Sea-ice response to climate change in the Bering Sea during the Mid-Pleistocene Transition
dc.contributor.author | Worne, S | |
dc.contributor.author | Stroynowski, Z | |
dc.contributor.author | Kender, S | |
dc.contributor.author | Swann, GEA | |
dc.date.accessioned | 2021-04-15T13:45:08Z | |
dc.date.issued | 2021-04-07 | |
dc.description.abstract | Sea-ice is believed to be an important control on climatic changes through the Mid-Pleistocene Transition (MPT; 0.6–1.2 Ma). However, the low resolution/short timescale of existing reconstructions prevents a full evaluation of these dynamics. Here, diatom assemblages from the Bering Sea are used to investigate sea-ice evolution on millennial timescales. We find that sea-ice was primarily controlled by ice-sheet/sea level fluctuations that modulated warm water flow into the Bering Sea. Facilitated by an amplified Walker circulation, sea-ice expansion began at ∼1.05 Ma with a step-increase during the 900 kyr event. Maximal pack ice was simultaneous with glacial maxima, suggesting sea-ice was responding to, rather than modulating ice-sheet dynamics, as proposed by the sea-ice switch hypothesis. Significant pack ice, coupled with Bering Strait closure at 0.9 Ma, indicates that brine rejection played an integral role in the glacial expansion/deglacial collapse of intermediate waters during the MPT, regulating subarctic ocean-atmospheric exchanges of CO2. | en_GB |
dc.description.sponsorship | Natural Environment Research Council (NERC) | en_GB |
dc.description.sponsorship | British Geological Survey | en_GB |
dc.identifier.citation | Vol. 259, article 106918 | en_GB |
dc.identifier.doi | 10.1016/j.quascirev.2021.106918 | |
dc.identifier.grantnumber | ENV15362 | en_GB |
dc.identifier.grantnumber | GA/15S/003 | en_GB |
dc.identifier.uri | http://hdl.handle.net/10871/125371 | |
dc.language.iso | en | en_GB |
dc.publisher | Elsevier | en_GB |
dc.rights | © 2021 Published by Elsevier Ltd. Open access under a Creative Commons license: https://creativecommons.org/licenses/by/4.0/ | en_GB |
dc.subject | Sea-ice | en_GB |
dc.subject | Bering Sea | en_GB |
dc.subject | Mid-Pleistocene Transition | en_GB |
dc.subject | Diatoms | en_GB |
dc.subject | IODP Site U1343 | en_GB |
dc.title | Sea-ice response to climate change in the Bering Sea during the Mid-Pleistocene Transition | en_GB |
dc.type | Article | en_GB |
dc.date.available | 2021-04-15T13:45:08Z | |
dc.identifier.issn | 0277-3791 | |
exeter.article-number | 106918 | en_GB |
dc.description | This is the final version. Available on open access from Elsevier via the DOI in this record | en_GB |
dc.description | Data availability: All data presented in this paper is available in the Supplementary Materials. | en_GB |
dc.identifier.journal | Quaternary Science Reviews | en_GB |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | en_GB |
dcterms.dateAccepted | 2021-03-25 | |
rioxxterms.version | VoR | en_GB |
rioxxterms.licenseref.startdate | 2021-04-07 | |
rioxxterms.type | Journal Article/Review | en_GB |
refterms.dateFCD | 2021-04-15T13:40:01Z | |
refterms.versionFCD | VoR | |
refterms.dateFOA | 2021-04-15T13:45:18Z | |
refterms.panel | B | en_GB |
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