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Sensitivity of ozone to bromine in the lower stratosphere

Show simple item record Salawitch, R. J. Weisenstein, D. K. Kovalenko, L. J. Sioris, C. E. Wennberg, P. O. Chance, K. Ko, M. K. W. McLinden, C. A. 2007-02-06T23:59:49Z 2007-02-06T23:59:49Z 2005-03-09
dc.identifier.citation Geophysical Research Letters, VOL. 32, L05811, doi:10.1029/2004GL021504, 2005 en
dc.identifier.clearanceno 04-2935
dc.description.abstract Measurements of BrO suggest that inorganic bromine (Bry) at and above the tropopause is 4 to 8 ppt greater than assumed in models used in past ozone trend assessment studies. This additional bromine is likely carried to the stratosphere by short-lived biogenic compounds and their decomposition products, including tropospheric BrO. Including this additional bromine in an ozone trend simulation increases the computed ozone depletion over the past ~25 years, leading to better agreement between measured and modeled ozone trends. This additional Bry (assumed constant over time) causes more ozone depletion because associated BrO provides a reaction partner for ClO, which increases due to anthropogenic sources. Enhanced Bry causes photochemical loss of ozone below ~14 km to change from being controlled by HOx catalytic cycles (primarily HO2+O3) to a situation where loss by the BrO+HO2 cycle is also important. en
dc.description.sponsorship NASA/JPL en
dc.format.extent 388076 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US en
dc.publisher The American Geophysical Union en
dc.subject ozone trends en
dc.subject inorganic bromine en
dc.title Sensitivity of ozone to bromine in the lower stratosphere en
dc.type Preprint en

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