Trends of halon gases in polar firn air: implications for their emission distributions
International audience Four halons (H-1301, H-1211, H-2402 and H-1202) have been measured in air samples collected from polar firn from Dome Concordia (Dome C), Antarctica, from Devon Island, Canada and the North Greenland Ice Core Project (NGRIP) site, Greenland. H-2402 and H-1202 are reported for...
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Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2005
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Online Access: | https://hal.science/hal-00328398 https://hal.science/hal-00328398/document https://hal.science/hal-00328398/file/acp-5-2055-2005.pdf |
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openpolar |
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Open Polar |
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Université Grenoble Alpes: HAL |
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ftunigrenoble |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Reeves, C. E. Sturges, W. T. Sturrock, G. A. Preston, K. Oram, D. E. Schwander, J. Mulvaney, R. Barnola, J.-M. Chappellaz, J. Trends of halon gases in polar firn air: implications for their emission distributions |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience Four halons (H-1301, H-1211, H-2402 and H-1202) have been measured in air samples collected from polar firn from Dome Concordia (Dome C), Antarctica, from Devon Island, Canada and the North Greenland Ice Core Project (NGRIP) site, Greenland. H-2402 and H-1202 are reported for the first time in firn air. The depth profiles show the concentrations of all four halons to be close to zero (i.e. below the detection limit of 0.001 ppt) at the base of the firn thus demonstrating their entirely anthropogenic origin. This is the first evidence of this for H-2402 and H-1202. A 2-D atmospheric model was run with emissions previously derived using archive air measurements from the southern hemisphere mid-latitudes to produce historical trends in atmospheric concentrations at the firn sites, which were then input into a firn diffusion model to produce concentration depth profiles for comparison with the firn measurements. This comparison provides an evaluation of the model-derived atmospheric concentration histories in both hemispheres and thus an indirect evaluation of the emission rates and distributions used in the atmospheric model. Atmospheric concentration trends produced using global emissions previously determined from measurements at Cape Grim are found to be consistent with the firn data from the southern hemisphere. Further emissions of H-1202 in recent years (late 1980s onwards) are likely to have come from latitudes mostly south of 40° N, but emissions prior to that may have come from further north. Emissions of H-1211 may also have shifted to latitudes south of 40° N during the late 1980s. Following comparison of the atmospheric model output with the firn data, modelled atmospheric trends of total organic bromine in the form of halons were derived for both polar regions. |
author2 |
School of Environmental Sciences Norwich University of East Anglia Norwich (UEA) Physics Institute British Antarctic Survey (BAS) Natural Environment Research Council (NERC) Laboratoire de glaciologie et géophysique de l'environnement (LGGE) Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Reeves, C. E. Sturges, W. T. Sturrock, G. A. Preston, K. Oram, D. E. Schwander, J. Mulvaney, R. Barnola, J.-M. Chappellaz, J. |
author_facet |
Reeves, C. E. Sturges, W. T. Sturrock, G. A. Preston, K. Oram, D. E. Schwander, J. Mulvaney, R. Barnola, J.-M. Chappellaz, J. |
author_sort |
Reeves, C. E. |
title |
Trends of halon gases in polar firn air: implications for their emission distributions |
title_short |
Trends of halon gases in polar firn air: implications for their emission distributions |
title_full |
Trends of halon gases in polar firn air: implications for their emission distributions |
title_fullStr |
Trends of halon gases in polar firn air: implications for their emission distributions |
title_full_unstemmed |
Trends of halon gases in polar firn air: implications for their emission distributions |
title_sort |
trends of halon gases in polar firn air: implications for their emission distributions |
publisher |
HAL CCSD |
publishDate |
2005 |
url |
