Show simple item record

dc.contributor.authorKnies, J
dc.contributor.authorPathirana, I
dc.contributor.authorCabedo-Sanz, P
dc.contributor.authorBanica, A
dc.contributor.authorFabian, K
dc.contributor.authorRasmussen, TL
dc.contributor.authorForwick, M
dc.contributor.authorBelt, Simon
dc.date.accessioned2017-01-13T13:20:02Z
dc.date.available2017-01-13T13:20:02Z
dc.date.issued2017-12
dc.identifier.issn2364-9453
dc.identifier.issn2364-9461
dc.identifier.other1
dc.identifier.urihttp://hdl.handle.net/10026.1/8244
dc.description.abstract

The production of high-salinity brines during sea-ice freezing in circum-arctic coastal polynyas is thought to be part of northern deep water formation as it supplies additional dense waters to the Atlantic meridional overturning circulation system. To better predict the effect of possible future summer ice-free conditions in the Arctic Ocean on global climate, it is important to improve our understanding of how climate change has affected sea-ice and brine formation, and thus finally dense water formation during the past. Here, we show temporal coherence between sea-ice conditions in a key Arctic polynya (Storfjorden, Svalbard) and patterns of deep water convection in the neighbouring Nordic Seas over the last 6500 years. A period of frequent sea-ice melting and freezing between 6.5 and 2.8 ka BP coincided with enhanced deep water renewal in the Nordic Seas. Near-permanent sea-ice cover and low brine rejection after 2.8 ka BP likely reduced the overflow of high-salinity shelf waters, concomitant with a gradual slow down of deep water convection in the Nordic Seas, which occurred along with a regional expansion in sea-ice and surface water freshening. The Storfjorden polynya sea-ice factory restarted at ~0.5 ka BP, coincident with renewed deep water penetration to the Arctic and climate amelioration over Svalbard. The identified synergy between Arctic polynya sea-ice conditions and deep water convection during the present interglacial is an indication of the potential consequences for ocean ventilation during states with permanent sea-ice cover or future Arctic ice-free conditions.

dc.format.extent1-
dc.languageen
dc.language.isoen
dc.publisherSpringer Science and Business Media LLC
dc.subject13 Climate Action
dc.titleSea-ice dynamics in an Arctic coastal polynya during the past 6500 years
dc.typejournal-article
plymouth.issue1
plymouth.volume3
plymouth.publication-statusPublished online
plymouth.journalarktos
dc.identifier.doi10.1007/s41063-016-0027-y
plymouth.organisational-group/Plymouth
plymouth.organisational-group/Plymouth/Faculty of Science and Engineering
plymouth.organisational-group/Plymouth/Faculty of Science and Engineering/School of Geography, Earth and Environmental Sciences
plymouth.organisational-group/Plymouth/REF 2021 Researchers by UoA
plymouth.organisational-group/Plymouth/REF 2021 Researchers by UoA/UoA07 Earth Systems and Environmental Sciences
plymouth.organisational-group/Plymouth/Research Groups
plymouth.organisational-group/Plymouth/Research Groups/Marine Institute
plymouth.organisational-group/Plymouth/Users by role
plymouth.organisational-group/Plymouth/Users by role/Academics
plymouth.organisational-group/Plymouth/Users by role/Researchers in ResearchFish submission
dcterms.dateAccepted2016-12-02
dc.rights.embargodate2017-12-23
dc.identifier.eissn2364-9461
dc.rights.embargoperiodNot known
rioxxterms.versionofrecord10.1007/s41063-016-0027-y
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.licenseref.startdate2017-12
rioxxterms.typeJournal Article/Review


Files in this item

Thumbnail
Thumbnail

This item appears in the following Collection(s)

Show simple item record


All items in PEARL are protected by copyright law.
Author manuscripts deposited to comply with open access mandates are made available in accordance with publisher policies. Please cite only the published version using the details provided on the item record or document. In the absence of an open licence (e.g. Creative Commons), permissions for further reuse of content should be sought from the publisher or author.
Theme by 
Atmire NV