Carbonyl sulfide measurements from a South Pole ice core and implications for atmospheric variability since the last glacial period
Carbonyl sulfide (COS) is the most abundant sulfur gas in the atmosphere with links to terrestrial and oceanic productivity. We measured COS in ice core air from an intermediate-depth ice core from the South Pole using both dry and wet extraction methods, recovering a 52 500-year record. We find evi...
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ftcopernicus:oai:publications.copernicus.org:cp116439 2024-09-15T18:11:53+00:00 Carbonyl sulfide measurements from a South Pole ice core and implications for atmospheric variability since the last glacial period Aydin, Murat Nicewonger, Melinda R. Britten, Gregory L. Winski, Dominic Whelan, Mary Patterson, John D. Osterberg, Erich Lee, Christopher F. Harder, Tara Callahan, Kyle J. Ferris, David Saltzman, Eric S. 2024-08-30 application/pdf https://doi.org/10.5194/cp-20-1885-2024 https://cp.copernicus.org/articles/20/1885/2024/ eng eng doi:10.5194/cp-20-1885-2024 https://cp.copernicus.org/articles/20/1885/2024/ eISSN: 1814-9332 Text 2024 ftcopernicus https://doi.org/10.5194/cp-20-1885-2024 2024-09-03T23:42:44Z Carbonyl sulfide (COS) is the most abundant sulfur gas in the atmosphere with links to terrestrial and oceanic productivity. We measured COS in ice core air from an intermediate-depth ice core from the South Pole using both dry and wet extraction methods, recovering a 52 500-year record. We find evidence for COS production in the firn, altering the atmospheric signal preserved in the ice core. Mean sea salt aerosol concentrations from the same depth are a good proxy for the COS production, which disproportionately impacts the measurements from glacial period ice with high sea salt aerosol concentrations. The COS measurements are corrected using sea salt sodium (ssNa) as a proxy for the excess COS resulting from the production. The ssNa-corrected COS record displays substantially less COS in the glacial period atmosphere than the Holocene and a 2 to 4-fold COS rise during the deglaciation synchronous with the associated climate signal. The deglacial COS rise was primarily source driven. Oceanic emissions in the form of COS, carbon disulfide ( CS 2 ), and dimethylsulfide (DMS) are collectively the largest natural source of atmospheric COS. A large increase in ocean COS emissions during the deglaciation suggests enhancements in emissions of ocean sulfur gases via processes that involve ocean productivity, although we cannot quantify individual contributions from each gas. Text ice core South pole Copernicus Publications: E-Journals Climate of the Past 20 8 1885 1917 |
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Copernicus Publications: E-Journals |
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English |
description |
Carbonyl sulfide (COS) is the most abundant sulfur gas in the atmosphere with links to terrestrial and oceanic productivity. We measured COS in ice core air from an intermediate-depth ice core from the South Pole using both dry and wet extraction methods, recovering a 52 500-year record. We find evidence for COS production in the firn, altering the atmospheric signal preserved in the ice core. Mean sea salt aerosol concentrations from the same depth are a good proxy for the COS production, which disproportionately impacts the measurements from glacial period ice with high sea salt aerosol concentrations. The COS measurements are corrected using sea salt sodium (ssNa) as a proxy for the excess COS resulting from the production. The ssNa-corrected COS record displays substantially less COS in the glacial period atmosphere than the Holocene and a 2 to 4-fold COS rise during the deglaciation synchronous with the associated climate signal. The deglacial COS rise was primarily source driven. Oceanic emissions in the form of COS, carbon disulfide ( CS 2 ), and dimethylsulfide (DMS) are collectively the largest natural source of atmospheric COS. A large increase in ocean COS emissions during the deglaciation suggests enhancements in emissions of ocean sulfur gases via processes that involve ocean productivity, although we cannot quantify individual contributions from each gas. |
format |
Text |
author |
Aydin, Murat Nicewonger, Melinda R. Britten, Gregory L. Winski, Dominic Whelan, Mary Patterson, John D. Osterberg, Erich Lee, Christopher F. Harder, Tara Callahan, Kyle J. Ferris, David Saltzman, Eric S. |
spellingShingle |
Aydin, Murat Nicewonger, Melinda R. Britten, Gregory L. Winski, Dominic Whelan, Mary Patterson, John D. Osterberg, Erich Lee, Christopher F. Harder, Tara Callahan, Kyle J. Ferris, David Saltzman, Eric S. Carbonyl sulfide measurements from a South Pole ice core and implications for atmospheric variability since the last glacial period |
author_facet |
Aydin, Murat Nicewonger, Melinda R. Britten, Gregory L. Winski, Dominic Whelan, Mary Patterson, John D. Osterberg, Erich Lee, Christopher F. Harder, Tara Callahan, Kyle J. Ferris, David Saltzman, Eric S. |
author_sort |
Aydin, Murat |
title |
Carbonyl sulfide measurements from a South Pole ice core and implications for atmospheric variability since the last glacial period |
title_short |
Carbonyl sulfide measurements from a South Pole ice core and implications for atmospheric variability since the last glacial period |
title_full |
Carbonyl sulfide measurements from a South Pole ice core and implications for atmospheric variability since the last glacial period |
title_fullStr |
Carbonyl sulfide measurements from a South Pole ice core and implications for atmospheric variability since the last glacial period |
title_full_unstemmed |
Carbonyl sulfide measurements from a South Pole ice core and implications for atmospheric variability since the last glacial period |
title_sort |
carbonyl sulfide measurements from a south pole ice core and implications for atmospheric variability since the last glacial period |
publishDate |
2024 |
url |
https://doi.org/10.5194/cp-20-1885-2024 https://cp.copernicus.org/articles/20/1885/2024/ |
genre |
ice core South pole |
genre_facet |
ice core South pole |
op_source |
eISSN: 1814-9332 |
op_relation |
doi:10.5194/cp-20-1885-2024 https://cp.copernicus.org/articles/20/1885/2024/ |
op_doi |
https://doi.org/10.5194/cp-20-1885-2024 |
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Climate of the Past |
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20 |
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8 |
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1885 |
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1917 |
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1810449465922813952 |