On the relationship between δO2∕N2 variability and ice sheet surface conditions in Antarctica
While the processes controlling pore closure are broadly understood, the physical mechanisms driving the associated elemental fractionation remains ambiguous. Previous studies have shown that the pore closure process leads to a depletion in small-sized molecules (e.g. H 2 , O 2 , Ar, Ne, He) in ice...
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Online Access: | https://doi.org/10.5194/tc-18-3741-2024 https://tc.copernicus.org/articles/18/3741/2024/ |
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ftcopernicus:oai:publications.copernicus.org:tc115798 2024-09-15T17:48:36+00:00 On the relationship between δO2∕N2 variability and ice sheet surface conditions in Antarctica Harris Stuart, Romilly Landais, Amaëlle Arnaud, Laurent Buizert, Christo Capron, Emilie Dumont, Marie Libois, Quentin Mulvaney, Robert Orsi, Anaïs Picard, Ghislain Prié, Frédéric Severinghaus, Jeffrey Stenni, Barbara Martinerie, Patricia 2024-08-22 application/pdf https://doi.org/10.5194/tc-18-3741-2024 https://tc.copernicus.org/articles/18/3741/2024/ eng eng doi:10.5194/tc-18-3741-2024 https://tc.copernicus.org/articles/18/3741/2024/ eISSN: 1994-0424 Text 2024 ftcopernicus https://doi.org/10.5194/tc-18-3741-2024 2024-08-28T05:24:22Z While the processes controlling pore closure are broadly understood, the physical mechanisms driving the associated elemental fractionation remains ambiguous. Previous studies have shown that the pore closure process leads to a depletion in small-sized molecules (e.g. H 2 , O 2 , Ar, Ne, He) in ice core bubbles relative to larger-sized molecules like N 2 . This size-dependent fractionation, identified using ice core δ ( O 2 / N 2 ) <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="49pt" height="14pt" class="svg-formula" dspmath="mathimg" md5hash="e4d76ebc952016283d37007278f6b1ba"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="tc-18-3741-2024-ie00004.svg" width="49pt" height="14pt" src="tc-18-3741-2024-ie00004.png"/> </svg:svg> records, exhibits a clear anti-correlation with local summer solstice insolation, making δ ( O 2 / N 2 ) <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="49pt" height="14pt" class="svg-formula" dspmath="mathimg" md5hash="23dc7679cf0e1a0a665444524913a3e3"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="tc-18-3741-2024-ie00005.svg" width="49pt" height="14pt" src="tc-18-3741-2024-ie00005.png"/> </svg:svg> a valuable ice core dating tool. Mechanisms controlling this relationship are attributed to the physical properties of deep firn. In this study, we compile δ ( O 2 / N 2 ) <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="49pt" height="14pt" class="svg-formula" dspmath="mathimg" md5hash="96157c289844eb9f7df001c7882352a7"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="tc-18-3741-2024-ie00006.svg" width="49pt" height="14pt" src="tc-18-3741-2024-ie00006.png"/> </svg:svg> records from 15 polar ice cores and show a new additional link between δ ( O 2 / N 2 ) <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="49pt" height="14pt" class="svg-formula" dspmath="mathimg" md5hash="28609d3e6f976a7c5045bed2b5599ee5"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" ... Text Antarc* Antarctica ice core Ice Sheet Copernicus Publications: E-Journals The Cryosphere 18 8 3741 3763 |
institution |
Open Polar |
collection |
Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
description |
