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Impact of heterogeneous BrONO 2 hydrolysis on ozone trends and transient ozone loss during volcanic periods
Author(s) -
Randeniya L. K.,
Vohralik P. F.,
Plumb I. C.,
Ryan K. R.,
Baughcum S. L.
Publication year - 1996
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 - 10.1029/96gl01435
Subject(s) - ozone , atmospheric sciences , atmosphere (unit) , hydrolysis , environmental science , ozone depletion , aerosol , climatology , volcano , stratosphere , meteorology , chemistry , geology , physics , organic chemistry , seismology
The hydrolysis of BrONO 2 on sulphate aerosols has been included in a 2‐D model calculation of ozone changes over the period 1980–1995. Inclusion of this reaction has only a marginal impact on the calculated ozone trends between 1980 and 1990. The effect of the reaction on an atmosphere which has been heavily perturbed by sulphate aerosols for the period June 1991–1995 has been examined by using the idealised WMO 1995 scenario. The results show that the addition of this reaction has a major impact on the calculated transient ozone loss under enhanced aerosol conditions and approximately doubles the calculated ozone loss between 60°S and 60°N in 1992 (when maximum loss of ozone occurs). In contrast to the effects of the hydrolysis of N 2 O 5 , the effects of the hydrolysis of BrONO 2 are most marked at high latitudes in summer.