EOS Microwave Limb Sounder observations of upper stratospheric BrO: Implications for total bromine

Details EOS Microwave Limb Sounder observations of upper stratospheric BrO: Implications for total bromine EOS Microwave Limb Sounder observations of upper stratospheric BrO: Implications for total bromine

Oct 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006georl..3320817l&link_type=abstract

Geophysical Research Letters, Volume 33, Issue 20, CiteID L20817

Computer Science

Sound

7

Atmospheric Composition And Structure: Middle Atmosphere: Composition And Chemistry, Atmospheric Composition And Structure: Instruments And Techniques, Atmospheric Composition And Structure: Constituent Sources And Sinks

Scientific paper

This paper describes new total stratospheric inorganic bromine (Bry) abundance estimates inferred from the first global observations of upper stratospheric BrO, made by the EOS Microwave Limb Sounder on the Aura satellite. Our `best estimate' of total upper stratospheric bromine loading (based on JPL-2002 kinetics with the addition of a BrONO2 + O reaction) is 18.6 +/- 5.5 pptv, for the period September 2004 to August 2005, from 55° S to 55° N. This implies a contribution of 3.0 +/- 5.5 pptv from sources other than long lived CH3Br and halons. The possibility of such other sources has been raised by balloon, aircraft and satellite observations of BrO in the lower and middle stratosphere. These upper stratospheric observations provide new information to help resolve the current uncertainty in stratospheric bromine loading. The abundance of bromine, particularly in the lower stratosphere, is a significant factor in the budget of stratospheric O3.

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