Atmospheric nitrogen oxides (NO and NO 2 ) at Dome C, East Antarctica, during the OPALE campaign
Mixing ratios of the atmospheric nitrogen oxides NO and NO 2 were measured as part of the OPALE (Oxidant Production in Antarctic Lands & Export) campaign at Dome C, East Antarctica (75.1° S, 123.3° E, 3233 m), during December 2011 to January 2012. Profiles of NO x mixing ratios of the lower 100...
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ftdoajarticles:oai:doaj.org/article:38b18168cbb44858bfbe5c90975ff0c5 2023-05-15T13:43:10+02:00 Atmospheric nitrogen oxides (NO and NO 2 ) at Dome C, East Antarctica, during the OPALE campaign M. M. Frey H. K. Roscoe A. Kukui J. Savarino J. L. France M. D. King M. Legrand S. Preunkert 2015-07-01T00:00:00Z https://doi.org/10.5194/acp-15-7859-2015 https://doaj.org/article/38b18168cbb44858bfbe5c90975ff0c5 EN eng Copernicus Publications http://www.atmos-chem-phys.net/15/7859/2015/acp-15-7859-2015.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 1680-7316 1680-7324 doi:10.5194/acp-15-7859-2015 https://doaj.org/article/38b18168cbb44858bfbe5c90975ff0c5 Atmospheric Chemistry and Physics, Vol 15, Iss 14, Pp 7859-7875 (2015) Physics QC1-999 Chemistry QD1-999 article 2015 ftdoajarticles https://doi.org/10.5194/acp-15-7859-2015 2022-12-30T21:27:47Z Mixing ratios of the atmospheric nitrogen oxides NO and NO 2 were measured as part of the OPALE (Oxidant Production in Antarctic Lands & Export) campaign at Dome C, East Antarctica (75.1° S, 123.3° E, 3233 m), during December 2011 to January 2012. Profiles of NO x mixing ratios of the lower 100 m of the atmosphere confirm that, in contrast to the South Pole, air chemistry at Dome C is strongly influenced by large diurnal cycles in solar irradiance and a sudden collapse of the atmospheric boundary layer in the early evening. Depth profiles of mixing ratios in firn air suggest that the upper snowpack at Dome C holds a significant reservoir of photolytically produced NO 2 and is a sink of gas-phase ozone (O 3 ). First-time observations of bromine oxide (BrO) at Dome C show that mixing ratios of BrO near the ground are low, certainly less than 5 pptv, with higher levels in the free troposphere. Assuming steady state, observed mixing ratios of BrO and RO 2 radicals are too low to explain the large NO 2 : NO ratios found in ambient air, possibly indicating the existence of an unknown process contributing to the atmospheric chemistry of reactive nitrogen above the Antarctic Plateau. During 2011–2012, NO x mixing ratios and flux were larger than in 2009–2010, consistent with also larger surface O 3 mixing ratios resulting from increased net O 3 production. Large NO x mixing ratios at Dome C arise from a combination of continuous sunlight, shallow mixing height and significant NO x emissions by surface snow ( F NO x ). During 23 December 2011–12 January 2012, median F NO x was twice that during the same period in 2009–2010 due to significantly larger atmospheric turbulence and a slightly stronger snowpack source. A tripling of F NO x in December 2011 was largely due to changes in snowpack source strength caused primarily by changes in NO 3 − concentrations in the snow skin layer, and only to a secondary order by decrease of total column O 3 and associated increase in NO 3 − photolysis rates. A source of uncertainty ... Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica South pole South pole Directory of Open Access Journals: DOAJ Articles Antarctic The Antarctic East Antarctica South Pole Atmospheric Chemistry and Physics 15 14 7859 7875 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
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English |
topic |
Physics QC1-999 Chemistry QD1-999 |
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Physics QC1-999 Chemistry QD1-999 M. M. Frey H. K. Roscoe A. Kukui J. Savarino J. L. France M. D. King M. Legrand S. Preunkert Atmospheric nitrogen oxides (NO and NO 2 ) at Dome C, East Antarctica, during the OPALE campaign |
topic_facet |
Physics QC1-999 Chemistry QD1-999 |
description |