While the processes controlling pore closure are broadly understood, the physical mechanisms driving the associated elemental fractionation remains ambiguous. Previous studies have shown that the pore closure process leads to a depletion in small-sized molecules (e.g. H 2 , O 2 , Ar, Ne, He) in ice core bubbles relative to larger-sized molecules like N 2 . This size-dependent fractionation, identified using ice core δ ( O 2 / N 2 ) <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="49pt" height="14pt" class="svg-formula" dspmath="mathimg" md5hash="e4d76ebc952016283d37007278f6b1ba"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="tc-18-3741-2024-ie00004.svg" width="49pt" height="14pt" src="tc-18-3741-2024-ie00004.png"/> </svg:svg> records, exhibits a clear anti-correlation with local summer solstice insolation, making δ ( O 2 / N 2 ) <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="49pt" height="14pt" class="svg-formula" dspmath="mathimg" md5hash="23dc7679cf0e1a0a665444524913a3e3"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="tc-18-3741-2024-ie00005.svg" width="49pt" height="14pt" src="tc-18-3741-2024-ie00005.png"/> </svg:svg> a valuable ice core dating tool. Mechanisms controlling this relationship are attributed to the physical properties of deep firn. In this study, we compile δ ( O 2 / N 2 ) <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="49pt" height="14pt" class="svg-formula" dspmath="mathimg" md5hash="96157c289844eb9f7df001c7882352a7"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="tc-18-3741-2024-ie00006.svg" width="49pt" height="14pt" src="tc-18-3741-2024-ie00006.png"/> </svg:svg> records from 15 polar ice cores and show a new additional link between δ ( O 2 / N 2 ) <svg:svg xmlns:svg="http://www.w3.org/2000/svg" width="49pt" height="14pt" class="svg-formula" dspmath="mathimg" md5hash="28609d3e6f976a7c5045bed2b5599ee5"><svg:image xmlns:xlink="http://www.w3.org/1999/xlink" ... |
format |
Text |
author |
Harris Stuart, Romilly Landais, Amaëlle Arnaud, Laurent Buizert, Christo Capron, Emilie Dumont, Marie Libois, Quentin Mulvaney, Robert Orsi, Anaïs Picard, Ghislain Prié, Frédéric Severinghaus, Jeffrey Stenni, Barbara Martinerie, Patricia |
spellingShingle |
Harris Stuart, Romilly Landais, Amaëlle Arnaud, Laurent Buizert, Christo Capron, Emilie Dumont, Marie Libois, Quentin Mulvaney, Robert Orsi, Anaïs Picard, Ghislain Prié, Frédéric Severinghaus, Jeffrey Stenni, Barbara Martinerie, Patricia On the relationship between δO2∕N2 variability and ice sheet surface conditions in Antarctica |
author_facet |
Harris Stuart, Romilly Landais, Amaëlle Arnaud, Laurent Buizert, Christo Capron, Emilie Dumont, Marie Libois, Quentin Mulvaney, Robert Orsi, Anaïs Picard, Ghislain Prié, Frédéric Severinghaus, Jeffrey Stenni, Barbara Martinerie, Patricia |
author_sort |
Harris Stuart, Romilly |
title |
On the relationship between δO2∕N2 variability and ice sheet surface conditions in Antarctica |
title_short |
On the relationship between δO2∕N2 variability and ice sheet surface conditions in Antarctica |
title_full |
On the relationship between δO2∕N2 variability and ice sheet surface conditions in Antarctica |
title_fullStr |
On the relationship between δO2∕N2 variability and ice sheet surface conditions in Antarctica |
title_full_unstemmed |
On the relationship between δO2∕N2 variability and ice sheet surface conditions in Antarctica |
title_sort |
on the relationship between δo2∕n2 variability and ice sheet surface conditions in antarctica |
publishDate |
2024 |
url |
https://doi.org/10.5194/tc-18-3741-2024 https://tc.copernicus.org/articles/18/3741/2024/ |
genre |
Antarc* Antarctica ice core Ice Sheet |
genre_facet |
Antarc* Antarctica ice core Ice Sheet |
op_source |
eISSN: 1994-0424 |
op_relation |
doi:10.5194/tc-18-3741-2024 https://tc.copernicus.org/articles/18/3741/2024/ |
op_doi |
https://doi.org/10.5194/tc-18-3741-2024 |
container_title |
The Cryosphere |
container_volume |
18 |
container_issue |
8 |
container_start_page |
3741 |
op_container_end_page |
3763 |
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1810290034848301056 |