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A model study of the effects of intermittent loss on odd nitrogen concentrations in the lower troposphereA time-dependent box model of the lower troposphere which includes a description of photochemical and physical processes has been developed. This model has been applied to the calculation of nitric acid and NO(x)(NO + NO2) concentrations over a diurnal cycle which includes precipitation. Nitric acid concentrations and the HNO3/NO(x) ratio are found to be highly variable under the assumptions regarding the frequency, duration, and intensity of precipitation employed in this model. The chemistry of odd nitrogen compounds during the night is potentially important in establishing the level of nitric acid in the lower troposphere. These calculations also indicate that relatively large errors may occur when the continuity equation describing nitric acid variations is averaged over a diurnal cycle which includes precipitation. Interpretation of simultaneous measurements of HNO3 and NO(x) will require some knowledge of the history of the observed air mass and may require an improved understanding of nighttime odd nitrogen chemistry.
Document ID
Document Type
Reprint (Version printed in journal)
Stewart, R. W.
(NASA Goddard Space Flight Center Atmospheric Chemistry Branch, Greenbelt, MD, United States)
Hameed, S.
(New York, State University Stony Brook, NY, United States)
Matloff, G.
(Pratt Institute Brooklyn, NY, United States)
Date Acquired
August 12, 2013
Publication Date
December 20, 1983
Publication Information
Publication: Journal of Geophysical Research
Volume: 88
ISSN: 0148-0227
Subject Category
Distribution Limits
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