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  Modeling halogen chemistry in the marine boundary layer - 2. Interactions with sulfur and the cloud-covered MBL

von Glasow, R., Sander, R., Bott, A., & Crutzen, P. J. (2002). Modeling halogen chemistry in the marine boundary layer - 2. Interactions with sulfur and the cloud-covered MBL. Journal of Geophysical Research, 107(D17): 4323. doi:10.1029/2001JD000943.

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Genre: Journal Article
Alternative Title : J. Geophys. Res.

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 Creators:
von Glasow, R.1, Author           
Sander, R.1, Author           
Bott, A., Author
Crutzen, P. J.1, Author           
Affiliations:
1Atmospheric Chemistry, Max Planck Institute for Chemistry, Max Planck Society, ou_1826285              

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Free keywords: sea-salt aerosol; cloud chemistry; halogen chemistry; bromine; chlorine; sulfur-halogen interactions
 Abstract: A companion paper presented a numerical one-dimensional model of the marine boundary layer (MBL) including chemical reactions in the gas and aqueous phase, focusing on the reaction cycles of halogen compounds. In this paper we study interactions between halogen and sulfur chemistry. HOCl and HOBr were found to be generally more important than H(2)O(2)or O-3 in the oxidation of S(IV) in sea salt aerosols in the cloud-free MBL. The inclusion of halogen chemistry lead to an increase in the oxidation of DMS of roughly 63%. This additional oxidation is caused by BrO. The model was also expanded for the study of the cloudy MBL. We found that the effects of stratiform clouds on the evolution and diurnal cycle of halogen species are widespread; they are not restricted to cloud layers. The diurnal variation of gas and aqueous phase bromine was the opposite of that in cloud-free runs. Oxidation of S(IV) by HOBr and HOCl was important for cloud droplets, too. However, the relative importance of these oxidants changed compared to the cloud-free runs.

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Language(s): eng - English
 Dates: 2002-09
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: eDoc: 18294
ISI: 000180427200003
DOI: 10.1029/2001JD000943
 Degree: -

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Title: Journal of Geophysical Research
  Alternative Title : J. Geophys. Res.
Source Genre: Journal
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Publ. Info: -
Pages: - Volume / Issue: 107 (D17) Sequence Number: 4323 Start / End Page: - Identifier: ISSN: 0747-7309