Quantitative constraints on the atmospheric chemistry of nitrogen oxides: An analysis along chemical coordinates
In situ observations Of NO_2, NO, NO_y, ClONO_2, OH, O_3, aerosol surface area, spectrally resolved solar radiation, pressure and temperature obtained from the ER-2 aircraft during the Photochemistry of Ozone Loss in the Arctic Region in Summer (POLARIS) experiments are used to examine the factors c...
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ftcaltechauth:oai:authors.library.caltech.edu:46462 2023-05-15T15:16:51+02:00 Quantitative constraints on the atmospheric chemistry of nitrogen oxides: An analysis along chemical coordinates Cohen, R. C. Perkins, K. K. Koch, L. C. Stimpfle, R. M. Wennberg, P. O. Hanisco, T. F. Lanzendorf, E. J. Bonne, G. P. Voss, P. B. Salawitch, R. J. Del Negro, L. A. Wilson, J. C. McElroy, C. T. Bui, T. P. 2000-10-16 application/pdf https://authors.library.caltech.edu/46462/ https://authors.library.caltech.edu/46462/1/jgrd7650.pdf https://resolver.caltech.edu/CaltechAUTHORS:20140624-094548081 en eng American Geophysical Union https://authors.library.caltech.edu/46462/1/jgrd7650.pdf Cohen, R. C. and Perkins, K. K. and Koch, L. C. and Stimpfle, R. M. and Wennberg, P. O. and Hanisco, T. F. and Lanzendorf, E. J. and Bonne, G. P. and Voss, P. B. and Salawitch, R. J. and Del Negro, L. A. and Wilson, J. C. and McElroy, C. T. and Bui, T. P. (2000) Quantitative constraints on the atmospheric chemistry of nitrogen oxides: An analysis along chemical coordinates. Journal of Geophysical Research D, 105 (D19). pp. 24283-24304. ISSN 0148-0227. doi:10.1029/2000JD900290. https://resolver.caltech.edu/CaltechAUTHORS:20140624-094548081 <https://resolver.caltech.edu/CaltechAUTHORS:20140624-094548081> other Article PeerReviewed 2000 ftcaltechauth https://doi.org/10.1029/2000JD900290 2021-11-11T18:58:17Z In situ observations Of NO_2, NO, NO_y, ClONO_2, OH, O_3, aerosol surface area, spectrally resolved solar radiation, pressure and temperature obtained from the ER-2 aircraft during the Photochemistry of Ozone Loss in the Arctic Region in Summer (POLARIS) experiments are used to examine the factors controlling the fast photochemistry connecting NO and NO_2 and the slower chemistry connecting NO_x and HNO_3. Our analysis uses “chemical coordinates” to examine gradients of the difference between a model and precisely calibrated measurements to provide a quantitative assessment of the accuracy of current photochemical models. The NO/NO_2 analysis suggests that reducing the activation energy for the NO+O_3 reaction by 1.7 kJ/mol will improve model representation of the temperature dependence of the NO/NO_2 ratio in the range 215–235 K. The NO_x/HNO_3 analysis shows that systematic errors in the relative rate coefficients used to describe NO_x loss by the reaction OH + NO_2 → HNO_3 and by the reaction set NO_2 + O_3 → NO_3; NO_2 + NO_3 → N_(2)O_5; N_(2)O_5 + H_(2)O → 2HNO_3 are in error by +8.4% (+30/−45%) (OH+NO_2 too fast) in models using the Jet Propulsion Laboratory 1997 recommendations [DeMore et al., 1997]. Models that use recommendations for OH+NO2 and OH+HNO_3 based on reanalysis of recent and past laboratory measurements are in error by 1.2% (+30/−45%) (OH+NO_2 too slow). The +30%/−45% error limit reflects systematic uncertainties, while the statistical uncertainty is 0.65%. This analysis also shows that the POLARIS observations only modestly constrain the relative rates of the major NO_x production reactions HNO3 + OH → H_(2)O + NO_3 and HNO_3 + hν → OH + NO_2. Even under the assumption that all other aspects of the model are perfect, the POLARIS observations only constrain the rate coefficient for OH+HNO_3 to a range of 65% around the currently recommended value. Article in Journal/Newspaper Arctic Caltech Authors (California Institute of Technology) Arctic Journal of Geophysical Research: Atmospheres 105 D19 24283 24304 |
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Caltech Authors (California Institute of Technology) |
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language |
English |
description |
In situ observations Of NO_2, NO, NO_y, ClONO_2, OH, O_3, aerosol surface area, spectrally resolved solar radiation, pressure and temperature obtained from the ER-2 aircraft during the Photochemistry of Ozone Loss in the Arctic Region in Summer (POLARIS) experiments are used to examine the factors controlling the fast photochemistry connecting NO and NO_2 and the slower chemistry connecting NO_x and HNO_3. Our analysis uses “chemical coordinates” to examine gradients of the difference between a model and precisely calibrated measurements to provide a quantitative assessment of the accuracy of current photochemical models. The NO/NO_2 analysis suggests that reducing the activation energy for the NO+O_3 reaction by 1.7 kJ/mol will improve model representation of the temperature dependence of the NO/NO_2 ratio in the range 215–235 K. The NO_x/HNO_3 analysis shows that systematic errors in the relative rate coefficients used to describe NO_x loss by the reaction OH + NO_2 → HNO_3 and by the reaction set NO_2 + O_3 → NO_3; NO_2 + NO_3 → N_(2)O_5; N_(2)O_5 + H_(2)O → 2HNO_3 are in error by +8.4% (+30/−45%) (OH+NO_2 too fast) in models using the Jet Propulsion Laboratory 1997 recommendations [DeMore et al., 1997]. Models that use recommendations for OH+NO2 and OH+HNO_3 based on reanalysis of recent and past laboratory measurements are in error by 1.2% (+30/−45%) (OH+NO_2 too slow). The +30%/−45% error limit reflects systematic uncertainties, while the statistical uncertainty is 0.65%. This analysis also shows that the POLARIS observations only modestly constrain the relative rates of the major NO_x production reactions HNO3 + OH → H_(2)O + NO_3 and HNO_3 + hν → OH + NO_2. Even under the assumption that all other aspects of the model are perfect, the POLARIS observations only constrain the rate coefficient for OH+HNO_3 to a range of 65% around the currently recommended value. |
format |
Article in Journal/Newspaper |
author |
Cohen, R. C. Perkins, K. K. Koch, L. C. Stimpfle, R. M. Wennberg, P. O. Hanisco, T. F. Lanzendorf, E. J. Bonne, G. P. Voss, P. B. Salawitch, R. J. Del Negro, L. A. Wilson, J. C. McElroy, C. T. Bui, T. P. |
spellingShingle |
Cohen, R. C. Perkins, K. K. Koch, L. C. Stimpfle, R. M. Wennberg, P. O. Hanisco, T. F. Lanzendorf, E. J. Bonne, G. P. Voss, P. B. Salawitch, R. J. Del Negro, L. A. Wilson, J. C. McElroy, C. T. Bui, T. P. Quantitative constraints on the atmospheric chemistry of nitrogen oxides: An analysis along chemical coordinates |
author_facet |
Cohen, R. C. Perkins, K. K. Koch, L. C. Stimpfle, R. M. Wennberg, P. O. Hanisco, T. F. Lanzendorf, E. J. Bonne, G. P. Voss, P. B. Salawitch, R. J. Del Negro, L. A. Wilson, J. C. McElroy, C. T. Bui, T. P. |
author_sort |
Cohen, R. C. |
title |
Quantitative constraints on the atmospheric chemistry of nitrogen oxides: An analysis along chemical coordinates |
title_short |
Quantitative constraints on the atmospheric chemistry of nitrogen oxides: An analysis along chemical coordinates |
title_full |
Quantitative constraints on the atmospheric chemistry of nitrogen oxides: An analysis along chemical coordinates |
title_fullStr |
Quantitative constraints on the atmospheric chemistry of nitrogen oxides: An analysis along chemical coordinates |
title_full_unstemmed |
Quantitative constraints on the atmospheric chemistry of nitrogen oxides: An analysis along chemical coordinates |
title_sort |
quantitative constraints on the atmospheric chemistry of nitrogen oxides: an analysis along chemical coordinates |
publisher |
American Geophysical Union |
publishDate |
2000 |
url |
https://authors.library.caltech.edu/46462/ https://authors.library.caltech.edu/46462/1/jgrd7650.pdf https://resolver.caltech.edu/CaltechAUTHORS:20140624-094548081 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
https://authors.library.caltech.edu/46462/1/jgrd7650.pdf Cohen, R. C. and Perkins, K. K. and Koch, L. C. and Stimpfle, R. M. and Wennberg, P. O. and Hanisco, T. F. and Lanzendorf, E. J. and Bonne, G. P. and Voss, P. B. and Salawitch, R. J. and Del Negro, L. A. and Wilson, J. C. and McElroy, C. T. and Bui, T. P. (2000) Quantitative constraints on the atmospheric chemistry of nitrogen oxides: An analysis along chemical coordinates. Journal of Geophysical Research D, 105 (D19). pp. 24283-24304. ISSN 0148-0227. doi:10.1029/2000JD900290. https://resolver.caltech.edu/CaltechAUTHORS:20140624-094548081 <https://resolver.caltech.edu/CaltechAUTHORS:20140624-094548081> |
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other |
op_doi |
https://doi.org/10.1029/2000JD900290 |
container_title |
Journal of Geophysical Research: Atmospheres |
container_volume |
105 |
container_issue |
D19 |
container_start_page |
24283 |
op_container_end_page |
24304 |
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1766347136303104000 |