Bromine in the tropical troposphere and stratosphere as derived from balloon-borne BrO observations
Item
Title (Dublin Core)
Bromine in the tropical troposphere and stratosphere as derived from balloon-borne BrO observations
Description (Dublin Core)
The first tropospheric and stratospheric (4 to 33 km) BrO profile is presented for the inner tropics derived from balloon-borne DOAS (Differential Optical Absorption Spectroscopy) measurements. In combination with photochemical modelling, total stratospheric inorganic bromine (Br<sub>y</sub>) is deduced to be (21.5±2.5) ppt in 4.5-year-old air, probed in 2005. We derive a total contribution of (5.2±2.5) ppt from brominated very short-lived substances and inorganic product gases to stratospheric Br<sub>y</sub> Tropospheric BrO was found to be <1 ppt. Our results are compared to two 3-D CTM SLIMCAT model runs, which differ in the lifetime of the bromine source gases, affecting the vertical distribution of Br<sub>y</sub> in the lower stratosphere. Bromine source gas measurements performed 10 days earlier Laube et al., 2008, indicate a lower Br<sub>y</sub> of (17.5±0.4) ppt. Potential reasons for this discrepancy are discussed.
Creator (Dublin Core)
Dorf, M.
Butz, A.
Camy-Peyret, C.
Chipperfield, M. P.
Kritten, L.
Pfeilsticker, K.
Date (Dublin Core)
2018-01-15
Type (Dublin Core)
Text
Format (Dublin Core)
application/pdf
Identifier (Dublin Core)
10.5194/acp-8-7265-2008
https://acp.copernicus.org/articles/8/7265/2008/
Source (Dublin Core)
eISSN: 1680-7324
Language (Dublin Core)
eng
