caa a22 4500 475823494 CHVBK 20180406123825.0 cr unu---uuuuu 170329e20001001xx s 000 0 eng 10.1023/A:1006429932403 doi (NATIONALLICENCE)springer-10.1023/A:1006429932403 A Study of DMS Oxidation in the Tropics: Comparison of Christmas Island Field Observations of DMS, SO2, and DMSO with Model Simulations [Elektronische Daten] [G. Chen, D. Davis, P. Kasibhatla, A. Bandy, D. Thornton, B. Huebert, A. Clarke, B. Blomquist] This study reports comparisonsbetween model simulations, based on current sulfurmechanisms, with the DMS, SO2 and DMSOobservational data reported by Bandy et al.(1996) in their 1994 Christmas Island field study. For both DMS and SO2, the model results werefound to be in excellent agreement with theobservations when the observations were filtered so asto establish a common meteorological environment. Thisfiltered DMS and SO2 data encompassedapproximately half of the total sampled days. Basedon these composite profiles, it was shown thatoxidation of DMS via OH was the dominant pathway withno more than 5 to 15% proceeding through Cl atoms andless than 3% through NO3. This analysis wasbased on an estimated DMS sea-to-air flux of 3.4 ×109 molecs cm-2 s-1. The dominant sourceof BL SO2 was oxidation of DMS, the overallconversion efficiency being evaluated at 0.65 ± 0.15. The major loss of SO2 was deposition to theocean's surface and scavenging by aerosol. Theresulting combined first order k value was estimated at 1.6 × 10-5 s-1. In contrast to the DMSand SO2 simulations, the model under-predictedthe observed DMSO levels by nearly a factor of 50. Although DMSO instrument measurement problems can notbe totally ruled out, the possibility of DMSO sourcesother than gas phase oxidation of DMS must beseriously considered and should be explored in futurestudies. Kluwer Academic Publishers, 2000 dimethyl sulfide nationallicence sulfur dioxide nationallicence DMS oxidation nationallicence SO2 nationallicence wet/dry deposition nationallicence Chen G. School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, U.S.A. aut Davis D. School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, U.S.A. aut Kasibhatla P. School of Environment, Duke University, Durham, North Carolina, U.S.A. aut Bandy A. Department of Chemistry, Drexel University, Philadelphia, Pennsylvania, U.S.A. aut Thornton D. Department of Chemistry, Drexel University, Philadelphia, Pennsylvania, U.S.A. aut Huebert B. Department of Oceanography, University of Hawaii, Honolulu, U.S.A. aut Clarke A. Department of Oceanography, University of Hawaii, Honolulu, U.S.A. aut Blomquist B. Department of Oceanography, University of Hawaii, Honolulu, U.S.A. aut Journal of Atmospheric Chemistry Kluwer Academic Publishers 37/2(2000-10-01), 137-160 0167-7764 37:2<137 2000 37 10874 https://doi.org/10.1023/A:1006429932403 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1006429932403 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Chen G. School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, U.S.A aut NATIONALLICENCE 700 1- Davis D. School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, U.S.A aut NATIONALLICENCE 700 1- Kasibhatla P. School of Environment, Duke University, Durham, North Carolina, U.S.A aut NATIONALLICENCE 700 1- Bandy A. Department of Chemistry, Drexel University, Philadelphia, Pennsylvania, U.S.A aut NATIONALLICENCE 700 1- Thornton D. Department of Chemistry, Drexel University, Philadelphia, Pennsylvania, U.S.A aut NATIONALLICENCE 700 1- Huebert B. Department of Oceanography, University of Hawaii, Honolulu, U.S.A aut NATIONALLICENCE 700 1- Clarke A. Department of Oceanography, University of Hawaii, Honolulu, U.S.A aut NATIONALLICENCE 700 1- Blomquist B. Department of Oceanography, University of Hawaii, Honolulu, U.S.A aut NATIONALLICENCE 773 0- Journal of Atmospheric Chemistry Kluwer Academic Publishers 37/2(2000-10-01), 137-160 0167-7764 37:2<137 2000 37 10874 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer