Accession Number:

ADA551353

Title:

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

Descriptive Note:

Annual rept.

Corporate Author:

MIAMI UNIV FL ROSENSTIEL SCHOOL OF MARINE AND ATMOSPHERIC SCIENCE

Personal Author(s):

• Hynes, Anthony J.

Report Date:

1998-01-01

Pagination or Media Count:

5.0

Abstract:

Dimethylsulfide DMS or CH3SCH3 produced by phytoplankton emission is thought to be the major source of the sulfate and methanesulfonate aerosols 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 product yields from, the OH initiated gas phase oxidation of dimethylsulfide. Our objectives are as follows 1 the determination of the elementary rates for adduct formation, decomposition, and reaction 2 direct confirmation of production and quantitative product yields of potential reaction products and intermediates, such as sulfur dioxide SO2 and dimethyl sulfoxide CH32SO, and 3 determination of the homogeneous and heterogeneous removal rates of the stable primary products of DMS oxidation.

Descriptors:

• *AEROSOLS
• *BOUNDARY LAYER
• *EMISSION
• *MARINE ATMOSPHERES
• *OXIDATION
• *PHYTOPLANKTON
• *SULFUR COMPOUNDS
• CHEMICAL REACTIONS
• DECOMPOSITION
• KINETICS
• LASER INDUCED FLUORESCENCE
• PHOTOLYSIS
• SULFONATES
• VISIBILITY
• YIELD

Subject Categories:

• Meteorology
• Inorganic Chemistry
• Organic Chemistry
• Physical Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE