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| Titel |
Transport of very short-lived substances into the tropical upper troposphere and lower stratosphere: A modeling study |
| VerfasserIn |
Jan Aschmann, Björn-Martin Sinnhuber |
| Konferenz |
EGU General Assembly 2010
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 12 (2010) |
| Datensatznummer |
250039973
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| Zusammenfassung |
| The transport of very short-lived substances (VSLS) into the tropical upper troposphere and
lower stratosphere (UTLS) is investigated by a three-dimensional chemical transport
model using archived convective updraft mass fluxes from the European Centre for
Medium-Range Weather Forecast’s ERA-Interim reanalysis. Large-scale vertical velocities
are calculated from diabatic heating rates. With this approach we explicitly model the
large scale subsidence in the tropical troposphere with convection taking place
in fast and isolated updraft events. The model calculations agree generally well
with observations of bromoform and methyl iodide from aircraft campaigns and
with ozone and water vapor from sonde and satellite observations. We furthermore
analyze the long-term transport of VSLS into the UTLS and its dependencies on
regional emissions and convective activity over the whole ERA-Interim period. |
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