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The distribution of hydrogen, nitrogen, and chlorine radicals in the lower stratosphere: implications for changes in o3 due to emission of no(y) from supersonic aircraft
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Woodbridge, E. L. Gao, R. S. Brock, C. A. Wofsy, S. C. Gottlieb, E. W. Fahey, D. W. Kohn, D. W. May, R. D. Pfister, L. Stimpfle, R. M. Yue, G. K. Wennberg, P. O. Cohen, R. C. Salawitch, R. J. Webster, C. R. Michelsen, H. A. Koplow, P. Keim, E. R. Wilson, J. C. Anderson, J. G. |
| Copyright Year | 1994 |
| Description | In situ measurements of hydrogen, nitrogen, and chlorine radicals obtained in the lower stratosphere during the Stratospheric Photochemistry, Aerosols and Dynamics Expedition (SPADE) are compared to results from a photochemical model that assimilates measurements of radical precursors and environmental conditions. Models allowing for heterogeneous hydrolysis of N2O5 agree well with measured concentrations of NO and ClO, but concentrations of HO2 and OH are underestimated by 10 to 25%, concentrations of NO2 are overestimated by 10 to 30%, and concentrations of HCl are overestimated by a factor of 2. Discrepancies for [OH] and [HO2] are reduced if we allow for higher yields of O(sup 1)D) from 03 photolysis and for heterogeneous production of HNO2. The data suggest more efficient catalytic removal of O3 by hydrogen and halogen radicals relative to nitrogen oxide radicals than predicted by models using recommended rates and cross sections. Increases in [O3] in the lower stratosphere may be larger in response to inputs of NO(sub y) from supersonic aircraft than estimated by current assessment models. |
| File Size | 384566 |
| Page Count | 4 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19980007189 |
| Archival Resource Key | ark:/13960/t9v16zn17 |
| Language | English |
| Publisher Date | 1994-11-15 |
| Access Restriction | Open |
| Subject Keyword | Geophysics In Situ Measurement Photochemical Reactions Chlorine Hydrogen Atmospheric Models Stratosphere Ozone Nitrogen Radicals Atmospheric Composition Photolysis Hydroxyl Radicals Nitrogen Oxides Peroxides Chlorine Oxides Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
