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| Titel |
Modelling deep convection and its impacts on the tropical tropopause layer |
| VerfasserIn |
J. S. Hosking, M. R. Russo, P. Braesicke, J. A. Pyle |
| 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 ; 10, no. 22 ; Nr. 10, no. 22 (2010-11-26), S.11175-11188 |
| Datensatznummer |
250008915
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| Publikation (Nr.) |
 copernicus.org/acp-10-11175-2010.pdf |
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| Zusammenfassung |
| The UK Met Office's Unified Model is used at a climate resolution (N216,
~0.83°×~0.56°, ~60 km) to assess
the impact of deep tropical convection on the structure of the tropical
tropopause layer (TTL). We focus on the potential for rapid transport of
short-lived ozone depleting species to the stratosphere by rapid convective
uplift. The modelled horizontal structure of organised convection is shown to
match closely with signatures found in the OLR satellite data. In the model,
deep convective elevators rapidly lift air from 4–5 km up to 12–14 km.
The influx of tropospheric air entering the TTL (11–12 km) is similar for
all tropical regions with most convection stopping below ~14 km. The
tropical tropopause is coldest and driest between November and February,
coinciding with the greatest upwelling over the tropical warm pool. As this
deep convection is co-located with bromine-rich biogenic coastal emissions,
this period and location could potentially be the preferential gateway for
stratospheric bromine. |
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