Show simple item record

dc.contributor.authorFarmer, Jesse R.
dc.contributor.authorCronin, Thomas M.
dc.contributor.authorde Vernal, Anne
dc.contributor.authorDwyer, Gary S.
dc.contributor.authorKeigwin, Lloyd D.
dc.contributor.authorThunell, Robert C.
dc.date.accessioned2012-01-23T19:55:54Z
dc.date.available2014-10-22T08:57:25Z
dc.date.issued2011-12-17
dc.identifier.citationGeophysical Research Letters 38 (2011): L24602en_US
dc.identifier.urihttp://hdl.handle.net/1912/4989
dc.descriptionAuthor Posting. © American Geophysical Union, 2011. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geophysical Research Letters 38 (2011): L24602, doi:10.1029/2011GL049714.en_US
dc.description.abstractWe 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.en_US
dc.description.sponsorshipJ.R.F., T.M.C., and R.C.T. thank support by USGS Global Change Program, G.S.D. thanks support from the USGS Global Change Program and the NSF Office of Polar Programs, A.d.V. thanks support by Fond québécois de la recherché sur la nature et les technologies (FQRNT) and the Ministere du Développement économique, innovation et exportation (MDEIE) of Quebec.en_US
dc.format.mimetypeapplication/postscript
dc.format.mimetypetext/plain
dc.format.mimetypeapplication/pdf
dc.language.isoen_USen_US
dc.publisherAmerican Geophysical Unionen_US
dc.relation.urihttps://doi.org/10.1029/2011GL049714
dc.subjectArctic Oceanen_US
dc.subjectAtlantic Layeren_US
dc.subjectTemperatureen_US
dc.subjectVariabilityen_US
dc.titleWestern Arctic Ocean temperature variability during the last 8000 yearsen_US
dc.typeArticleen_US
dc.description.embargo2012-06-17
dc.identifier.doi10.1029/2011GL049714


Files in this item

Thumbnail
Thumbnail
Thumbnail
Thumbnail
Thumbnail
Thumbnail
Thumbnail

This item appears in the following Collection(s)

Show simple item record