Contribution of Snow to Arctic First‐Year and Multi‐Year Sea Ice Mass Balance Within the Last Ice Area
We present the δ18O isotope composition of 16 multi-year ice (MYI) and eight first-year ice (FYI) cores collected during spring from the Lincoln Sea, a region within the Last Ice Area, which is expected to retain MYI longest into the future. Isotopic signatures were used to quantify the contribution...
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ftawi:oai:epic.awi.de:55575 2024-09-15T17:51:34+00:00 Contribution of Snow to Arctic First‐Year and Multi‐Year Sea Ice Mass Balance Within the Last Ice Area Lange, Benjamin A. Haas, Christian Mucci, Alfonso Beckers, Justin F. Casey, J. Alec Duerksen, Steve Granskog, Mats A. Hatam, Ido Niemi, Andrea Reppchen, Anke Michel, Christine 2021 https://epic.awi.de/id/eprint/55575/ https://doi.org/10.1029/2020JC016971 https://hdl.handle.net/10013/epic.2e4c8471-0089-47fc-bc6f-16cce2970f0b unknown Lange, B. A. , Haas, C. orcid:0000-0002-7674-3500 , Mucci, A. , Beckers, J. F. , Casey, J. A. , Duerksen, S. , Granskog, M. A. , Hatam, I. , Niemi, A. , Reppchen, A. and Michel, C. (2021) Contribution of Snow to Arctic First‐Year and Multi‐Year Sea Ice Mass Balance Within the Last Ice Area , Journal of Geophysical Research: Oceans, 126 (5) . doi:10.1029/2020JC016971 <https://doi.org/10.1029/2020JC016971> , hdl:10013/epic.2e4c8471-0089-47fc-bc6f-16cce2970f0b EPIC3Journal of Geophysical Research: Oceans, 126(5), ISSN: 2169-9275 Article isiRev 2021 ftawi https://doi.org/10.1029/2020JC016971 2024-06-24T04:27:29Z We present the δ18O isotope composition of 16 multi-year ice (MYI) and eight first-year ice (FYI) cores collected during spring from the Lincoln Sea, a region within the Last Ice Area, which is expected to retain MYI longest into the future. Isotopic signatures were used to quantify the contribution of snow to sea ice mass. These estimates yield a higher total snow contribution in MYI (10 ± 5%) than to FYI (4 ± 2%). Converted to Snow Depth Equivalent (SDE), MYI had five times larger SDE (0.79 ± 0.38 m) than FYI (0.16 ± 0.11 m). The difference is explained by the contribution of refrozen surface and under-ice melt ponds as well as superimposed/interposed ice for MYI resulting from higher accumulation of snow over multiple, longer accumulation seasons compared to FYI. Given the impending replacement of MYI by FYI, the large difference in absolute snow contributions between MYI and FYI highlights the potential implications in terms of the redistribution of precipitation-derived (meteoric) freshwater throughout the Arctic Ocean. Furthermore, we observed high relative snow contributions to ice mass in the surface of one-third of older FYI cores, which we attributed to flooding and formation of snow-ice. Our results support the premise that flooding events on FYI may be more prevalent throughout the Arctic Ocean than previously assumed. Article in Journal/Newspaper Arctic Arctic Ocean Lincoln Sea Sea ice Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Journal of Geophysical Research: Oceans 126 5 |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
language |
unknown |
description |
We present the δ18O isotope composition of 16 multi-year ice (MYI) and eight first-year ice (FYI) cores collected during spring from the Lincoln Sea, a region within the Last Ice Area, which is expected to retain MYI longest into the future. Isotopic signatures were used to quantify the contribution of snow to sea ice mass. These estimates yield a higher total snow contribution in MYI (10 ± 5%) than to FYI (4 ± 2%). Converted to Snow Depth Equivalent (SDE), MYI had five times larger SDE (0.79 ± 0.38 m) than FYI (0.16 ± 0.11 m). The difference is explained by the contribution of refrozen surface and under-ice melt ponds as well as superimposed/interposed ice for MYI resulting from higher accumulation of snow over multiple, longer accumulation seasons compared to FYI. Given the impending replacement of MYI by FYI, the large difference in absolute snow contributions between MYI and FYI highlights the potential implications in terms of the redistribution of precipitation-derived (meteoric) freshwater throughout the Arctic Ocean. Furthermore, we observed high relative snow contributions to ice mass in the surface of one-third of older FYI cores, which we attributed to flooding and formation of snow-ice. Our results support the premise that flooding events on FYI may be more prevalent throughout the Arctic Ocean than previously assumed. |
format |
Article in Journal/Newspaper |
author |
Lange, Benjamin A. Haas, Christian Mucci, Alfonso Beckers, Justin F. Casey, J. Alec Duerksen, Steve Granskog, Mats A. Hatam, Ido Niemi, Andrea Reppchen, Anke Michel, Christine |
spellingShingle |
Lange, Benjamin A. Haas, Christian Mucci, Alfonso Beckers, Justin F. Casey, J. Alec Duerksen, Steve Granskog, Mats A. Hatam, Ido Niemi, Andrea Reppchen, Anke Michel, Christine Contribution of Snow to Arctic First‐Year and Multi‐Year Sea Ice Mass Balance Within the Last Ice Area |
author_facet |
Lange, Benjamin A. Haas, Christian Mucci, Alfonso Beckers, Justin F. Casey, J. Alec Duerksen, Steve Granskog, Mats A. Hatam, Ido Niemi, Andrea Reppchen, Anke Michel, Christine |
author_sort |
Lange, Benjamin A. |
title |
Contribution of Snow to Arctic First‐Year and Multi‐Year Sea Ice Mass Balance Within the Last Ice Area |
title_short |
Contribution of Snow to Arctic First‐Year and Multi‐Year Sea Ice Mass Balance Within the Last Ice Area |
title_full |
Contribution of Snow to Arctic First‐Year and Multi‐Year Sea Ice Mass Balance Within the Last Ice Area |
title_fullStr |
Contribution of Snow to Arctic First‐Year and Multi‐Year Sea Ice Mass Balance Within the Last Ice Area |
title_full_unstemmed |
Contribution of Snow to Arctic First‐Year and Multi‐Year Sea Ice Mass Balance Within the Last Ice Area |
title_sort |
contribution of snow to arctic first‐year and multi‐year sea ice mass balance within the last ice area |
publishDate |
2021 |
url |
https://epic.awi.de/id/eprint/55575/ https://doi.org/10.1029/2020JC016971 https://hdl.handle.net/10013/epic.2e4c8471-0089-47fc-bc6f-16cce2970f0b |
genre |
Arctic Arctic Ocean Lincoln Sea Sea ice |
genre_facet |
Arctic Arctic Ocean Lincoln Sea Sea ice |
op_source |
EPIC3Journal of Geophysical Research: Oceans, 126(5), ISSN: 2169-9275 |
op_relation |
Lange, B. A. , Haas, C. orcid:0000-0002-7674-3500 , Mucci, A. , Beckers, J. F. , Casey, J. A. , Duerksen, S. , Granskog, M. A. , Hatam, I. , Niemi, A. , Reppchen, A. and Michel, C. (2021) Contribution of Snow to Arctic First‐Year and Multi‐Year Sea Ice Mass Balance Within the Last Ice Area , Journal of Geophysical Research: Oceans, 126 (5) . doi:10.1029/2020JC016971 <https://doi.org/10.1029/2020JC016971> , hdl:10013/epic.2e4c8471-0089-47fc-bc6f-16cce2970f0b |
op_doi |
https://doi.org/10.1029/2020JC016971 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
126 |
container_issue |
5 |
_version_ |
1810293491403587584 |