NOypartitioning from measurements of nitrogen and hydrogen radicals in the upper troposphere

Autor:	Eric J. Hintsa, E. R. Keim, James C. Wilson, Elliot Atlas, R. S. Gao, Michael H. Proffitt, J. J. Margitan, S. G. Donnelly, Thomas F. Hanisco, Frank Flocke, L. A. Del Negro, Ross J. Salawitch, C. T. McElroy, D. C. Scott, R. C. Wamsley, T. P. Bui, C. R. Webster, E. J. Lanzendorf, Lyatt Jaeglé, R. D. May, Stuart A. McKeen, David W. Fahey
Rok vydání:	1999
Předmět:	Peroxyacetyl nitrate Ozone Meteorology Analytical chemistry chemistry.chemical_element Nitrogen Troposphere chemistry.chemical_compound Geophysics chemistry Acetone General Earth and Planetary Sciences Nitrogen dioxide Nitrogen oxide NOx
Zdroj:	Geophysical Research Letters. 26:51-54
ISSN:	0094-8276
Popis:	Recent studies using NO, NOy, OH and HO2 (HOx) observations have postulated acetone and convection of peroxides as significant sources of HOx in the upper troposphere (UT). This work focuses on the effect these additional HOx sources have on the modeled NOy partitioning and comparisons of the modeled NOx/NOy ratio to observations. The measured NOx/NOy ratio is usually much higher than predicted regardless of the presence of acetone in the model. The exception occurs for air parcels having low NOy and O3 values. For these air parcels the measured NOx/NOy ratio is much lower than the calculated ratio unless acetone is included in the model. In all cases acetone increases the fraction of NOy that is peroxy acetyl nitrate (PAN) from typical values of much less than 0.1 to values as high as 0.35. Including acetone also reduces the scatter in a comparison between modeled and observed NOx/NOy ratios.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::bb8ebb4242605c2197ea3d1738199026 https://doi.org/10.1029/1998gl900219 Zobrazit plný text záznamu Plný text