20th century trends and budget implications of chloroform and related tri-and dihalomethanes inferred from firn air
International audience Four trihalomethane (THM; CHCl 3 , CHBrCl 2 , CHBr 2 Cl and CHBr 3 ) and two dihalomethane (DHM; CH 2 BrCl and CH 2 Br 2 ) trace gases have been measured in air extracted from polar firn collected at the North Greenland Icecore Project (NGRIP) site. CHCl 3 was also measured in...
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ftunivsavoie:oai:HAL:hal-00328449v1 2024-05-19T07:28:42+00:00 20th century trends and budget implications of chloroform and related tri-and dihalomethanes inferred from firn air Worton, D. R. Sturges, W. T. 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) 2006-07-12 https://hal.science/hal-00328449 https://hal.science/hal-00328449/document https://hal.science/hal-00328449/file/acp-6-2847-2006.pdf en eng HAL CCSD European Geosciences Union hal-00328449 https://hal.science/hal-00328449 https://hal.science/hal-00328449/document https://hal.science/hal-00328449/file/acp-6-2847-2006.pdf info:eu-repo/semantics/OpenAccess ISSN: 1680-7316 EISSN: 1680-7324 Atmospheric Chemistry and Physics https://hal.science/hal-00328449 Atmospheric Chemistry and Physics, 2006, 6 (10), pp.2863 [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2006 ftunivsavoie 2024-04-25T00:13:12Z International audience Four trihalomethane (THM; CHCl 3 , CHBrCl 2 , CHBr 2 Cl and CHBr 3 ) and two dihalomethane (DHM; CH 2 BrCl and CH 2 Br 2 ) trace gases have been measured in air extracted from polar firn collected at the North Greenland Icecore Project (NGRIP) site. CHCl 3 was also measured in firn air from Devon Island (DI), Canada, Dronning Maud Land (DML), Antarctica and Dome Concordia (Dome C), Antarctica. All of these species are believed to be almost entirely of natural origin except for CHCl 3 where anthropogenic sources have been reported to contribute ~10% to the global burden. A 2-D atmospheric model was run for CHCl 3 using reported emission estimates to produce historical atmospheric trends at the firn sites, which were then input into a firn diffusion model to produce concentration depth profiles that were compared against the measurements. The anthropogenic emissions were modified in order to give the best model fit to the firn data at NGRIP, Dome C and DML. As a result, the contribution of CHCl 3 from anthropogenic sources, mainly from pulp and paper manufacture, to the total chloroform budget appears to have been considerably underestimated and was likely to have been close to ~50% at the maximum in atmospheric CHCl 3 concentrations around 1990, declining to ~29% at the beginning of the 21st century. We also show that the atmospheric burden of the brominated THM's in the Northern Hemisphere have increased over the 20th century while CH 2 Br 2 has remained constant over time implying that it is entirely of natural origin. Article in Journal/Newspaper Antarc* Antarctica Devon Island DML Dronning Maud Land Greenland NGRIP North Greenland Université Savoie Mont Blanc: HAL |
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Open Polar |
collection |
Université Savoie Mont Blanc: HAL |
op_collection_id |
ftunivsavoie |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Worton, D. R. Sturges, W. T. Schwander, J. Mulvaney, R. Barnola, J.-M. Chappellaz, J. 20th century trends and budget implications of chloroform and related tri-and dihalomethanes inferred from firn air |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience Four trihalomethane (THM; CHCl 3 , CHBrCl 2 , CHBr 2 Cl and CHBr 3 ) and two dihalomethane (DHM; CH 2 BrCl and CH 2 Br 2 ) trace gases have been measured in air extracted from polar firn collected at the North Greenland Icecore Project (NGRIP) site. CHCl 3 was also measured in firn air from Devon Island (DI), Canada, Dronning Maud Land (DML), Antarctica and Dome Concordia (Dome C), Antarctica. All of these species are believed to be almost entirely of natural origin except for CHCl 3 where anthropogenic sources have been reported to contribute ~10% to the global burden. A 2-D atmospheric model was run for CHCl 3 using reported emission estimates to produce historical atmospheric trends at the firn sites, which were then input into a firn diffusion model to produce concentration depth profiles that were compared against the measurements. The anthropogenic emissions were modified in order to give the best model fit to the firn data at NGRIP, Dome C and DML. As a result, the contribution of CHCl 3 from anthropogenic sources, mainly from pulp and paper manufacture, to the total chloroform budget appears to have been considerably underestimated and was likely to have been close to ~50% at the maximum in atmospheric CHCl 3 concentrations around 1990, declining to ~29% at the beginning of the 21st century. We also show that the atmospheric burden of the brominated THM's in the Northern Hemisphere have increased over the 20th century while CH 2 Br 2 has remained constant over time implying that it is entirely of natural origin. |
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 |
Worton, D. R. Sturges, W. T. Schwander, J. Mulvaney, R. Barnola, J.-M. Chappellaz, J. |
author_facet |
Worton, D. R. Sturges, W. T. Schwander, J. Mulvaney, R. Barnola, J.-M. Chappellaz, J. |
author_sort |
Worton, D. R. |
title |
20th century trends and budget implications of chloroform and related tri-and dihalomethanes inferred from firn air |
title_short |
20th century trends and budget implications of chloroform and related tri-and dihalomethanes inferred from firn air |
title_full |
20th century trends and budget implications of chloroform and related tri-and dihalomethanes inferred from firn air |
title_fullStr |
20th century trends and budget implications of chloroform and related tri-and dihalomethanes inferred from firn air |
title_full_unstemmed |
20th century trends and budget implications of chloroform and related tri-and dihalomethanes inferred from firn air |
title_sort |
20th century trends and budget implications of chloroform and related tri-and dihalomethanes inferred from firn air |
publisher |
HAL CCSD |
publishDate |
2006 |
url |
https://hal.science/hal-00328449 https://hal.science/hal-00328449/document https://hal.science/hal-00328449/file/acp-6-2847-2006.pdf |
genre |
Antarc* Antarctica Devon Island DML Dronning Maud Land Greenland NGRIP North Greenland |
genre_facet |
Antarc* Antarctica Devon Island DML Dronning Maud Land Greenland NGRIP North Greenland |
op_source |
ISSN: 1680-7316 EISSN: 1680-7324 Atmospheric Chemistry and Physics https://hal.science/hal-00328449 Atmospheric Chemistry and Physics, 2006, 6 (10), pp.2863 |
op_relation |
hal-00328449 https://hal.science/hal-00328449 https://hal.science/hal-00328449/document https://hal.science/hal-00328449/file/acp-6-2847-2006.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1799475572297957376 |