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The effect of clouds on photolysis rates and ozone formation in the unpolluted troposphereThe photochemistry of the lower atmosphere is sensitive to short- and long-term meteorological effects; accurate modeling therefore requires photolysis rates for trace gases which reflect this variability. As an example, the influence of clouds on the production of tropospheric ozone has been investigated, using a modification of Luther's two-stream radiation scheme to calculate cloud-perturbed photolysis rates in a one-dimensional photochemical transport model. In the unpolluted troposphere, where stratospheric inputs of odd nitrogen appear to represent the photochemical source of O3, strong cloud reflectance increases the concentration of NO in the upper troposphere, leading to greatly enhanced rates of ozone formation. Although the rate of these processes is too slow to verify by observation, the calculation is useful in distinguishing some features of the chemistry of regions of differing mean cloudiness.
Document ID
19840040378
Document Type
Reprint (Version printed in journal)
Authors
Thompson, A. M. (Natonal Center for Atmospheric Research Boulder, CO, United States)
Date Acquired
August 12, 2013
Publication Date
February 20, 1984
Publication Information
Publication: Journal of Geophysical Research
Volume: 89
ISSN: 0148-0227
Subject Category
GEOPHYSICS
Funding Number(s)
CONTRACT_GRANT: NSF ATM-79-23774
CONTRACT_GRANT: NAGW-45
CONTRACT_GRANT: NSF ATM-78-26728
Distribution Limits
Public
Copyright
Other