The NOx dependence of bromine chemistry in the Arctic atmospheric boundary layer
Arctic boundary layer nitrogen oxides (NOx = NO2 + NO) are naturally produced in and released from the sunlit snowpack and range between 10 to 100 pptv in the remote background surface layer air. These nitrogen oxides have significant effects on the partitioning and cycling of reactive radicals such...
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2015
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00044143 2023-05-15T14:48:23+02:00 The NOx dependence of bromine chemistry in the Arctic atmospheric boundary layer Custard, K. D. Thompson, C. R. Pratt, K. A. Shepson, P B. Liao, J. Huey, L. G. Orlando, J. J. Weinheimer, A. J. Apel, E. Hall, S. R. Flocke, F. Mauldin, L. Hornbrook, R. S. Pöhler, D. General, S. Zielcke, J. Simpson, W. R. Platt, U. Fried, A. Weibring, P. Sive, B. C. Ullmann, K. Cantrell, C. Knapp, D. J. Montzka, D. D. 2015-09 electronic https://doi.org/10.5194/acp-15-10799-2015 https://noa.gwlb.de/receive/cop_mods_00044143 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00043763/acp-15-10799-2015.pdf https://acp.copernicus.org/articles/15/10799/2015/acp-15-10799-2015.pdf eng eng Copernicus Publications Atmospheric Chemistry and Physics -- http://www.atmos-chem-phys.net/volumes_and_issues.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2069847 -- 1680-7324 https://doi.org/10.5194/acp-15-10799-2015 https://noa.gwlb.de/receive/cop_mods_00044143 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00043763/acp-15-10799-2015.pdf https://acp.copernicus.org/articles/15/10799/2015/acp-15-10799-2015.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2015 ftnonlinearchiv https://doi.org/10.5194/acp-15-10799-2015 2022-02-08T22:40:13Z Arctic boundary layer nitrogen oxides (NOx = NO2 + NO) are naturally produced in and released from the sunlit snowpack and range between 10 to 100 pptv in the remote background surface layer air. These nitrogen oxides have significant effects on the partitioning and cycling of reactive radicals such as halogens and HOx (OH + HO2). However, little is known about the impacts of local anthropogenic NOx emission sources on gas-phase halogen chemistry in the Arctic, and this is important because these emissions can induce large variability in ambient NOx and thus local chemistry. In this study, a zero-dimensional photochemical kinetics model was used to investigate the influence of NOx on the unique springtime halogen and HOx chemistry in the Arctic. Trace gas measurements obtained during the 2009 OASIS (Ocean – Atmosphere – Sea Ice – Snowpack) field campaign at Barrow, AK were used to constrain many model inputs. We find that elevated NOx significantly impedes gas-phase halogen radical-based depletion of ozone, through the production of a variety of reservoir species, including HNO3, HO2NO2, peroxyacetyl nitrate (PAN), BrNO2, ClNO2 and reductions in BrO and HOBr. The effective removal of BrO by anthropogenic NOx was directly observed from measurements conducted near Prudhoe Bay, AK during the 2012 Bromine, Ozone, and Mercury Experiment (BROMEX). Thus, while changes in snow-covered sea ice attributable to climate change may alter the availability of molecular halogens for ozone and Hg depletion, predicting the impact of climate change on polar atmospheric chemistry is complex and must take into account the simultaneous impact of changes in the distribution and intensity of anthropogenic combustion sources. This is especially true for the Arctic, where NOx emissions are expected to increase because of increasing oil and gas extraction and shipping activities. Article in Journal/Newspaper Arctic Climate change Prudhoe Bay Sea ice Niedersächsisches Online-Archiv NOA Arctic Atmospheric Chemistry and Physics 15 18 10799 10809 |
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Open Polar |
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Niedersächsisches Online-Archiv NOA |
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ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
spellingShingle |
article Verlagsveröffentlichung Custard, K. D. Thompson, C. R. Pratt, K. A. Shepson, P B. Liao, J. Huey, L. G. Orlando, J. J. Weinheimer, A. J. Apel, E. Hall, S. R. Flocke, F. Mauldin, L. Hornbrook, R. S. Pöhler, D. General, S. Zielcke, J. Simpson, W. R. Platt, U. Fried, A. Weibring, P. Sive, B. C. Ullmann, K. Cantrell, C. Knapp, D. J. Montzka, D. D. The NOx dependence of bromine chemistry in the Arctic atmospheric boundary layer |
