Sea-ice variations and trends during the Common Era in the Atlantic sector of the Arctic Ocean
Sea ice is crucial in regulating the heat balance between the ocean and atmosphere and quintessential for supporting the prevailing Arctic food web. Due to limited and often local data availability back in time, the sensitivity of sea-ice proxies to long-term climate changes is not well constrained,...
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ftdoajarticles:oai:doaj.org/article:06b7d77ded0d44608374d587b1d04f25 2024-09-09T19:21:47+00:00 Sea-ice variations and trends during the Common Era in the Atlantic sector of the Arctic Ocean A. L. L. Dauner F. Schenk K. E. Power M. Heikkilä 2024-03-01T00:00:00Z https://doi.org/10.5194/tc-18-1399-2024 https://doaj.org/article/06b7d77ded0d44608374d587b1d04f25 EN eng Copernicus Publications https://tc.copernicus.org/articles/18/1399/2024/tc-18-1399-2024.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-18-1399-2024 1994-0416 1994-0424 https://doaj.org/article/06b7d77ded0d44608374d587b1d04f25 The Cryosphere, Vol 18, Pp 1399-1418 (2024) Environmental sciences GE1-350 Geology QE1-996.5 article 2024 ftdoajarticles https://doi.org/10.5194/tc-18-1399-2024 2024-08-05T17:49:45Z Sea ice is crucial in regulating the heat balance between the ocean and atmosphere and quintessential for supporting the prevailing Arctic food web. Due to limited and often local data availability back in time, the sensitivity of sea-ice proxies to long-term climate changes is not well constrained, which renders any comparison with palaeoclimate model simulations difficult. Here we compiled a set of marine sea-ice proxy records with a relatively high temporal resolution of at least 100 years, covering the Common Era (past 2k years) in the Greenland–North Atlantic sector of the Arctic to explore the presence of coherent long-term trends and common low-frequency variability, and we compared those data with transient climate model simulations. We used cluster analysis and empirical orthogonal functions to extract leading modes of sea-ice variability, which efficiently filtered out local variations and improved comparison between proxy records and model simulations. We find that a compilation of multiple proxy-based sea-ice reconstructions accurately reflects general long-term changes in sea-ice history, consistent with simulations from two transient climate models. Although sea-ice proxies have varying mechanistic relationships to sea-ice cover, typically differing in habitat or seasonal representation, the long-term trend recorded by proxy-based reconstructions showed a good agreement with summer minimum sea-ice area from the model simulations. The short-term variability was not as coherent between proxy-based reconstructions and model simulations. The leading mode of simulated sea ice associated with the multidecadal to centennial timescale presented a relatively low explained variance and might be explained by changes in solar radiation and/or inflow of warm Atlantic waters to the Arctic Ocean. Short variations in proxy-based reconstructions, however, are mainly associated with local factors and the ecological nature of the proxies. Therefore, a regional or large-scale view of sea-ice trends necessitates ... Article in Journal/Newspaper Arctic Arctic Ocean Greenland North Atlantic Sea ice The Cryosphere Directory of Open Access Journals: DOAJ Articles Arctic Arctic Ocean Greenland The Cryosphere 18 3 1399 1418 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental sciences GE1-350 Geology QE1-996.5 |
spellingShingle |
Environmental sciences GE1-350 Geology QE1-996.5 A. L. L. Dauner F. Schenk K. E. Power M. Heikkilä Sea-ice variations and trends during the Common Era in the Atlantic sector of the Arctic Ocean |
topic_facet |
Environmental sciences GE1-350 Geology QE1-996.5 |
description |
Sea ice is crucial in regulating the heat balance between the ocean and atmosphere and quintessential for supporting the prevailing Arctic food web. Due to limited and often local data availability back in time, the sensitivity of sea-ice proxies to long-term climate changes is not well constrained, which renders any comparison with palaeoclimate model simulations difficult. Here we compiled a set of marine sea-ice proxy records with a relatively high temporal resolution of at least 100 years, covering the Common Era (past 2k years) in the Greenland–North Atlantic sector of the Arctic to explore the presence of coherent long-term trends and common low-frequency variability, and we compared those data with transient climate model simulations. We used cluster analysis and empirical orthogonal functions to extract leading modes of sea-ice variability, which efficiently filtered out local variations and improved comparison between proxy records and model simulations. We find that a compilation of multiple proxy-based sea-ice reconstructions accurately reflects general long-term changes in sea-ice history, consistent with simulations from two transient climate models. Although sea-ice proxies have varying mechanistic relationships to sea-ice cover, typically differing in habitat or seasonal representation, the long-term trend recorded by proxy-based reconstructions showed a good agreement with summer minimum sea-ice area from the model simulations. The short-term variability was not as coherent between proxy-based reconstructions and model simulations. The leading mode of simulated sea ice associated with the multidecadal to centennial timescale presented a relatively low explained variance and might be explained by changes in solar radiation and/or inflow of warm Atlantic waters to the Arctic Ocean. Short variations in proxy-based reconstructions, however, are mainly associated with local factors and the ecological nature of the proxies. Therefore, a regional or large-scale view of sea-ice trends necessitates ... |
format |
Article in Journal/Newspaper |
author |
A. L. L. Dauner F. Schenk K. E. Power M. Heikkilä |
author_facet |
A. L. L. Dauner F. Schenk K. E. Power M. Heikkilä |
author_sort |
A. L. L. Dauner |
title |
Sea-ice variations and trends during the Common Era in the Atlantic sector of the Arctic Ocean |
title_short |
Sea-ice variations and trends during the Common Era in the Atlantic sector of the Arctic Ocean |
title_full |
Sea-ice variations and trends during the Common Era in the Atlantic sector of the Arctic Ocean |
title_fullStr |
Sea-ice variations and trends during the Common Era in the Atlantic sector of the Arctic Ocean |
title_full_unstemmed |
Sea-ice variations and trends during the Common Era in the Atlantic sector of the Arctic Ocean |
title_sort |
sea-ice variations and trends during the common era in the atlantic sector of the arctic ocean |
publisher |
Copernicus Publications |
publishDate |
2024 |
url |
https://doi.org/10.5194/tc-18-1399-2024 https://doaj.org/article/06b7d77ded0d44608374d587b1d04f25 |
geographic |
Arctic Arctic Ocean Greenland |
geographic_facet |
Arctic Arctic Ocean Greenland |
genre |
Arctic Arctic Ocean Greenland North Atlantic Sea ice The Cryosphere |
genre_facet |
Arctic Arctic Ocean Greenland North Atlantic Sea ice The Cryosphere |
op_source |
The Cryosphere, Vol 18, Pp 1399-1418 (2024) |
op_relation |
https://tc.copernicus.org/articles/18/1399/2024/tc-18-1399-2024.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-18-1399-2024 1994-0416 1994-0424 https://doaj.org/article/06b7d77ded0d44608374d587b1d04f25 |
op_doi |
https://doi.org/10.5194/tc-18-1399-2024 |
container_title |
The Cryosphere |
container_volume |
18 |
container_issue |
3 |
container_start_page |
1399 |
op_container_end_page |
1418 |
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1809762033487314944 |