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Global Climate Change Digest
A Guide to Information on Greenhouse Gases and Ozone Depletion
Published July 1988 through June 1999

FROM VOLUME 5, NUMBER 9, SEPTEMBER 1992

PROFESSIONAL PUBLICATIONS...
SULFUR CYCLE, CLOUD NUCLEI

Item #d92sep65

Two items from J. Geophys. Res., 97(D9), June 20, 1992:

"Modeling a Case of Particle Nucleation in the Marine Boundary Layer," D.A. Hegg (Dept. Atmos. Sci., Univ. Washington, AK-40, Seattle WA 98195), D.S. Covert, V.N. Kapustin, 9851-9857. A three-mode integral nucleation model predicted particle concentrations in accord with observations when initialized with the appropriate field measurements. Further analysis elucidated conditions favorable for nucleation at the ocean surface.

"Variations in the Methanesulfonate to Sulfate Molar Ratio in Submicrometer Marine Aerosol Particles over the South Pacific Ocean," T.S. Bates (PMEL, NOAA, 7600 Sand Pt. Way NE, Seattle WA 98115), J.A. Calhoun, P.K. Quinn, 9859-9865. An inverse correlation was found between atmospheric temperature and the MSA to nss SO42-molar ratio in submicrometer aerosol particles, consistent with laboratory results, but contrary to Southern Hemisphere baseline station data. Implications are discussed.

Item #d92sep66

"Low Yields of SO2 from Dimethyl Sulfide Oxidation in the Marine Boundary Layer," A.R. Bandy (Chem. Dept., Drexel Univ., Philadelphia PA 19104), D.L. Scott et al., Geophys. Res. Lett., 19(11), 1125-1127, June 2, 1992. Low efficiency of conversion of DMS to SO2 is the most likely explanation for the low SO2 levels observed in the marine boundary layer off the coast of Washington state.

Item #d92sep67

Comment and reply on "Measurements of Aitken Nuclei and Cloud Condensation Nuclei in the Marine Atmosphere and Their Relation to the DMS-Cloud-Climate Hypothesis," J. Geophys. Res., 97(D7), 7657-7658, May 20, 1992.

Item #d92sep68

"Dynamics of Dimethyl Sulfide and Dimethylsulfonioproprionate in Oceanic Water Samples," R.P. Kiene (Univ. Georgia Marine Inst., Sapelo Island GA 31327), Marine Chem., 37(1-2), 29-52, Mar. 1992.

Measurements in incubated samples of surface seawater suggest an alternative pathway for DMSP metabolism which could limit the production of DMS. They also suggest a dynamic biological cycling of DMS in open waters, with significant rates of simultaneous production and consumption.

Item #d92sep69

"Infrared Absorption Spectra and Integrated Band Intensities for Gaseous Methanesulphonic Acid (MSA)," N. Mihalopoulos (Physik. Chemie, Fachbereich 9, Bergische Univ. Gesamthochschule Wuppertal, 5600 Wuppertal 1, Ger.), I. Barnes, K.H. Becker, Atmos. Environ., 26A(5), 807-812, 1992.