cronin</name></author><author><name sortKey="De Vernal, Anne" sort="De Vernal, Anne" uniqKey="De Vernal A" first="Anne" last="De Vernal">Anne De Vernal</name></author><author><name sortKey="Dwyer, Gary S" sort="Dwyer, Gary S" uniqKey="Dwyer G" first="Gary S." last="Dwyer">Gary S. Dwyer</name></author><author><name sortKey="Keigwin, Lloyd D" sort="Keigwin, Lloyd D" uniqKey="Keigwin L" first="Lloyd D." last="Keigwin">Lloyd D. Keigwin</name></author><author><name sortKey="Thunell, Robert C" sort="Thunell, Robert C" uniqKey="Thunell R" first="Robert C." last="Thunell">Robert C. Thunell</name></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:0F66BB056E72D3D01B4CE3A5EDF105A8FB691232</idno><date when="2011" year="2011">2011</date><idno type="doi">10.1029/2011GL049714</idno><idno type="url">https://api-v5.istex.fr/document/0F66BB056E72D3D01B4CE3A5EDF105A8FB691232/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">001D53</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Corpus" wicri:corpus="ISTEX">001D53</idno><idno type="wicri:Area/Istex/Curation">001D53</idno><idno type="wicri:Area/Istex/Checkpoint">000349</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Checkpoint">000349</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a" type="main" xml:lang="en">Western Arctic Ocean temperature variability during the last 8000 years</title><author><name sortKey="Farmer, Jesse R" sort="Farmer, Jesse R" uniqKey="Farmer J" first="Jesse R." last="Farmer">Jesse R. Farmer</name><affiliation wicri:level="2"><country xml:lang="fr">États-Unis</country><wicri:regionArea>U.S. Geological Survey, Reston, Virginia</wicri:regionArea><placeName><region type="state">Virginie</region></placeName></affiliation><affiliation wicri:level="2"><country xml:lang="fr" wicri:curation="lc">États-Unis</country><wicri:regionArea>Now at Lamont‐Doherty Earth Observatory, Earth Institute at Columbia University, Palisades, New York</wicri:regionArea><placeName><region type="state">État de New York</region></placeName></affiliation><affiliation wicri:level="1"><country wicri:rule="url">États-Unis</country></affiliation></author><author><name sortKey="Cronin, Thomas M" sort="Cronin, Thomas M" uniqKey="Cronin T" first="Thomas M." last="Cronin">Thomas M. Cronin</name><affiliation wicri:level="1"><country xml:lang="fr">États-Unis</country><wicri:regionArea>U.S. Geological Survey, Virginia, Reston</wicri:regionArea><wicri:noRegion>Reston</wicri:noRegion></affiliation></author><author><name sortKey="De Vernal, Anne" sort="De Vernal, Anne" uniqKey="De Vernal A" first="Anne" last="De Vernal">Anne De Vernal</name><affiliation wicri:level="1"><country xml:lang="fr">Canada</country><wicri:regionArea>GEOTOP‐UQAM‐McGill, Montreal, Quebec</wicri:regionArea><wicri:noRegion>Quebec</wicri:noRegion></affiliation></author><author><name sortKey="Dwyer, Gary S" sort="Dwyer, Gary S" uniqKey="Dwyer G" first="Gary S." last="Dwyer">Gary S. Dwyer</name><affiliation wicri:level="1"><country xml:lang="fr">États-Unis</country><wicri:regionArea>Division of Earth and Ocean Sciences, Nicholas School of the Environment, Duke University, North Carolina, Durham</wicri:regionArea><wicri:noRegion>Durham</wicri:noRegion></affiliation></author><author><name sortKey="Keigwin, Lloyd D" sort="Keigwin, Lloyd D" uniqKey="Keigwin L" first="Lloyd D." last="Keigwin">Lloyd D. Keigwin</name><affiliation wicri:level="1"><country xml:lang="fr">États-Unis</country><wicri:regionArea>Woods Hole Oceanographic Institution, Massachusetts, Woods Hole</wicri:regionArea><wicri:noRegion>Woods Hole</wicri:noRegion></affiliation></author><author><name sortKey="Thunell, Robert C" sort="Thunell, Robert C" uniqKey="Thunell R" first="Robert C." last="Thunell">Robert C. Thunell</name><affiliation wicri:level="1"><country xml:lang="fr">États-Unis</country><wicri:regionArea>Department of Earth and Ocean Sciences, University of South Carolina, South Carolina, Columbia</wicri:regionArea><wicri:noRegion>Columbia</wicri:noRegion></affiliation></author></analytic><monogr></monogr><series><title level="j">Geophysical Research Letters</title><title level="j" type="abbrev">Geophys. Res. Lett.