The effect of the novel HO_2 + NO → HNO_3 reaction channel at South Pole, Antarctica
It is well established that the reaction of HO_2 with NO plays a central role in atmospheric chemistry, by way of OH/HO_2 recycling and reduction of ozone depletion by HO_x cycles in the stratosphere and through ozone production in the troposphere. Utilizing a photochemical box model, we investigate...
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Cambridge University Press
2012
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ftcaltechauth:oai:authors.library.caltech.edu:34018 2023-05-15T13:37:29+02:00 The effect of the novel HO_2 + NO → HNO_3 reaction channel at South Pole, Antarctica Boxe, C. S. Hamer, P. D. Ford, W. Hoffmann, M. Shallcross, D. E. 2012-08 application/pdf https://authors.library.caltech.edu/34018/ https://authors.library.caltech.edu/34018/1/Boxe_AntarcSci2012p417.pdf https://resolver.caltech.edu/CaltechAUTHORS:20120912-093539606 en eng Cambridge University Press https://authors.library.caltech.edu/34018/1/Boxe_AntarcSci2012p417.pdf Boxe, C. S. and Hamer, P. D. and Ford, W. and Hoffmann, M. and Shallcross, D. E. (2012) The effect of the novel HO_2 + NO → HNO_3 reaction channel at South Pole, Antarctica. Antarctic Science, 24 (4). pp. 417-425. ISSN 0954-1020. doi:10.1017/S0954102012000144. https://resolver.caltech.edu/CaltechAUTHORS:20120912-093539606 <https://resolver.caltech.edu/CaltechAUTHORS:20120912-093539606> other Article PeerReviewed 2012 ftcaltechauth https://doi.org/10.1017/S0954102012000144 2021-11-11T18:51:07Z It is well established that the reaction of HO_2 with NO plays a central role in atmospheric chemistry, by way of OH/HO_2 recycling and reduction of ozone depletion by HO_x cycles in the stratosphere and through ozone production in the troposphere. Utilizing a photochemical box model, we investigate the impact of the recently observed HNO_3 production channel (HO_2+NO → HNO_3) on NO_x (NO + NO_2), HO_x (OH + HO_2), HNO_3, and O_3 concentrations in the boundary layer at the South Pole, Antarctica. Our simulations exemplify decreases in peak O_3, NO, NO_2, and OH and an increase in HNO_3. Also, mean OH is in better agreement with observations, while worsening the agreement with O_3, HO_2, and HNO_3 concentrations observed at the South Pole. The reduced concentrations of NO_x are consistent with expected decreases in atmospheric NO_x lifetime as a result of increased sequestration of NO_x into HNO_3. Although we show that the inclusion of the novel HNO_3 production channel brings better agreement of OH with field measurements, the modelled ozone and HNO_3 are worsened, and the changes in NO_x lifetime imply that snowpack NO_x emissions and snowpack nitrate recycling must be re-evaluated. Article in Journal/Newspaper Antarc* Antarctic Science Antarctica South pole South pole Caltech Authors (California Institute of Technology) South Pole Antarctic Science 24 4 417 425 |
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Open Polar |
collection |
Caltech Authors (California Institute of Technology) |
op_collection_id |
ftcaltechauth |
language |
English |
description |
It is well established that the reaction of HO_2 with NO plays a central role in atmospheric chemistry, by way of OH/HO_2 recycling and reduction of ozone depletion by HO_x cycles in the stratosphere and through ozone production in the troposphere. Utilizing a photochemical box model, we investigate the impact of the recently observed HNO_3 production channel (HO_2+NO → HNO_3) on NO_x (NO + NO_2), HO_x (OH + HO_2), HNO_3, and O_3 concentrations in the boundary layer at the South Pole, Antarctica. Our simulations exemplify decreases in peak O_3, NO, NO_2, and OH and an increase in HNO_3. Also, mean OH is in better agreement with observations, while worsening the agreement with O_3, HO_2, and HNO_3 concentrations observed at the South Pole. The reduced concentrations of NO_x are consistent with expected decreases in atmospheric NO_x lifetime as a result of increased sequestration of NO_x into HNO_3. Although we show that the inclusion of the novel HNO_3 production channel brings better agreement of OH with field measurements, the modelled ozone and HNO_3 are worsened, and the changes in NO_x lifetime imply that snowpack NO_x emissions and snowpack nitrate recycling must be re-evaluated. |
format |
Article in Journal/Newspaper |
author |
Boxe, C. S. Hamer, P. D. Ford, W. Hoffmann, M. Shallcross, D. E. |
spellingShingle |
Boxe, C. S. Hamer, P. D. Ford, W. Hoffmann, M. Shallcross, D. E. The effect of the novel HO_2 + NO → HNO_3 reaction channel at South Pole, Antarctica |
author_facet |
Boxe, C. S. Hamer, P. D. Ford, W. Hoffmann, M. Shallcross, D. E. |
author_sort |
Boxe, C. S. |
title |
The effect of the novel HO_2 + NO → HNO_3 reaction channel at South Pole, Antarctica |
title_short |
The effect of the novel HO_2 + NO → HNO_3 reaction channel at South Pole, Antarctica |
title_full |
The effect of the novel HO_2 + NO → HNO_3 reaction channel at South Pole, Antarctica |
title_fullStr |
The effect of the novel HO_2 + NO → HNO_3 reaction channel at South Pole, Antarctica |
title_full_unstemmed |
The effect of the novel HO_2 + NO → HNO_3 reaction channel at South Pole, Antarctica |
title_sort |
effect of the novel ho_2 + no → hno_3 reaction channel at south pole, antarctica |
publisher |
Cambridge University Press |
publishDate |
2012 |
url |
https://authors.library.caltech.edu/34018/ https://authors.library.caltech.edu/34018/1/Boxe_AntarcSci2012p417.pdf https://resolver.caltech.edu/CaltechAUTHORS:20120912-093539606 |
geographic |
South Pole |
geographic_facet |
South Pole |
genre |
Antarc* Antarctic Science Antarctica South pole South pole |
genre_facet |
Antarc* Antarctic Science Antarctica South pole South pole |
op_relation |
https://authors.library.caltech.edu/34018/1/Boxe_AntarcSci2012p417.pdf Boxe, C. S. and Hamer, P. D. and Ford, W. and Hoffmann, M. and Shallcross, D. E. (2012) The effect of the novel HO_2 + NO → HNO_3 reaction channel at South Pole, Antarctica. Antarctic Science, 24 (4). pp. 417-425. ISSN 0954-1020. doi:10.1017/S0954102012000144. https://resolver.caltech.edu/CaltechAUTHORS:20120912-093539606 <https://resolver.caltech.edu/CaltechAUTHORS:20120912-093539606> |
op_rights |
other |
op_doi |
https://doi.org/10.1017/S0954102012000144 |
container_title |
Antarctic Science |
container_volume |
24 |
container_issue |
4 |
container_start_page |
417 |
op_container_end_page |
425 |
_version_ |
1766092189945823232 |