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The role of BrNO 3 in marine tropospheric chemistry: A model study
Author(s) -
Sander R.,
Rudich Y.,
von Glasow R.,
Crutzen P. J.
Publication year - 1999
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/1999gl900478
Subject(s) - bromine , sea salt , aerosol , bromide , chlorine , environmental chemistry , sulfuric acid , chemistry , sulfate , salt (chemistry) , gas phase , chloride , troposphere , nitrate , inorganic chemistry , geology , atmospheric sciences , organic chemistry
Laboratory studies have shown that bromine nitrate (BrNO 3 ) reacts on sulfuric acid and on ice particles. Here we investigate the potential role of BrNO 3 in the marine boundary layer (mbl) assuming that it reacts on sea‐salt particles as well. Using the chemical box model MOCCA we find that heterogeneous reactions of BrNO 3 on aerosol particles could affect the chemistry in four major ways: 1) They increase loss of NO x (=NO+NO 2 ) from the gas phase; 2) They accelerate loss of bromide and chloride from sea‐salt aerosols. This dehalogenation occurs without the consumption of aerosol acidity; 3) The resulting loss of NO x and the increase of gas‐phase bromine species both lead to O 3 destruction; 4) The resulting increase of reactive chlorine species affects gas‐phase hydrocarbons as well as S(IV) oxidation by HOCl in sea‐salt aerosols.

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