Canadian Arctic sea ice reconstructed from bromine in the Greenland NEEM ice core
Reconstructing the past variability of Arctic sea ice provides an essential context for recent multi-year sea ice decline, although few quantitative reconstructions cover the Holocene period prior to the earliest historical records 1,200 years ago. Photochemical recycling of bromine is observed over...
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Online Access: | http://hdl.handle.net/10278/3680370 https://doi.org/10.1038/srep33925 |
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ftuniveneziairis:oai:iris.unive.it:10278/3680370 2024-04-14T08:06:24+00:00 Canadian Arctic sea ice reconstructed from bromine in the Greenland NEEM ice core Spolaor, Andrea VALLELONGA, PAUL TRAVIS TURETTA, Clara Maffezzoli, Niccolò COZZI, Giulio GABRIELI, Jacopo BARBANTE, Carlo Goto Azuma, Kumiko Saiz Lopez, Alfonso Cuevas, Carlos A. Dahl Jensen, Dorthe Spolaor, Andrea Vallelonga, PAUL TRAVIS Turetta, Clara Maffezzoli, Niccolò Cozzi, Giulio Gabrieli, Jacopo Barbante, Carlo Goto Azuma, Kumiko Saiz Lopez, Alfonso Cuevas, Carlos A. Dahl Jensen, Dorthe 2016 http://hdl.handle.net/10278/3680370 https://doi.org/10.1038/srep33925 eng eng info:eu-repo/semantics/altIdentifier/pmid/27650478 info:eu-repo/semantics/altIdentifier/wos/WOS:000383578800001 volume:6 firstpage:33925 lastpage:33933 numberofpages:9 journal:SCIENTIFIC REPORTS info:eu-repo/grantAgreement/EC/FP7/243908 http://hdl.handle.net/10278/3680370 doi:10.1038/srep33925 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84988650347 www.nature.com/srep/index.html info:eu-repo/semantics/openAccess Sea Ice geochemistry Settore CHIM/01 - Chimica Analitica Settore CHIM/12 - Chimica dell'Ambiente e dei Beni Culturali Settore GEO/08 - Geochimica e Vulcanologia info:eu-repo/semantics/article 2016 ftuniveneziairis https://doi.org/10.1038/srep33925 2024-03-21T18:12:47Z Reconstructing the past variability of Arctic sea ice provides an essential context for recent multi-year sea ice decline, although few quantitative reconstructions cover the Holocene period prior to the earliest historical records 1,200 years ago. Photochemical recycling of bromine is observed over first-year, or seasonal, sea ice in so-called "bromine explosions" and we employ a 1-D chemistry transport model to quantify processes of bromine enrichment over first-year sea ice and depositional transport over multi-year sea ice and land ice. We report bromine enrichment in the Northwest Greenland Eemian NEEM ice core since the end of the Eemian interglacial 120,000 years ago, finding the maximum extension of first-year sea ice occurred approximately 9,000 years ago during the Holocene climate optimum, when Greenland temperatures were 2 to 3 degrees C above present values. First-year sea ice extent was lowest during the glacial stadials suggesting complete coverage of the Arctic Ocean by multi-year sea ice. These findings demonstrate a clear relationship between temperature and first-year sea ice extent in the Arctic and suggest multi-year sea ice will continue to decline as polar amplification drives Arctic temperatures beyond the 2 degrees C global average warming target of the recent COP21 Paris climate agreement. Article in Journal/Newspaper Arctic Arctic Ocean Greenland ice core Sea ice Università Ca’ Foscari Venezia: ARCA (Archivio Istituzionale della Ricerca) Arctic Arctic Ocean Greenland Scientific Reports 6 1 |
institution |
Open Polar |
collection |
Università Ca’ Foscari Venezia: ARCA (Archivio Istituzionale della Ricerca) |
op_collection_id |
ftuniveneziairis |
language |
English |
topic |
Sea Ice geochemistry Settore CHIM/01 - Chimica Analitica Settore CHIM/12 - Chimica dell'Ambiente e dei Beni Culturali Settore GEO/08 - Geochimica e Vulcanologia |
spellingShingle |
