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Photochemical oxidant processes in the presence of dust: An evaluation of the impact of dust on particulate nitrate and ozone formationThe influence of dust on the tropospheric photochemical oxidant cycle is studied through the use of a detailed coupled aerosol and gas-phase chemistry model. Dust is a significant component of the troposphere throughout Asia and provides a surface for a variety of heterogeneous reactions. Dust is found to be an important surface for particulate nitrate formation. For dust loading and ambient concentrations representative of conditions in East Asia, particulate nitrate levels of 1.5-11.5 micrograms/cubic meter are predicted, consistent with measured levels in this region. Dust is also found to reduce NO(x) levels by up to 50%, HO2 concentrations by 20%-80%, and ozone production rates by up to 25%. The magnitude of the influence of dust is sensitive to mass concentration of the aerosol, relative humidity, and the value of the accommodation coefficient.
Document ID
19950031793
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Zhang, Yang
(Univ. of Iowa, Iowa City, IA US, United States)
Sunwoo, Young
(Univ. of Iowa, Iowa City, IA US, United States)
Kotamarthi, Veerabhadra
(Univ. of Iowa, Iowa City, IA US, United States)
Carmichael, Gregory R.
(Univ. of Iowa, Iowa City, IA US, United States)
Date Acquired
August 16, 2013
Publication Date
July 1, 1994
Publication Information
Publication: Journal of Applied Meteorology
Volume: 33
Issue: 7
ISSN: 0894-8763
Subject Category
Environment Pollution
Accession Number
95A63392
Funding Number(s)
CONTRACT_GRANT: NAGW-2428
Distribution Limits
Public
Copyright
Other

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