https://hal.science/hal-00328398 https://hal.science/hal-00328398/document https://hal.science/hal-00328398/file/acp-5-2055-2005.pdf |
genre |
Antarc* Antarctica Devon Island Greenland Greenland ice core Greenland Ice core Project ice core NGRIP North Greenland North Greenland Ice Core Project |
genre_facet |
Antarc* Antarctica Devon Island Greenland Greenland ice core Greenland Ice core Project ice core NGRIP North Greenland North Greenland Ice Core Project |
op_source |
ISSN: 1680-7316 EISSN: 1680-7324 Atmospheric Chemistry and Physics https://hal.science/hal-00328398 Atmospheric Chemistry and Physics, 2005, 5 (8), pp.2064 |
op_relation |
hal-00328398 https://hal.science/hal-00328398 https://hal.science/hal-00328398/document https://hal.science/hal-00328398/file/acp-5-2055-2005.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1799481058636333056 |
spelling |
ftunigrenoble:oai:HAL:hal-00328398v1 2024-05-19T07:29:43+00:00 Trends of halon gases in polar firn air: implications for their emission distributions Reeves, C. E. Sturges, W. T. Sturrock, G. A. Preston, K. Oram, D. E. Schwander, J. Mulvaney, R. Barnola, J.-M. Chappellaz, J. School of Environmental Sciences Norwich University of East Anglia Norwich (UEA) Physics Institute British Antarctic Survey (BAS) Natural Environment Research Council (NERC) Laboratoire de glaciologie et géophysique de l'environnement (LGGE) Observatoire des Sciences de l'Univers de Grenoble (OSUG) Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut national des sciences de l'Univers (INSU - CNRS)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Université Savoie Mont Blanc (USMB Université de Savoie Université de Chambéry )-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS) 2005-08-08 https://hal.science/hal-00328398 https://hal.science/hal-00328398/document https://hal.science/hal-00328398/file/acp-5-2055-2005.pdf en eng HAL CCSD European Geosciences Union hal-00328398 https://hal.science/hal-00328398 https://hal.science/hal-00328398/document https://hal.science/hal-00328398/file/acp-5-2055-2005.pdf info:eu-repo/semantics/OpenAccess ISSN: 1680-7316 EISSN: 1680-7324 Atmospheric Chemistry and Physics https://hal.science/hal-00328398 Atmospheric Chemistry and Physics, 2005, 5 (8), pp.2064 [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2005 ftunigrenoble 2024-04-25T00:27:59Z International audience Four halons (H-1301, H-1211, H-2402 and H-1202) have been measured in air samples collected from polar firn from Dome Concordia (Dome C), Antarctica, from Devon Island, Canada and the North Greenland Ice Core Project (NGRIP) site, Greenland. H-2402 and H-1202 are reported for the first time in firn air. The depth profiles show the concentrations of all four halons to be close to zero (i.e. below the detection limit of 0.001 ppt) at the base of the firn thus demonstrating their entirely anthropogenic origin. This is the first evidence of this for H-2402 and H-1202. A 2-D atmospheric model was run with emissions previously derived using archive air measurements from the southern hemisphere mid-latitudes to produce historical trends in atmospheric concentrations at the firn sites, which were then input into a firn diffusion model to produce concentration depth profiles for comparison with the firn measurements. This comparison provides an evaluation of the model-derived atmospheric concentration histories in both hemispheres and thus an indirect evaluation of the emission rates and distributions used in the atmospheric model. Atmospheric concentration trends produced using global emissions previously determined from measurements at Cape Grim are found to be consistent with the firn data from the southern hemisphere. Further emissions of H-1202 in recent years (late 1980s onwards) are likely to have come from latitudes mostly south of 40° N, but emissions prior to that may have come from further north. Emissions of H-1211 may also have shifted to latitudes south of 40° N during the late 1980s. Following comparison of the atmospheric model output with the firn data, modelled atmospheric trends of total organic bromine in the form of halons were derived for both polar regions. Article in Journal/Newspaper Antarc* Antarctica Devon Island Greenland Greenland ice core Greenland Ice core Project ice core NGRIP North Greenland North Greenland Ice Core Project Université Grenoble Alpes: HAL |