Summertime NOx measurements during the CHABLIS campaign: can source and sink estimates unravel observed diurnal cycles?
NOx measurements were conducted at the Halley Research Station, coastal Antarctica, during the austral summer period 1 January–10 February 2005. A clear NOx diurnal cycle was observed with minimum concentrations close to instrumental detection limit (5 pptv) measured between 04:00–05:00 GMT. NOx con...
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00046167 2023-05-15T13:55:42+02:00 Summertime NOx measurements during the CHABLIS campaign: can source and sink estimates unravel observed diurnal cycles? Bauguitte, S. J.-B. Bloss, W. J. Evans, M. J. Salmon, R. A. Anderson, P. S. Jones, A. E. Lee, J. D. Saiz-Lopez, A. Roscoe, H. K. Wolff, E. W. Plane, J. M. C. 2012-01 electronic https://doi.org/10.5194/acp-12-989-2012 https://noa.gwlb.de/receive/cop_mods_00046167 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00045787/acp-12-989-2012.pdf https://acp.copernicus.org/articles/12/989/2012/acp-12-989-2012.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-12-989-2012 https://noa.gwlb.de/receive/cop_mods_00046167 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00045787/acp-12-989-2012.pdf https://acp.copernicus.org/articles/12/989/2012/acp-12-989-2012.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2012 ftnonlinearchiv https://doi.org/10.5194/acp-12-989-2012 2022-02-08T22:39:12Z NOx measurements were conducted at the Halley Research Station, coastal Antarctica, during the austral summer period 1 January–10 February 2005. A clear NOx diurnal cycle was observed with minimum concentrations close to instrumental detection limit (5 pptv) measured between 04:00–05:00 GMT. NOx concentrations peaked (24 pptv) between 19:00–20:00 GMT, approximately 5 h after local solar noon. An optimised box model of NOx concentrations based on production from in-snow nitrate photolysis and chemical loss derives a mean noon emission rate of 3.48 × 108 molec cm−2 s−1, assuming a 100 m boundary layer mixing height, and a relatively short NOx lifetime of ~6.4 h. This emission rate compares to directly measured values ranging from 2.1 to 12.6 × 108 molec cm−2 s−1 made on 3 days at the end of the study period. Calculations of the maximum rate of NO2 loss via a variety of conventional HOx and halogen oxidation processes show that the lifetime of NOx is predominantly controlled by halogen processing, namely BrNO3 and INO3 gas-phase formation and their subsequent heterogeneous uptake. Furthermore the presence of halogen oxides is shown to significantly perturb NOx concentrations by decreasing the NO/NO2 ratio. We conclude that in coastal Antarctica, the potential ozone production efficiency of NOx emitted from the snowpack is mitigated by the more rapid NOx loss due to halogen nitrate hydrolysis. Article in Journal/Newspaper Antarc* Antarctica Niedersächsisches Online-Archiv NOA Austral Halley Research Station ENVELOPE(-26.209,-26.209,-75.605,-75.605) Atmospheric Chemistry and Physics 12 2 989 1002 |
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article Verlagsveröffentlichung Bauguitte, S. J.-B. Bloss, W. J. Evans, M. J. Salmon, R. A. Anderson, P. S. Jones, A. E. Lee, J. D. Saiz-Lopez, A. Roscoe, H. K. Wolff, E. W. Plane, J. M. C. Summertime NOx measurements during the CHABLIS campaign: can source and sink estimates unravel observed diurnal cycles? |
topic_facet |
article Verlagsveröffentlichung |
description |
NOx measurements were conducted at the Halley Research Station, coastal Antarctica, during the austral summer period 1 January–10 February 2005. A clear NOx diurnal cycle was observed with minimum concentrations close to instrumental detection limit (5 pptv) measured between 04:00–05:00 GMT. NOx concentrations peaked (24 pptv) between 19:00–20:00 GMT, approximately 5 h after local solar noon. An optimised box model of NOx concentrations based on production from in-snow nitrate photolysis and chemical loss derives a mean noon emission rate of 3.48 × 108 molec cm−2 s−1, assuming a 100 m boundary layer mixing height, and a relatively short NOx lifetime of ~6.4 h. This emission rate compares to directly measured values ranging from 2.1 to 12.6 × 108 molec cm−2 s−1 made on 3 days at the end of the study period. Calculations of the maximum rate of NO2 loss via a variety of conventional HOx and halogen oxidation processes show that the lifetime of NOx is predominantly controlled by halogen processing, namely BrNO3 and INO3 gas-phase formation and their subsequent heterogeneous uptake. Furthermore the presence of halogen oxides is shown to significantly perturb NOx concentrations by decreasing the NO/NO2 ratio. We conclude that in coastal Antarctica, the potential ozone production efficiency of NOx emitted from the snowpack is mitigated by the more rapid NOx loss due to halogen nitrate hydrolysis. |
format |
Article in Journal/Newspaper |
author |
Bauguitte, S. J.-B. Bloss, W. J. Evans, M. J. Salmon, R. A. Anderson, P. S. Jones, A. E. Lee, J. D. Saiz-Lopez, A. Roscoe, H. K. Wolff, E. W. Plane, J. M. C. |
author_facet |
Bauguitte, S. J.-B. Bloss, W. J. Evans, M. J. Salmon, R. A. Anderson, P. S. Jones, A. E. Lee, J. D. Saiz-Lopez, A. Roscoe, H. K. Wolff, E. W. Plane, J. M. C. |
author_sort |
Bauguitte, S. J.-B. |
title |
Summertime NOx measurements during the CHABLIS campaign: can source and sink estimates unravel observed diurnal cycles? |
title_short |
Summertime NOx measurements during the CHABLIS campaign: can source and sink estimates unravel observed diurnal cycles? |
title_full |
Summertime NOx measurements during the CHABLIS campaign: can source and sink estimates unravel observed diurnal cycles? |
title_fullStr |
Summertime NOx measurements during the CHABLIS campaign: can source and sink estimates unravel observed diurnal cycles? |
title_full_unstemmed |
Summertime NOx measurements during the CHABLIS campaign: can source and sink estimates unravel observed diurnal cycles? |
title_sort |
summertime nox measurements during the chablis campaign: can source and sink estimates unravel observed diurnal cycles? |
publisher |
Copernicus Publications |
publishDate |
2012 |
url |
https://doi.org/10.5194/acp-12-989-2012 https://noa.gwlb.de/receive/cop_mods_00046167 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00045787/acp-12-989-2012.pdf https://acp.copernicus.org/articles/12/989/2012/acp-12-989-2012.pdf |
long_lat |
ENVELOPE(-26.209,-26.209,-75.605,-75.605) |
geographic |
Austral Halley Research Station |
geographic_facet |
Austral Halley Research Station |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
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-12-989-2012 https://noa.gwlb.de/receive/cop_mods_00046167 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00045787/acp-12-989-2012.pdf https://acp.copernicus.org/articles/12/989/2012/acp-12-989-2012.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/acp-12-989-2012 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
12 |
container_issue |
2 |
container_start_page |
989 |
op_container_end_page |
1002 |
_version_ |
1766262499979558912 |