Carbonyl sulfide in air extracted from a South Pole ice core: a 2000 year record
In this study, we present carbonyl sulfide (COS) measurements from an ice core drilled near South Pole, East Antarctica (SPRESSO). The samples are from 135–291 m, with estimated mean COS ages ranging from 278 to 2155 years before present (defined as 2000 C.E.). When combined with the previous record...
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ftcopernicus:oai:publications.copernicus.org:acp5417 2023-05-15T13:45:55+02:00 Carbonyl sulfide in air extracted from a South Pole ice core: a 2000 year record Aydin, M. Williams, M. B. Tatum, C. Saltzman, E. S. 2018-01-15 application/pdf https://doi.org/10.5194/acp-8-7533-2008 https://www.atmos-chem-phys.net/8/7533/2008/ eng eng doi:10.5194/acp-8-7533-2008 https://www.atmos-chem-phys.net/8/7533/2008/ eISSN: 1680-7324 Text 2018 ftcopernicus https://doi.org/10.5194/acp-8-7533-2008 2019-12-24T09:58:03Z In this study, we present carbonyl sulfide (COS) measurements from an ice core drilled near South Pole, East Antarctica (SPRESSO). The samples are from 135–291 m, with estimated mean COS ages ranging from 278 to 2155 years before present (defined as 2000 C.E.). When combined with the previous records of COS from Antarctic ice cores and firn air, the current data provide a continuous record of COS extending beyond the last two millennia. The general agreement between ice cores, firn air, and modern air measurements supports the idea that polar ice is a valid archive for paleoatmospheric COS. The average COS mixing ratio of the SPRESSO data set is (331±18) ppt (parts per trillion in mol/mol, ±1σ, n =100), excluding 6 outliers. These data confirm earlier firn air and ice core measurements indicating that the late 20th century COS levels of 500 ppt are greatly increased over preindustrial levels and represent the highest atmospheric levels over the past 2000 years. The data also provide evidence of climate-related variability on centennial time-scales, with relative maxima at the peaks of Medieval Climate Anomaly and Little Ice Age. There is evidence for a long-term increasing trend in COS of 1.8 ppt per 100 years. Further ice core studies will be needed to determine whether this trend reflects secular variability in atmospheric COS, or a slow post-depositional chemical loss of COS in the ice core. Text Antarc* Antarctic Antarctica East Antarctica ice core South pole South pole Copernicus Publications: E-Journals Antarctic East Antarctica South Pole Atmospheric Chemistry and Physics 8 24 7533 7542 |
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Open Polar |
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Copernicus Publications: E-Journals |
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ftcopernicus |
language |
English |
description |
In this study, we present carbonyl sulfide (COS) measurements from an ice core drilled near South Pole, East Antarctica (SPRESSO). The samples are from 135–291 m, with estimated mean COS ages ranging from 278 to 2155 years before present (defined as 2000 C.E.). When combined with the previous records of COS from Antarctic ice cores and firn air, the current data provide a continuous record of COS extending beyond the last two millennia. The general agreement between ice cores, firn air, and modern air measurements supports the idea that polar ice is a valid archive for paleoatmospheric COS. The average COS mixing ratio of the SPRESSO data set is (331±18) ppt (parts per trillion in mol/mol, ±1σ, n =100), excluding 6 outliers. These data confirm earlier firn air and ice core measurements indicating that the late 20th century COS levels of 500 ppt are greatly increased over preindustrial levels and represent the highest atmospheric levels over the past 2000 years. The data also provide evidence of climate-related variability on centennial time-scales, with relative maxima at the peaks of Medieval Climate Anomaly and Little Ice Age. There is evidence for a long-term increasing trend in COS of 1.8 ppt per 100 years. Further ice core studies will be needed to determine whether this trend reflects secular variability in atmospheric COS, or a slow post-depositional chemical loss of COS in the ice core. |
format |
Text |
author |
Aydin, M. Williams, M. B. Tatum, C. Saltzman, E. S. |
spellingShingle |
Aydin, M. Williams, M. B. Tatum, C. Saltzman, E. S. Carbonyl sulfide in air extracted from a South Pole ice core: a 2000 year record |
author_facet |
Aydin, M. Williams, M. B. Tatum, C. Saltzman, E. S. |
author_sort |
Aydin, M. |
title |
Carbonyl sulfide in air extracted from a South Pole ice core: a 2000 year record |
title_short |
Carbonyl sulfide in air extracted from a South Pole ice core: a 2000 year record |
title_full |
Carbonyl sulfide in air extracted from a South Pole ice core: a 2000 year record |
title_fullStr |
Carbonyl sulfide in air extracted from a South Pole ice core: a 2000 year record |
title_full_unstemmed |
Carbonyl sulfide in air extracted from a South Pole ice core: a 2000 year record |
title_sort |
carbonyl sulfide in air extracted from a south pole ice core: a 2000 year record |
publishDate |
2018 |
url |
https://doi.org/10.5194/acp-8-7533-2008 https://www.atmos-chem-phys.net/8/7533/2008/ |
geographic |
Antarctic East Antarctica South Pole |
geographic_facet |
Antarctic East Antarctica South Pole |
genre |
Antarc* Antarctic Antarctica East Antarctica ice core South pole South pole |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica ice core South pole South pole |
op_source |
eISSN: 1680-7324 |
op_relation |
doi:10.5194/acp-8-7533-2008 https://www.atmos-chem-phys.net/8/7533/2008/ |
op_doi |
https://doi.org/10.5194/acp-8-7533-2008 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
8 |
container_issue |
24 |
container_start_page |
7533 |
op_container_end_page |
7542 |
_version_ |
1766232676469047296 |