Extreme 13 C depletion of CCl 2 F 2 in firn air samples from NEEM, Greenland
A series of 12 high volume air samples collected from the S2 firn core during the North Greenland Eemian Ice Drilling (NEEM) 2009 campaign have been measured for mixing ratio and stable carbon isotope composition of the chlorofluorocarbon CFC-12 (CCl 2 F 2 ). While the mixing ratio measurements comp...
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ftdoajarticles:oai:doaj.org/article:fadfac95c198445e9110d1137e26156f 2023-05-15T16:27:51+02:00 Extreme 13 C depletion of CCl 2 F 2 in firn air samples from NEEM, Greenland T. Blunier V. Petrenko D. Etheridge E. Witrant J. Kaiser R. Schneider P. Martinerie R. Holzinger A. Zuiderweg T. Röckmann 2013-01-01T00:00:00Z https://doi.org/10.5194/acp-13-599-2013 https://doaj.org/article/fadfac95c198445e9110d1137e26156f EN eng Copernicus Publications http://www.atmos-chem-phys.net/13/599/2013/acp-13-599-2013.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 doi:10.5194/acp-13-599-2013 1680-7316 1680-7324 https://doaj.org/article/fadfac95c198445e9110d1137e26156f Atmospheric Chemistry and Physics, Vol 13, Iss 2, Pp 599-609 (2013) Physics QC1-999 Chemistry QD1-999 article 2013 ftdoajarticles https://doi.org/10.5194/acp-13-599-2013 2022-12-31T11:49:23Z A series of 12 high volume air samples collected from the S2 firn core during the North Greenland Eemian Ice Drilling (NEEM) 2009 campaign have been measured for mixing ratio and stable carbon isotope composition of the chlorofluorocarbon CFC-12 (CCl 2 F 2 ). While the mixing ratio measurements compare favorably to other firn air studies, the isotope results show extreme 13 C depletion at the deepest measurable depth (65 m), to values lower than δ 13 C = −80‰ vs. VPDB (the international stable carbon isotope scale), compared to present day surface tropospheric measurements near −40‰. Firn air modeling was used to interpret these measurements. Reconstructed atmospheric time series indicate even larger depletions (to −120‰) near 1950 AD, with subsequent rapid enrichment of the atmospheric reservoir of the compound to the present day value. Mass-balance calculations show that this change is likely to have been caused by a large change in the isotopic composition of anthropogenic CFC-12 emissions, probably due to technological advances in the CFC production process over the last 80 yr, though direct evidence is lacking. Article in Journal/Newspaper Greenland North Greenland Directory of Open Access Journals: DOAJ Articles Greenland Atmospheric Chemistry and Physics 13 2 599 609 |
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Directory of Open Access Journals: DOAJ Articles |
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English |
topic |
Physics QC1-999 Chemistry QD1-999 |
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Physics QC1-999 Chemistry QD1-999 T. Blunier V. Petrenko D. Etheridge E. Witrant J. Kaiser R. Schneider P. Martinerie R. Holzinger A. Zuiderweg T. Röckmann Extreme 13 C depletion of CCl 2 F 2 in firn air samples from NEEM, Greenland |
topic_facet |
Physics QC1-999 Chemistry QD1-999 |
description |
A series of 12 high volume air samples collected from the S2 firn core during the North Greenland Eemian Ice Drilling (NEEM) 2009 campaign have been measured for mixing ratio and stable carbon isotope composition of the chlorofluorocarbon CFC-12 (CCl 2 F 2 ). While the mixing ratio measurements compare favorably to other firn air studies, the isotope results show extreme 13 C depletion at the deepest measurable depth (65 m), to values lower than δ 13 C = −80‰ vs. VPDB (the international stable carbon isotope scale), compared to present day surface tropospheric measurements near −40‰. Firn air modeling was used to interpret these measurements. Reconstructed atmospheric time series indicate even larger depletions (to −120‰) near 1950 AD, with subsequent rapid enrichment of the atmospheric reservoir of the compound to the present day value. Mass-balance calculations show that this change is likely to have been caused by a large change in the isotopic composition of anthropogenic CFC-12 emissions, probably due to technological advances in the CFC production process over the last 80 yr, though direct evidence is lacking. |
format |
Article in Journal/Newspaper |
author |
T. Blunier V. Petrenko D. Etheridge E. Witrant J. Kaiser R. Schneider P. Martinerie R. Holzinger A. Zuiderweg T. Röckmann |
author_facet |
T. Blunier V. Petrenko D. Etheridge E. Witrant J. Kaiser R. Schneider P. Martinerie R. Holzinger A. Zuiderweg T. Röckmann |
author_sort |
T. Blunier |
title |
Extreme 13 C depletion of CCl 2 F 2 in firn air samples from NEEM, Greenland |
title_short |
Extreme 13 C depletion of CCl 2 F 2 in firn air samples from NEEM, Greenland |
title_full |
Extreme 13 C depletion of CCl 2 F 2 in firn air samples from NEEM, Greenland |
title_fullStr |
Extreme 13 C depletion of CCl 2 F 2 in firn air samples from NEEM, Greenland |
title_full_unstemmed |
Extreme 13 C depletion of CCl 2 F 2 in firn air samples from NEEM, Greenland |
title_sort |
extreme 13 c depletion of ccl 2 f 2 in firn air samples from neem, greenland |
publisher |
Copernicus Publications |
publishDate |
2013 |
url |
https://doi.org/10.5194/acp-13-599-2013 https://doaj.org/article/fadfac95c198445e9110d1137e26156f |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland North Greenland |
genre_facet |
Greenland North Greenland |
op_source |
Atmospheric Chemistry and Physics, Vol 13, Iss 2, Pp 599-609 (2013) |
op_relation |
http://www.atmos-chem-phys.net/13/599/2013/acp-13-599-2013.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 doi:10.5194/acp-13-599-2013 1680-7316 1680-7324 https://doaj.org/article/fadfac95c198445e9110d1137e26156f |
op_doi |
https://doi.org/10.5194/acp-13-599-2013 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
13 |
container_issue |
2 |
container_start_page |
599 |
op_container_end_page |
609 |
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