Sea Ice geochemistry Settore CHIM/01 - Chimica Analitica Settore CHIM/12 - Chimica dell'Ambiente e dei Beni Culturali Settore GEO/08 - Geochimica e Vulcanologia Spolaor, Andrea VALLELONGA, PAUL TRAVIS TURETTA, Clara Maffezzoli, Niccolò COZZI, Giulio GABRIELI, Jacopo BARBANTE, Carlo Goto Azuma, Kumiko Saiz Lopez, Alfonso Cuevas, Carlos A. Dahl Jensen, Dorthe Canadian Arctic sea ice reconstructed from bromine in the Greenland NEEM ice core |
topic_facet |
Sea Ice geochemistry Settore CHIM/01 - Chimica Analitica Settore CHIM/12 - Chimica dell'Ambiente e dei Beni Culturali Settore GEO/08 - Geochimica e Vulcanologia |
description |
Reconstructing the past variability of Arctic sea ice provides an essential context for recent multi-year sea ice decline, although few quantitative reconstructions cover the Holocene period prior to the earliest historical records 1,200 years ago. Photochemical recycling of bromine is observed over first-year, or seasonal, sea ice in so-called "bromine explosions" and we employ a 1-D chemistry transport model to quantify processes of bromine enrichment over first-year sea ice and depositional transport over multi-year sea ice and land ice. We report bromine enrichment in the Northwest Greenland Eemian NEEM ice core since the end of the Eemian interglacial 120,000 years ago, finding the maximum extension of first-year sea ice occurred approximately 9,000 years ago during the Holocene climate optimum, when Greenland temperatures were 2 to 3 degrees C above present values. First-year sea ice extent was lowest during the glacial stadials suggesting complete coverage of the Arctic Ocean by multi-year sea ice. These findings demonstrate a clear relationship between temperature and first-year sea ice extent in the Arctic and suggest multi-year sea ice will continue to decline as polar amplification drives Arctic temperatures beyond the 2 degrees C global average warming target of the recent COP21 Paris climate agreement. |
author2 |
Spolaor, Andrea Vallelonga, PAUL TRAVIS Turetta, Clara Maffezzoli, Niccolò Cozzi, Giulio Gabrieli, Jacopo Barbante, Carlo Goto Azuma, Kumiko Saiz Lopez, Alfonso Cuevas, Carlos A. Dahl Jensen, Dorthe |
format |
Article in Journal/Newspaper |
author |
Spolaor, Andrea VALLELONGA, PAUL TRAVIS TURETTA, Clara Maffezzoli, Niccolò COZZI, Giulio GABRIELI, Jacopo BARBANTE, Carlo Goto Azuma, Kumiko Saiz Lopez, Alfonso Cuevas, Carlos A. Dahl Jensen, Dorthe |
author_facet |
Spolaor, Andrea VALLELONGA, PAUL TRAVIS TURETTA, Clara Maffezzoli, Niccolò COZZI, Giulio GABRIELI, Jacopo BARBANTE, Carlo Goto Azuma, Kumiko Saiz Lopez, Alfonso Cuevas, Carlos A. Dahl Jensen, Dorthe |
author_sort |
Spolaor, Andrea |
title |
Canadian Arctic sea ice reconstructed from bromine in the Greenland NEEM ice core |
title_short |
Canadian Arctic sea ice reconstructed from bromine in the Greenland NEEM ice core |
title_full |
Canadian Arctic sea ice reconstructed from bromine in the Greenland NEEM ice core |
title_fullStr |
Canadian Arctic sea ice reconstructed from bromine in the Greenland NEEM ice core |
title_full_unstemmed |
Canadian Arctic sea ice reconstructed from bromine in the Greenland NEEM ice core |
title_sort |
canadian arctic sea ice reconstructed from bromine in the greenland neem ice core |
publishDate |
2016 |
url |
http://hdl.handle.net/10278/3680370 https://doi.org/10.1038/srep33925 |
geographic |
Arctic Arctic Ocean Greenland |
geographic_facet |
Arctic Arctic Ocean Greenland |
genre |
Arctic Arctic Ocean Greenland ice core Sea ice |
genre_facet |
Arctic Arctic Ocean Greenland ice core Sea ice |
op_relation |
info:eu-repo/semantics/altIdentifier/pmid/27650478 info:eu-repo/semantics/altIdentifier/wos/WOS:000383578800001 volume:6 firstpage:33925 lastpage:33933 numberofpages:9 journal:SCIENTIFIC REPORTS info:eu-repo/grantAgreement/EC/FP7/243908 http://hdl.handle.net/10278/3680370 doi:10.1038/srep33925 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84988650347 www.nature.com/srep/index.html |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1038/srep33925 |
container_title |
Scientific Reports |
container_volume |
6 |
container_issue |
1 |
_version_ |
1796303248887382016 |