Mixing ratios of the atmospheric nitrogen oxides NO and NO 2 were measured as part of the OPALE (Oxidant Production in Antarctic Lands & Export) campaign at Dome C, East Antarctica (75.1° S, 123.3° E, 3233 m), during December 2011 to January 2012. Profiles of NO x mixing ratios of the lower 100 m of the atmosphere confirm that, in contrast to the South Pole, air chemistry at Dome C is strongly influenced by large diurnal cycles in solar irradiance and a sudden collapse of the atmospheric boundary layer in the early evening. Depth profiles of mixing ratios in firn air suggest that the upper snowpack at Dome C holds a significant reservoir of photolytically produced NO 2 and is a sink of gas-phase ozone (O 3 ). First-time observations of bromine oxide (BrO) at Dome C show that mixing ratios of BrO near the ground are low, certainly less than 5 pptv, with higher levels in the free troposphere. Assuming steady state, observed mixing ratios of BrO and RO 2 radicals are too low to explain the large NO 2 : NO ratios found in ambient air, possibly indicating the existence of an unknown process contributing to the atmospheric chemistry of reactive nitrogen above the Antarctic Plateau. During 2011–2012, NO x mixing ratios and flux were larger than in 2009–2010, consistent with also larger surface O 3 mixing ratios resulting from increased net O 3 production. Large NO x mixing ratios at Dome C arise from a combination of continuous sunlight, shallow mixing height and significant NO x emissions by surface snow ( F NO x ). During 23 December 2011–12 January 2012, median F NO x was twice that during the same period in 2009–2010 due to significantly larger atmospheric turbulence and a slightly stronger snowpack source. A tripling of F NO x in December 2011 was largely due to changes in snowpack source strength caused primarily by changes in NO 3 − concentrations in the snow skin layer, and only to a secondary order by decrease of total column O 3 and associated increase in NO 3 − photolysis rates. A source of uncertainty ... |
format |
Article in Journal/Newspaper |
author |
M. M. Frey H. K. Roscoe A. Kukui J. Savarino J. L. France M. D. King M. Legrand S. Preunkert |
author_facet |
M. M. Frey H. K. Roscoe A. Kukui J. Savarino J. L. France M. D. King M. Legrand S. Preunkert |
author_sort |
M. M. Frey |
title |
Atmospheric nitrogen oxides (NO and NO 2 ) at Dome C, East Antarctica, during the OPALE campaign |
title_short |
Atmospheric nitrogen oxides (NO and NO 2 ) at Dome C, East Antarctica, during the OPALE campaign |
title_full |
Atmospheric nitrogen oxides (NO and NO 2 ) at Dome C, East Antarctica, during the OPALE campaign |
title_fullStr |
Atmospheric nitrogen oxides (NO and NO 2 ) at Dome C, East Antarctica, during the OPALE campaign |
title_full_unstemmed |
Atmospheric nitrogen oxides (NO and NO 2 ) at Dome C, East Antarctica, during the OPALE campaign |
title_sort |
atmospheric nitrogen oxides (no and no 2 ) at dome c, east antarctica, during the opale campaign |
publisher |
Copernicus Publications |
publishDate |
2015 |
url |
https://doi.org/10.5194/acp-15-7859-2015 https://doaj.org/article/38b18168cbb44858bfbe5c90975ff0c5 |
geographic |
Antarctic The Antarctic East Antarctica South Pole |
geographic_facet |
Antarctic The Antarctic East Antarctica South Pole |
genre |
Antarc* Antarctic Antarctica East Antarctica South pole South pole |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica South pole South pole |
op_source |
Atmospheric Chemistry and Physics, Vol 15, Iss 14, Pp 7859-7875 (2015) |
op_relation |
http://www.atmos-chem-phys.net/15/7859/2015/acp-15-7859-2015.pdf https://doaj.org/toc/1680-7316 https://doaj.org/toc/1680-7324 1680-7316 1680-7324 doi:10.5194/acp-15-7859-2015 https://doaj.org/article/38b18168cbb44858bfbe5c90975ff0c5 |
op_doi |
https://doi.org/10.5194/acp-15-7859-2015 |
container_title |
Atmospheric Chemistry and Physics |
container_volume |
15 |
container_issue |
14 |
container_start_page |
7859 |
op_container_end_page |
7875 |
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1766185532347383808 |