Methanesulfonate in the firn of King George Island, Antarctica
Methanesulfonate was investigated as a potential contributor to the sulfur budget, based on analysis of a firn core from Collins Ice Cap, King George Island, Antarctica (62°10′ S, 58°50′ W). The anion was found to be present at a mean concentration of 0.17 μeq L−1, with a maximum of 0.73 μeq L−1. Da...
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ftuninhampshire:oai:scholars.unh.edu:faculty_pubs-1339 2023-05-15T13:46:10+02:00 Methanesulfonate in the firn of King George Island, Antarctica Jiankang, Han Zichu, Xie Xingping, Zhang Dongsheng, Dai Mayewski, Paul A. Twickler, Mark S. 2001-01-01T08:00:00Z application/pdf https://scholars.unh.edu/faculty_pubs/340 https://scholars.unh.edu/cgi/viewcontent.cgi?article=1339&context=faculty_pubs unknown University of New Hampshire Scholars' Repository https://scholars.unh.edu/faculty_pubs/340 https://scholars.unh.edu/cgi/viewcontent.cgi?article=1339&context=faculty_pubs © International Glaciological Society 2001. http://creativecommons.org/licenses/by/3.0/ CC-BY Faculty Publications text 2001 ftuninhampshire 2023-01-30T21:49:54Z Methanesulfonate was investigated as a potential contributor to the sulfur budget, based on analysis of a firn core from Collins Ice Cap, King George Island, Antarctica (62°10′ S, 58°50′ W). The anion was found to be present at a mean concentration of 0.17 μeq L−1, with a maximum of 0.73 μeq L−1. Dating based on the δ 18O profile suggests that the principal peaks of methanesulfonate are associated with snow deposited in summer and autumn. A careful examination of MSA, SO4 2− and nssSO4 2− profiles indicates that two of the three peaks in the MSA profile may result mainly from migration and relocation of MSA. The mechanism responsible for this might be similar to that for deep cores from other Antarctic glaciers, supporting the migration hypothesis proposed by prior researchers and extending it to near-temperate ice. Due to the post-depositional modification, the main part of the MSA profile of the firn is no longer indicative of the seasonal pattern of MSA in the atmosphere, and the basis for calculation of the MSA/nssSO4 2− ratio should be changed. The MSA/nssS04 2 ratio obtained by a new computation is 0.22, 10% higher than that ignoring the effect of MSA migration. Text Antarc* Antarctic Antarctica Ice cap King George Island University of New Hampshire: Scholars Repository Antarctic King George Island |
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University of New Hampshire: Scholars Repository |
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description |
Methanesulfonate was investigated as a potential contributor to the sulfur budget, based on analysis of a firn core from Collins Ice Cap, King George Island, Antarctica (62°10′ S, 58°50′ W). The anion was found to be present at a mean concentration of 0.17 μeq L−1, with a maximum of 0.73 μeq L−1. Dating based on the δ 18O profile suggests that the principal peaks of methanesulfonate are associated with snow deposited in summer and autumn. A careful examination of MSA, SO4 2− and nssSO4 2− profiles indicates that two of the three peaks in the MSA profile may result mainly from migration and relocation of MSA. The mechanism responsible for this might be similar to that for deep cores from other Antarctic glaciers, supporting the migration hypothesis proposed by prior researchers and extending it to near-temperate ice. Due to the post-depositional modification, the main part of the MSA profile of the firn is no longer indicative of the seasonal pattern of MSA in the atmosphere, and the basis for calculation of the MSA/nssSO4 2− ratio should be changed. The MSA/nssS04 2 ratio obtained by a new computation is 0.22, 10% higher than that ignoring the effect of MSA migration. |
format |
Text |
author |
Jiankang, Han Zichu, Xie Xingping, Zhang Dongsheng, Dai Mayewski, Paul A. Twickler, Mark S. |
spellingShingle |
Jiankang, Han Zichu, Xie Xingping, Zhang Dongsheng, Dai Mayewski, Paul A. Twickler, Mark S. Methanesulfonate in the firn of King George Island, Antarctica |
author_facet |
Jiankang, Han Zichu, Xie Xingping, Zhang Dongsheng, Dai Mayewski, Paul A. Twickler, Mark S. |
author_sort |
Jiankang, Han |
title |
Methanesulfonate in the firn of King George Island, Antarctica |
title_short |
Methanesulfonate in the firn of King George Island, Antarctica |
title_full |
Methanesulfonate in the firn of King George Island, Antarctica |
title_fullStr |
Methanesulfonate in the firn of King George Island, Antarctica |
title_full_unstemmed |
Methanesulfonate in the firn of King George Island, Antarctica |
title_sort |
methanesulfonate in the firn of king george island, antarctica |
publisher |
University of New Hampshire Scholars' Repository |
publishDate |
2001 |
url |
https://scholars.unh.edu/faculty_pubs/340 https://scholars.unh.edu/cgi/viewcontent.cgi?article=1339&context=faculty_pubs |
geographic |
Antarctic King George Island |
geographic_facet |
Antarctic King George Island |
genre |
Antarc* Antarctic Antarctica Ice cap King George Island |
genre_facet |
Antarc* Antarctic Antarctica Ice cap King George Island |
op_source |
Faculty Publications |
op_relation |
https://scholars.unh.edu/faculty_pubs/340 https://scholars.unh.edu/cgi/viewcontent.cgi?article=1339&context=faculty_pubs |
op_rights |
© International Glaciological Society 2001. http://creativecommons.org/licenses/by/3.0/ |
op_rightsnorm |
CC-BY |
_version_ |
1766238060785172480 |