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| Titel |
Tropopause inversion layer and water vapour |
| VerfasserIn |
Isabel Peinke, Philipp Reutter, Peter Hoor, Peter Spichtinger |
| Konferenz |
EGU General Assembly 2013
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 15 (2013) |
| Datensatznummer |
250079141
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| Zusammenfassung |
| The tropopause inversion layer (TIL) is a phenomenon located close to the tropopause,
characterized by an enhanced static stability (N2) right above the temperature inversion of
the tropopause and by its adjacent minima. There is low understanding of formation and
maintenance of the TIL, but different hypotheses exist. On one hand, the balanced
dynamic in this region has an important impact on the evolution and sustainment of the
TIL. On the other hand, the radiative effects of ozone and water vapor near the
tropopause might play an important role for the formation and maintenance of the
TIL.
We use high resolution radiosonde data over the Meteorological Observatory Lindenberg,
Germany for the period February 2000 to April 2001 to investigate the impact of water vapor
on the TIL. Starting from the mean profiles, we analyze the main features of the tropopause
and the TIL. As it is known from the literature, we find a stronger TIL in summer compared
to winter. However, our results show a complementary behavior in the seasonal cycle of the
tropopause height and the TIL strength.
The influence of the relative humidity over ice (RHi) on the TIL was also investigated. We
show that high values of RHi lead to a cooler tropopause temperature and an enhanced
strength of the TIL. This means that the maximum of the static stability is higher for
high values of RHi and the adjacent minima are smaller than for low values of
RHi. |
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