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| Titel |
Observation of a tropopause fold by MARA VHF wind-profiler radar and ozonesonde at Wasa, Antarctica: comparison with ECMWF analysis and a WRF model simulation |
| VerfasserIn |
M. Mihalikova, S. Kirkwood  , J. Arnault, D. Mikhaylova |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 30, no. 9 ; Nr. 30, no. 9 (2012-09-28), S.1411-1421 |
| Datensatznummer |
250017272
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| Publikation (Nr.) |
 copernicus.org/angeo-30-1411-2012.pdf |
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| Zusammenfassung |
| Tropopause folds are one of the mechanisms of stratosphere–troposphere
exchange, which can bring ozone rich stratospheric air to low altitudes in
the extra-tropical regions. They have been widely studied at northern mid- or
high latitudes, but so far almost no studies have been made at mid- or high
southern latitudes. The Moveable Atmospheric Radar for Antarctica (MARA), a
54.5 MHz wind-profiler radar, has operated at the Swedish summer station
Wasa, Antarctica (73° S, 13.5° W) during austral
summer seasons from 2007 to 2011 and has observed on several occasions
signatures similar to those caused by tropopause folds at comparable Arctic
latitudes. Here a case study is presented of one of these events when an
ozonesonde successfully sampled the fold. Analysis from European Center for
Medium Range Weather Forecasting (ECMWF) is used to study the circumstances
surrounding the event, and as boundary conditions for a mesoscale simulation
using the Weather Research and Forecasting (WRF) model. The fold is well
resolved by the WRF simulation, and occurs on the poleward side of the polar
jet stream. However, MARA resolves fine-scale layering associated with the
fold better than the WRF simulation. |
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