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The response of the Bering Sea Gateway during the Mid-Pleistocene Transition

2017-11Journal article Restricted access
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dc.contributor.authorStroynowski, Zuzia
dc.contributor.authorAbrantes, Fatima
dc.contributor.authorBruno, Emanuela
dc.date.accessioned2019-11-20T15:07:12Z
dc.date.available2019-11-20T15:07:12Z
dc.date.issued2017-11
dc.description.abstractThe Mid-Pleistocene transition and the response of sea ice in the subarctic North Pacific are examined using a diatom record from the north eastern Bering Sea slope (IODP core U1344A). High percentages of diatom sea ice species in the assemblage foster the development of groupings specific to differing ice conditions. Thalassiosira antarctica var. borealis emerges as a key diatom species that delineates the development of thick multiannual sea ice and marks a series of advancements from 0.9 to1.2 Ma after which it dominates the assemblage until 0.6 Ma. The decline of Neodenticula seminae, indicative of Alaskan Stream water inflow, is in agreement with neighbouring core U1343E confirming the reduction of Bering Sea circulation after 0.9 Ma. We propose that during the MPT a stepped advancement of sea ice occurs in the Bering Sea as a response to increased moisture delivery to the high latitudes. An extended period of diatom productivity between 0.75 and 0.65 Ma, marks major de glacial conditions towards the end of the MPT by 0.6-0.55 Ma. The work highlights the important role played by sea ice and supports the contention of a colder MPT in the subarctic Pacific.
dc.description.sponsorshipFundacao para a Ciencia e a Tecnologia (FCT) project grant (PANOCEAN) [PTDC/AAA-CLI/112189/2009]
dc.identifier.doi10.1016/j.palaeo.2017.08.023
dc.identifier.issn0031-0182
dc.identifier.issn1872-616X
dc.identifier.urihttp://hdl.handle.net/10400.1/12930
dc.language.isoeng
dc.peerreviewedyes
dc.publisherElsevier Science Bv
dc.relationTHE PLIOCENE-PLEISTOCENE PALEOCENOGRAPHIC HISTORY OF THE BERING SEA INFERRED FROM DIATOMS
dc.subjectAsian Winter Monsoon
dc.subjectPleistocene climate transition
dc.subjectArctic Spring blooms
dc.subjectIodp Expedition 323
dc.subjectNorth Pacific
dc.subjectDiatom assemblages
dc.subjectSurface sediments
dc.subjectInterannual variability
dc.subjectPhysical oceanography
dc.subjectAntarctic Peninsula
dc.titleThe response of the Bering Sea Gateway during the Mid-Pleistocene Transition
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleTHE PLIOCENE-PLEISTOCENE PALEOCENOGRAPHIC HISTORY OF THE BERING SEA INFERRED FROM DIATOMS
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/COMPETE/PEst-C%2FMAR%2FLA0015%2F2013/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBPD%2F66462%2F2009/PT
oaire.citation.endPage985
oaire.citation.startPage974
oaire.citation.titlePalaeogeography Palaeoclimatology Palaeoecology
oaire.citation.volume485
oaire.fundingStreamCOMPETE
person.familyNameAbrantes
person.givenNameFatima
person.identifier.ciencia-id021D-CA76-20D2
person.identifier.orcid0000-0002-9110-0212
person.identifier.ridB-5985-2013
person.identifier.scopus-author-id16030759200
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsrestrictedAccess
rcaap.typearticle
relation.isAuthorOfPublication45b2d36a-1a11-4b6c-81b3-47f657904207
relation.isAuthorOfPublication.latestForDiscovery45b2d36a-1a11-4b6c-81b3-47f657904207
relation.isProjectOfPublication54af5688-34c3-4241-8c3e-ae96076831ff
relation.isProjectOfPublication74f202f5-af18-4bea-8da6-89b576898bec
relation.isProjectOfPublication.latestForDiscovery54af5688-34c3-4241-8c3e-ae96076831ff

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