</title><idno type="ISSN">0094-8276</idno><idno type="eISSN">1944-8007</idno><imprint><publisher>Blackwell Publishing Ltd</publisher><date type="published" when="2011-12-28">2011-12-28</date><biblScope unit="volume">38</biblScope><biblScope unit="issue">24</biblScope><biblScope unit="page" from="/">n/a</biblScope><biblScope unit="page" to="/">n/a</biblScope></imprint><idno type="ISSN">0094-8276</idno></series><idno type="istex">0F66BB056E72D3D01B4CE3A5EDF105A8FB691232</idno><idno type="DOI">10.1029/2011GL049714</idno><idno type="ArticleID">2011GL049714</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0094-8276</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract">We reconstructed subsurface (∼200–400 m) ocean temperature and sea‐ice cover in the Canada Basin, western Arctic Ocean from foraminiferal δ18O, ostracode Mg/Ca ratios, and dinocyst assemblages from two sediment core records covering the last 8000 years. Results show mean temperature varied from −1 to 0.5°C and −0.5 to 1.5°C at 203 and 369 m water depths, respectively. Centennial‐scale warm periods in subsurface temperature records correspond to reductions in summer sea‐ice cover inferred from dinocyst assemblages around 6.5 ka, 3.5 ka, 1.8 ka and during the 15th century Common Era. These changes may reflect centennial changes in the temperature and/or strength of inflowing Atlantic Layer water originating in the eastern Arctic Ocean. By comparison, the 0.5 to 0.7°C warm temperature anomaly identified in oceanographic records from the Atlantic Layer of the Canada Basin exceeded reconstructed Atlantic Layer temperatures for the last 1200 years by about 0.5°C.</div></front></TEI><affiliations><list><country><li>Canada</li><li>États-Unis</li></country><region><li>Virginie</li><li>État de New York</li></region></list><tree><country name="États-Unis"><region name="Virginie"><name sortKey="Farmer, Jesse R" sort="Farmer, Jesse R" uniqKey="Farmer J" first="Jesse R." last="Farmer">Jesse R. Farmer</name></region><name sortKey="Cronin, Thomas M" sort="Cronin, Thomas M" uniqKey="Cronin T" first="Thomas M." last="Cronin">Thomas M. Cronin</name><name sortKey="Dwyer, Gary S" sort="Dwyer, Gary S" uniqKey="Dwyer G" first="Gary S." last="Dwyer">Gary S. Dwyer</name><name sortKey="Farmer, Jesse R" sort="Farmer, Jesse R" uniqKey="Farmer J" first="Jesse R." last="Farmer">Jesse R. Farmer</name><name sortKey="Farmer, Jesse R" sort="Farmer, Jesse R" uniqKey="Farmer J" first="Jesse R." last="Farmer">Jesse R. Farmer</name><name sortKey="Keigwin, Lloyd D" sort="Keigwin, Lloyd D" uniqKey="Keigwin L" first="Lloyd D." last="Keigwin">Lloyd D. Keigwin</name><name sortKey="Thunell, Robert C" sort="Thunell, Robert C" uniqKey="Thunell R" first="Robert C." last="Thunell">Robert C. Thunell</name></country><country name="Canada"><noRegion><name sortKey="De Vernal, Anne" sort="De Vernal, Anne" uniqKey="De Vernal A" first="Anne" last="De Vernal">Anne De Vernal</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
EXPLOR_STEP=$WICRI_ROOT/Wicri/Canada/explor/ParkinsonCanadaV1/Data/Istex/Checkpoint
HfdSelect -h $EXPLOR_STEP/biblio.hfd -nk 000349 | SxmlIndent | more
Ou
HfdSelect -h $EXPLOR_AREA/Data/Istex/Checkpoint/biblio.hfd -nk 000349 | SxmlIndent | more
Pour mettre un lien sur cette page dans le réseau Wicri
{{Explor lien
|wiki= Wicri/Canada
|area= ParkinsonCanadaV1
|flux= Istex
|étape= Checkpoint
|type= RBID
|clé= ISTEX:0F66BB056E72D3D01B4CE3A5EDF105A8FB691232
|texte= Western Arctic Ocean temperature variability during the last 8000 years
}}
| This area was generated with Dilib version V0.6.29. |  |