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Accommodation Coefficient of Hobr on Deliquescent Sodium Bromide Aerosol Particles : Volume 2, Issue 2 (06/06/2002)

By Wachsmuth, M.

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Book Id: WPLBN0003973976
Format Type: PDF Article :
File Size: Pages 11
Reproduction Date: 2015

Title: Accommodation Coefficient of Hobr on Deliquescent Sodium Bromide Aerosol Particles : Volume 2, Issue 2 (06/06/2002)  
Author: Wachsmuth, M.
Volume: Vol. 2, Issue 2
Language: English
Subject: Science, Atmospheric, Chemistry
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2002
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

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Ammann, M., Glasow, R. V., Gäggeler, H. W., & Wachsmuth, M. (2002). Accommodation Coefficient of Hobr on Deliquescent Sodium Bromide Aerosol Particles : Volume 2, Issue 2 (06/06/2002). Retrieved from http://community.ebooklibrary.org/


Description
Description: Paul Scherrer Institut, Laboratory for Radio- and Environmental Chemistry, Villigen, Switzerland. Uptake of HOBr on sea salt aerosol, sea salt brine or ice is believed to be a key process providing a source of photolabile bromine (Br2) and sustaining ozone depletion cycles in the Arctic troposphere. In the present study, uptake of HOBr on sodium bromide (NaBr) aerosol particles was investigated at an extremely low HOBr concentration of 300 cm-3 using the short-lived radioactive isotopes 83-86Br. Under these conditions, at maximum one HOBr molecule was taken up per particle. The rate of uptake was clearly limited by the mass accommodation coefficient, which was calculated to be 0.6 ± 0.2. This value is a factor of 10 larger than estimates used in earlier models. The atmospheric implications are discussed using the box model "MOCCA'', showing that the increase of the accommodation coefficient of HOBr by a factor of 10 only slightly affects net ozone loss, but significantly increases chlorine release.

Summary
Accommodation coefficient of HOBr on deliquescent sodium bromide aerosol particles

 

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