Inclusions in ice layers formed by melting and refreezing processes in a Greenland ice core
In recent decades, surface melting on the inland Greenland ice sheet has increased, leading to significant meltwater-refreezing in the snow and firn. Increased knowledge of the physical and chemical characteristics of these melt features (i.e., ice layers) is needed to help estimate future global se...
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Cambridge University Press
2023
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ftdoajarticles:oai:doaj.org/article:569635bc169641e1840399375fa6569c 2023-08-20T04:06:49+02:00 Inclusions in ice layers formed by melting and refreezing processes in a Greenland ice core Kaoru Kawakami Yoshinori Iizuka Sumito Matoba Teruo Aoki Takuto Ando 2023-08-01T00:00:00Z https://doi.org/10.1017/jog.2022.101 https://doaj.org/article/569635bc169641e1840399375fa6569c EN eng Cambridge University Press https://www.cambridge.org/core/product/identifier/S0022143022001010/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2022.101 0022-1430 1727-5652 https://doaj.org/article/569635bc169641e1840399375fa6569c Journal of Glaciology, Vol 69, Pp 790-802 (2023) Ice and climate ice chemistry ice core Environmental sciences GE1-350 Meteorology. Climatology QC851-999 article 2023 ftdoajarticles https://doi.org/10.1017/jog.2022.101 2023-07-30T00:36:44Z In recent decades, surface melting on the inland Greenland ice sheet has increased, leading to significant meltwater-refreezing in the snow and firn. Increased knowledge of the physical and chemical characteristics of these melt features (i.e., ice layers) is needed to help estimate future global sea-level rise. Here, using a combination of microscopy and spectroscopy, we investigate the size, shape, location, and chemical compositions of inclusions in 12 ice layers of the SIGMA-A ice core in the northwestern Greenland ice sheet (78°03′06″N, 67°37′42″W, 1490 m a.s.l.). In the ice layers, we found inclusions exceeding 30 μm diameter that could only be formed by melting–refreezing, which we classify into columnar-, particle-, and rod-like inclusions. We propose that the smaller columnar- and particle-like inclusions of solid Na2SO4⋅10H2O and CaSO4⋅2H2O form first, within the ice grains, followed by the larger rod-like inclusions of brines with mainly Na+ and Cl− in grain boundaries. Our results suggest a new proxy that may help identify past warm climates in deeper ice cores in Greenland and for studying future ice sheet melting behavior. Article in Journal/Newspaper Greenland Greenland ice core ice core Ice Sheet Journal of Glaciology Directory of Open Access Journals: DOAJ Articles Greenland Journal of Glaciology 1 13 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Ice and climate ice chemistry ice core Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
spellingShingle |
Ice and climate ice chemistry ice core Environmental sciences GE1-350 Meteorology. Climatology QC851-999 Kaoru Kawakami Yoshinori Iizuka Sumito Matoba Teruo Aoki Takuto Ando Inclusions in ice layers formed by melting and refreezing processes in a Greenland ice core |
topic_facet |
Ice and climate ice chemistry ice core Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
description |
In recent decades, surface melting on the inland Greenland ice sheet has increased, leading to significant meltwater-refreezing in the snow and firn. Increased knowledge of the physical and chemical characteristics of these melt features (i.e., ice layers) is needed to help estimate future global sea-level rise. Here, using a combination of microscopy and spectroscopy, we investigate the size, shape, location, and chemical compositions of inclusions in 12 ice layers of the SIGMA-A ice core in the northwestern Greenland ice sheet (78°03′06″N, 67°37′42″W, 1490 m a.s.l.). In the ice layers, we found inclusions exceeding 30 μm diameter that could only be formed by melting–refreezing, which we classify into columnar-, particle-, and rod-like inclusions. We propose that the smaller columnar- and particle-like inclusions of solid Na2SO4⋅10H2O and CaSO4⋅2H2O form first, within the ice grains, followed by the larger rod-like inclusions of brines with mainly Na+ and Cl− in grain boundaries. Our results suggest a new proxy that may help identify past warm climates in deeper ice cores in Greenland and for studying future ice sheet melting behavior. |
format |
Article in Journal/Newspaper |
author |
Kaoru Kawakami Yoshinori Iizuka Sumito Matoba Teruo Aoki Takuto Ando |
author_facet |
Kaoru Kawakami Yoshinori Iizuka Sumito Matoba Teruo Aoki Takuto Ando |
author_sort |
Kaoru Kawakami |
title |
Inclusions in ice layers formed by melting and refreezing processes in a Greenland ice core |
title_short |
Inclusions in ice layers formed by melting and refreezing processes in a Greenland ice core |
title_full |
Inclusions in ice layers formed by melting and refreezing processes in a Greenland ice core |
title_fullStr |
Inclusions in ice layers formed by melting and refreezing processes in a Greenland ice core |
title_full_unstemmed |
Inclusions in ice layers formed by melting and refreezing processes in a Greenland ice core |
title_sort |
inclusions in ice layers formed by melting and refreezing processes in a greenland ice core |
publisher |
Cambridge University Press |
publishDate |
2023 |
url |
https://doi.org/10.1017/jog.2022.101 https://doaj.org/article/569635bc169641e1840399375fa6569c |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Greenland ice core ice core Ice Sheet Journal of Glaciology |
genre_facet |
Greenland Greenland ice core ice core Ice Sheet Journal of Glaciology |
op_source |
Journal of Glaciology, Vol 69, Pp 790-802 (2023) |
op_relation |
https://www.cambridge.org/core/product/identifier/S0022143022001010/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2022.101 0022-1430 1727-5652 https://doaj.org/article/569635bc169641e1840399375fa6569c |
op_doi |
https://doi.org/10.1017/jog.2022.101 |
container_title |
Journal of Glaciology |
container_start_page |
1 |
op_container_end_page |
13 |
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1774718156466552832 |