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Chemical mechanisms for the modeling of acid deposition

Conference · · Am. Chem. Soc., Div. Pet. Chem., Prepr.; (United States)
OSTI ID:5432415
; ; ; ;
An aqueous phase chemistry model has to consider several meteorological variables in addition to chemical species; these include vertical mixing of pollutants, removal through wet deposition, and cloud effects upon photolysis rates. Aqueous and gas phase chemistry mechanisms couple in a complex manner through the effect of clouds on photolysis rates and scavenging of gas phase radicals by droplets. The first versions of the NCAR Regional Acid Deposition Model (RADM) gas phase and aqueous phase chemical mechanisms are being compared with the more comprehensive mechanisms. In view of the high sensitivity of acid generation to the initial aromatic hydrocarbon content of atmospheric mixtures, the highest priority was given to the comparison of the HO, HO/sub 2/, H/sub 2/O/sub 2/ and acid concentrations produced by the condensed RADM gas phase aromatic chemistry model with those predicted by the comprehensive mechanism.
Research Organization:
National Center for Atmospheric Research, P.O. Box 3000, Boulder, CO 80307
OSTI ID:
5432415
Report Number(s):
CONF-860425-
Conference Information:
Journal Name: Am. Chem. Soc., Div. Pet. Chem., Prepr.; (United States) Journal Volume: 31:2
Country of Publication:
United States
Language:
English

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Related Subjects

500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ACID RAIN
AIR POLLUTION
AIR QUALITY
AQUEOUS SOLUTIONS
AROMATICS
ATMOSPHERIC CHEMISTRY
ATMOSPHERIC PRECIPITATIONS
CHALCOGENIDES
CHEMICAL REACTION KINETICS
CHEMICAL REACTION YIELD
CHEMISTRY
DISPERSIONS
ECOLOGICAL CONCENTRATION
ENVIRONMENTAL QUALITY
ENVIRONMENTAL TRANSPORT
FEDERAL REGION I
FEDERAL REGION II
HYDROGEN COMPOUNDS
HYDROGEN PEROXIDE
HYDROXYL RADICALS
INORGANIC ACIDS
KINETICS
MASS TRANSFER
MATHEMATICAL MODELS
MIXTURES
NITRIC ACID
NITROGEN COMPOUNDS
NITROGEN DIOXIDE
NITROGEN OXIDES
NORTH AMERICA
ORGANIC ACIDS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PEROXIDES
POLLUTION
RADICALS
RAIN
REACTION KINETICS
SEASONAL VARIATIONS
SOLUTIONS
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
SULFURIC ACID
USA
VARIATIONS
YIELDS