Advanced chemical mechanisms for acid deposition modeling

Conference · Thu Jan 01 04:00:00 EST 1987 · Proceedings, Annual Meeting, Air Pollution Control Association; (USA)

OSTI ID:5104659

Stockwell, W R ^[1]; Tang, X ^[2]

---

1. State Univ. of New York, Albany, NY (USA)
2. Beijing Univ., BJ (China)

Atmospheric chemistry is of concern to both policy-makers and scientists because atmospheric transformation rates determine the extent to which reductions in the emissions of sulfur and nitrogen oxides will in fact reduce acid deposition. Policy decisions should be based upon solid science, thus a chemical mechanism for a regional acid deposition model must incorporate all significant chemical reactions. The gas-phase chemical mechanism affects the distribution, chemical form and concentration of potentially harmful chemical species because transport lifetimes depend on the chemical form of the trace species; the correct chemical form can be predicted only if a realistic chemical mechanism is employed; and gas-phase chemistry supplies all of the important reactants to cloud water, where the sulfur dioxide conversion rates can be very high. Although a scientifically sound chemical mechanism for a regional acid deposition model (RADM) should include as many details of atmospheric chemistry as possible, the mechanism must be simple by comparison with the very complex chemistry of the real atmosphere. The authors discuss how techniques such as the use of surrogate species or lumping must be used to simplify the organic chemistry in a chemical mechanism to be used in a complex atmospheric transport/transformation model so that the model will only require reasonable computational resources.

• OSTI ID: 5104659
• Report Number(s): CONF-870695--
• Conference Information: Journal Name: Proceedings, Annual Meeting, Air Pollution Control Association; (USA) Journal Volume: 4
• Country of Publication: United States
• Language: English

Related Subjects

29 ENERGY PLANNING, POLICY, AND ECONOMY
290300 -- Energy Planning & Policy-- Environment
Health
& Safety
54 ENVIRONMENTAL SCIENCES
540110
540120* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
ACID RAIN
AIR POLLUTION CONTROL
AIR POLLUTION MONITORING
ATMOSPHERIC CHEMISTRY
ATMOSPHERIC PRECIPITATIONS
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISTRY
CLOUDS
COMPUTER CALCULATIONS
CONTROL
DECISION MAKING
ENVIRONMENT
ENVIRONMENTAL POLICY
FLUIDS
GASES
GOVERNMENT POLICIES
HYDROGEN COMPOUNDS
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
PHASE STUDIES
POLLUTION CONTROL
POLLUTION SOURCES
RAIN
RAIN WATER
SAFETY
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
WATER