Kinetics, Mechanism and Product Yields in the Atmospheric Oxidation of Dimethylsulfide

Abstract

Dimethylsulfide (DMS, CH3SCH3) produced by phytoplankton emission is thought to be the major source of the sulfate and methanesulfonate aerosol found in the marine boundary layer. An understanding of the mechanism of formation of these aerosols is critical to understanding the factors which control visibility in the marine boundary layer. The primary objective of this research effort is the determination of the detailed mechanism of, and final products yields from, the OH initiated gas phase oxidation of dimethylsulfide (DMS). Our objectives include the determination of a) the effective rate coefficients for the OH initiated oxidation of DMS under atmospheric conditions, b) the elementary rates for adduct formation, decomposition and reaction, b) direct confirmation of production, and quantitative product yields of potential reaction products and intermediates such sulfur dioxide (SO2) and dimethyl sulfoxide (DMSO: (CH3)2SO).

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Document Details

Document Type
Technical Report
Publication Date
Sep 30, 2000
Accession Number
ADA609849

Entities

People

  • Anthony J. Hynes

Organizations

  • Rosenstiel School of Marine, Atmospheric, and Earth Science

Tags

DTIC Thesaurus Topics

  • Atmospheric Chemistry
  • Atmospheric Sciences
  • Boundaries
  • Boundary Layer
  • Chemical Reaction Properties
  • Chemical Reactions
  • Chemistry
  • Coefficients
  • Kinetics
  • Laser Induced Fluorescence
  • Lasers
  • Low Temperature
  • Oxidation
  • Partial Pressure
  • Photolysis
  • Physical Chemistry
  • Sulfur Compounds

Fields of Study

  • Environmental science

Readers

  • Marine Ecotoxicology
  • Organic Chemistry