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| Titel |
Investigation of mesoscale trace gas distributions across an Arctic tropopause fold affected by gravity wave activity |
| VerfasserIn |
Wolfgang Woiwode, Hermann Oelhaf, Andreas Dörnbrack, Martina Bramberger, Christopher Diekmann, Felix Friedl-Vallon, Michael Höpfner, Peter Hoor, Sören Johansson, Jens Krause, Daniel Kunkel, Johannes Orphal, Peter Preusse, Roland Ruhnke, Romy Schlage, Jennifer Schröter, Björn-Martin Sinnhuber, Jörn Ungermann, Andreas Zahn |
| Konferenz |
EGU General Assembly 2017
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 19 (2017) |
| Datensatznummer |
250145497
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| Publikation (Nr.) |
 EGU/EGU2017-9443.pdf |
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| Zusammenfassung |
| Tropopause folds are known of enabling efficient exchange of trace constituents between the
stratosphere and troposphere. In particular, the modification of the vertical distributions of
radiatively important H2O and other reactive trace gases associated with tropopause folds is
relevant for accurate model simulations of the upper troposphere and lower stratosphere
composition. During the POLSTRACC/GW-LCYCLE/SALSA flight on 12 January 2016, the
HALO (High Altitude LOng range) aircraft crossed twice an extended tropopause fold in the
vicinity of the Arctic polar vortex. At the same time, the ECMWF operational analysis
shows that the meteorological scenario probed above Italy was accompanied by
wide-spread gravity wave activity induced by north-westerly winds. Using high
spectral resolution limb-observations by the GLORIA (Gimballed Limb Observer for
Radiance Imaging of the Atmosphere) spectrometer aboard HALO and associated
observations, we investigate the vertical distributions of H2O, O3, temperature, and
associated parameters across the tropopause fold. In combination with a high-resolution
simulation by the ICON-ART (ICOsahedral Nonhydrostatic- Aerosol and Reactive
Trace gases) model, we search for indications for irreversible trace gas exchange
between the stratosphere and troposphere and the potential influence of gravity waves. |
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