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| Titel |
Sensitivity of stratospheric Bry to uncertainties in very short lived substance emissions and atmospheric transport |
| VerfasserIn |
R. Schofield, S. Fueglistaler, I. Wohltmann, M. Rex |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 11, no. 4 ; Nr. 11, no. 4 (2011-02-16), S.1379-1392 |
| Datensatznummer |
250009354
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| Publikation (Nr.) |
 copernicus.org/acp-11-1379-2011.pdf |
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| Zusammenfassung |
| We evaluate the sensitivity of Bry 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 Bry (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 Bry at 400 K – altering
the delivered Bry 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. |
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