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dc.contributor.authorKeigwin, Lloyd D.  Concept link
dc.contributor.authorBoyle, Edward A.  Concept link
dc.date.accessioned2010-05-13T19:27:40Z
dc.date.available2010-05-13T19:27:40Z
dc.date.issued2008-01-31
dc.identifier.citationPaleoceanography 23 (2008): PA1101en_US
dc.identifier.urihttps://hdl.handle.net/1912/3455
dc.descriptionAuthor Posting. © American Geophysical Union, 2008. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Paleoceanography 23 (2008): PA1101, doi:10.1029/2007PA001500.en_US
dc.description.abstractModels indicate that a complete shutdown of deep and intermediate water production is a possible consequence of extreme climate conditions in the northern North Atlantic, and the high ratio of 231Pa to 230Th on Bermuda Rise is evidence that this might have happened ∼17 ka during Heinrich event 1 (H1). However, new radiocarbon data from bivalves that lived at ∼4.6 km on the Bermuda Rise during H1 lead to a different conclusion. The bivalve data do indeed indicate ventilation of the deep western North Atlantic was suppressed during H1 but not as much as it was during the last glacial maximum. We propose that high diatom flux to the Bermuda Rise during H1 is at least in part responsible for increased 231Pa/230Th at that time. Although we cannot say for sure why opal production was so high in a gyre center location at that time, increased leakage of silica rich waters from the Southern Ocean to the North Atlantic is one possibility.en_US
dc.description.sponsorshipThis work was funded by a grant from the Comer Foundation to WHOI’s Ocean and Climate Change Institute.en_US
dc.format.mimetypeapplication/pdf
dc.language.isoen_USen_US
dc.publisherAmerican Geophysical Unionen_US
dc.relation.urihttps://doi.org/10.1029/2007PA001500
dc.subjectNorth Atlantic Oceanen_US
dc.subjectMeridional overturningen_US
dc.subjectHeinrich eventen_US
dc.titleDid North Atlantic overturning halt 17,000 years ago?en_US
dc.typeArticleen_US
dc.identifier.doi10.1029/2007PA001500


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