Sensitivity of stratospheric Bry to uncertainties in very short lived substance emissions and atmospheric transport
Item
Title (Dublin Core)
Sensitivity of stratospheric Bry to uncertainties in very short lived substance emissions and atmospheric transport
Description (Dublin Core)
We evaluate the sensitivity of Br<sub>y</sub> entering the stratosphere with a simplified model that allows calculations over a wide parameter range for parameters that are currently poorly quantified. The model examines the transport process uncertainties in the source concentrations and lifetimes, in the convective parameterization and in the inorganic bromine washout process due to dehydration. Source concentrations at the surface and lifetimes were found to have a slight effect on the resultant Br<sub>y</sub> (1 ppt), however this was highly dependent upon, with increasing significance, the BL component of convectively delivered air. Efficiency of convective delivery of boundary layer (BL) air to the tropical tropopause layer (TTL) along with washout at the CPT were found to substantially affect Br<sub>y</sub> at 400 K – altering the delivered Br<sub>y</sub> by 3.3 ppt and 2.9 ppt, respectively. We find that the results critically depend on free tropospheric bromine source gas concentrations due to dilution of convective updrafts, and the processes that control free tropospheric bromine source gas concentrations require further attention.
Creator (Dublin Core)
Schofield, R.
Fueglistaler, S.
Wohltmann, I.
Rex, M.
Date (Dublin Core)
2018-01-15
Type (Dublin Core)
info:eu-repo/semantics/Text
Format (Dublin Core)
info:eu-repo/semantics/application/pdf
Identifier (Dublin Core)
10.5194/acp-11-1379-2011
https://acp.copernicus.org/articles/11/1379/2011/
Source (Dublin Core)
eISSN: 1680-7324
Language (Dublin Core)
eng
Relation (Dublin Core)
info:eu-repo/grantAgreement/EC/FP7/226224
Rights (Dublin Core)
info:eu-repo/semantics/openAccess