topic_facet |
article Verlagsveröffentlichung |
description |
Arctic boundary layer nitrogen oxides (NOx = NO2 + NO) are naturally produced in and released from the sunlit snowpack and range between 10 to 100 pptv in the remote background surface layer air. These nitrogen oxides have significant effects on the partitioning and cycling of reactive radicals such as halogens and HOx (OH + HO2). However, little is known about the impacts of local anthropogenic NOx emission sources on gas-phase halogen chemistry in the Arctic, and this is important because these emissions can induce large variability in ambient NOx and thus local chemistry. In this study, a zero-dimensional photochemical kinetics model was used to investigate the influence of NOx on the unique springtime halogen and HOx chemistry in the Arctic. Trace gas measurements obtained during the 2009 OASIS (Ocean – Atmosphere – Sea Ice – Snowpack) field campaign at Barrow, AK were used to constrain many model inputs. We find that elevated NOx significantly impedes gas-phase halogen radical-based depletion of ozone, through the production of a variety of reservoir species, including HNO3, HO2NO2, peroxyacetyl nitrate (PAN), BrNO2, ClNO2 and reductions in BrO and HOBr. The effective removal of BrO by anthropogenic NOx was directly observed from measurements conducted near Prudhoe Bay, AK during the 2012 Bromine, Ozone, and Mercury Experiment (BROMEX). Thus, while changes in snow-covered sea ice attributable to climate change may alter the availability of molecular halogens for ozone and Hg depletion, predicting the impact of climate change on polar atmospheric chemistry is complex and must take into account the simultaneous impact of changes in the distribution and intensity of anthropogenic combustion sources. This is especially true for the Arctic, where NOx emissions are expected to increase because of increasing oil and gas extraction and shipping activities. |
format |
Article in Journal/Newspaper |
author |
Custard, K. D. Thompson, C. R. Pratt, K. A. Shepson, P B. Liao, J. Huey, L. G. Orlando, J. J. Weinheimer, A. J. Apel, E. Hall, S. R. Flocke, F. Mauldin, L. Hornbrook, R. S. Pöhler, D. General, S. Zielcke, J. Simpson, W. R. Platt, U. Fried, A. Weibring, P. Sive, B. C. Ullmann, K. Cantrell, C. Knapp, D. J. Montzka, D. D. |
author_facet |
Custard, K. D. Thompson, C. R. Pratt, K. A. Shepson, P B. Liao, J. Huey, L. G. Orlando, J. J. Weinheimer, A. J. Apel, E. Hall, S. R. Flocke, F. Mauldin, L. Hornbrook, R. S. Pöhler, D. General, S. Zielcke, J. Simpson, W. R. Platt, U. Fried, A. Weibring, P. Sive, B. C. Ullmann, K. Cantrell, C. Knapp, D. J. Montzka, D. D. |
author_sort |
Custard, K. D. |
title |
The NOx dependence of bromine chemistry in the Arctic atmospheric boundary layer |
title_short |
The NOx dependence of bromine chemistry in the Arctic atmospheric boundary layer |
title_full |
The NOx dependence of bromine chemistry in the Arctic atmospheric boundary layer |
title_fullStr |
The NOx dependence of bromine chemistry in the Arctic atmospheric boundary layer |
title_full_unstemmed |
The NOx dependence of bromine chemistry in the Arctic atmospheric boundary layer |
title_sort |
nox dependence of bromine chemistry in the arctic atmospheric boundary layer |
publisher |
Copernicus Publications |
publishDate |
2015 |
url |
https://doi.org/10.5194/acp-15-10799-2015 https://noa.gwlb.de/receive/cop_mods_00044143 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00043763/acp-15-10799-2015.pdf https://acp.copernicus.org/articles/15/10799/2015/acp-15-10799-2015.pdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Climate change Prudhoe Bay Sea ice |
genre_facet |
Arctic Climate change Prudhoe Bay Sea ice |
op_relation |
Atmospheric Chemistry and Physics -- http://www.atmos-chem-phys.net/volumes_and_issues.html -- http://www.bibliothek.uni-regensburg.de/ezeit/?2069847 -- 1680-7324 https://doi.org/10.5194/acp-15-10799-2015 https://noa.gwlb.de/receive/cop_mods_00044143 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00043763/acp-15-10799-2015.pdf https://acp.copernicus.org/articles/15/10799/2015/acp-15-10799-2015.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/acp-15-10799-2015 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
15 |
container_issue |
18 |
container_start_page |
10799 |
op_container_end_page |
10809 |
_version_ |
1766319465851518976 |