Nighttime OClO in the winter Arctic vortex
We show that a nighttime profile of OClO in the Arctic vortex during the winter of 2000 is overestimated, by nearly a factor of 2, using an isentropic trajectory model constrained by observed profiles of ClOx (ClO + 2 X ClOOCl) and BrO. Calculated abundances of nighttime OClO are shown to be sensiti...
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ftnasajpl:oai:trs.jpl.nasa.gov:2014/40921 2023-05-15T14:51:33+02:00 Nighttime OClO in the winter Arctic vortex Canty, T. Riviere, E. D. Salawitch, R. J. Berthet, G. Renard, J.-B. Pfeilsticker, K. Dorf, M. Butz, A. Bosch, H. Stimpfle, R. M. Wilmouth, D. M. Richard, E. C. Fahey, D. W. Popp, P. J. Schoeberl, M. R. Lait, L. R. Bui, T. P. 2008-08-18T22:36:38Z application/pdf http://hdl.handle.net/2014/40921 en_US eng the American Geophysical Union Journal Of Geophysical Research, Vol. 110, D01301, doi:10.1029/2004JD005035, 2005 04-2728 http://hdl.handle.net/2014/40921 Arctic vortex ozone depletion chlorine activation Article 2008 ftnasajpl https://doi.org/10.1029/2004JD005035 2021-12-23T13:19:59Z We show that a nighttime profile of OClO in the Arctic vortex during the winter of 2000 is overestimated, by nearly a factor of 2, using an isentropic trajectory model constrained by observed profiles of ClOx (ClO + 2 X ClOOCl) and BrO. Calculated abundances of nighttime OClO are shown to be sensitive to the abundance of BrOx (BrO + BrCl), details of the air parcel history during the most recent sunrise/sunset transitions, and the BrCl yield from the reaction BrO + ClO. Many uncertainties are considered, and the discrepancy between measured and modeled nighttime OClO appears to be robust. This discrepancy suggests that production of OClO occurs more slowly than implied by standard photochemistry. If the yield of BrCl from the reaction of BrO + ClO is increased from 7% (JPL 2002 value) to 11% (near the upper limit of the uncertainty), good agreement is found between measured and modeled nighttime OClO. This study highlights the importance of accurate knowledge of BrO + ClO reaction kinetics as well as air parcel trajectories for proper interpretation of nighttime OClO. These factors have a considerably smaller impact on the interpretation of OClO observations obtained during twilight (90° ≤SZA ≤ 92°), when photolytic processes are still active. NASA/JPL Article in Journal/Newspaper Arctic JPL Technical Report Server Arctic Journal of Geophysical Research 110 D1 |
institution |
Open Polar |
collection |
JPL Technical Report Server |
op_collection_id |
ftnasajpl |
language |
English |
topic |
Arctic vortex ozone depletion chlorine activation |
spellingShingle |
Arctic vortex ozone depletion chlorine activation Canty, T. Riviere, E. D. Salawitch, R. J. Berthet, G. Renard, J.-B. Pfeilsticker, K. Dorf, M. Butz, A. Bosch, H. Stimpfle, R. M. Wilmouth, D. M. Richard, E. C. Fahey, D. W. Popp, P. J. Schoeberl, M. R. Lait, L. R. Bui, T. P. Nighttime OClO in the winter Arctic vortex |
topic_facet |
Arctic vortex ozone depletion chlorine activation |
description |
We show that a nighttime profile of OClO in the Arctic vortex during the winter of 2000 is overestimated, by nearly a factor of 2, using an isentropic trajectory model constrained by observed profiles of ClOx (ClO + 2 X ClOOCl) and BrO. Calculated abundances of nighttime OClO are shown to be sensitive to the abundance of BrOx (BrO + BrCl), details of the air parcel history during the most recent sunrise/sunset transitions, and the BrCl yield from the reaction BrO + ClO. Many uncertainties are considered, and the discrepancy between measured and modeled nighttime OClO appears to be robust. This discrepancy suggests that production of OClO occurs more slowly than implied by standard photochemistry. If the yield of BrCl from the reaction of BrO + ClO is increased from 7% (JPL 2002 value) to 11% (near the upper limit of the uncertainty), good agreement is found between measured and modeled nighttime OClO. This study highlights the importance of accurate knowledge of BrO + ClO reaction kinetics as well as air parcel trajectories for proper interpretation of nighttime OClO. These factors have a considerably smaller impact on the interpretation of OClO observations obtained during twilight (90° ≤SZA ≤ 92°), when photolytic processes are still active. NASA/JPL |
format |
Article in Journal/Newspaper |
author |
Canty, T. Riviere, E. D. Salawitch, R. J. Berthet, G. Renard, J.-B. Pfeilsticker, K. Dorf, M. Butz, A. Bosch, H. Stimpfle, R. M. Wilmouth, D. M. Richard, E. C. Fahey, D. W. Popp, P. J. Schoeberl, M. R. Lait, L. R. Bui, T. P. |
author_facet |
Canty, T. Riviere, E. D. Salawitch, R. J. Berthet, G. Renard, J.-B. Pfeilsticker, K. Dorf, M. Butz, A. Bosch, H. Stimpfle, R. M. Wilmouth, D. M. Richard, E. C. Fahey, D. W. Popp, P. J. Schoeberl, M. R. Lait, L. R. Bui, T. P. |
author_sort |
Canty, T. |
title |
Nighttime OClO in the winter Arctic vortex |
title_short |
Nighttime OClO in the winter Arctic vortex |
title_full |
Nighttime OClO in the winter Arctic vortex |
title_fullStr |
Nighttime OClO in the winter Arctic vortex |
title_full_unstemmed |
Nighttime OClO in the winter Arctic vortex |
title_sort |
nighttime oclo in the winter arctic vortex |
publisher |
the American Geophysical Union |
publishDate |
2008 |
url |
http://hdl.handle.net/2014/40921 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
Journal Of Geophysical Research, Vol. 110, D01301, doi:10.1029/2004JD005035, 2005 04-2728 http://hdl.handle.net/2014/40921 |
op_doi |
https://doi.org/10.1029/2004JD005035 |
container_title |
Journal of Geophysical Research |
container_volume |
110 |
container_issue |
D1 |
_version_ |
1766322693457575936 |