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| Titel |
The Winter Arctic Stratosphere in 2009/2010 - Overview, Gravity Wave Activity and Predictability of Sudden Stratospheric Warmings |
| VerfasserIn |
Andreas Dörnbrack, Michael C. Pitts, Lamont R. Poole |
| Konferenz |
EGU General Assembly 2011
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 13 (2011) |
| Datensatznummer |
250048502
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| Zusammenfassung |
| The evolution of the Arctic winter 2009/2010, especially the stratospheric conditions during
the two phases of the RECONCILE (Reconciliation of Essential Process Parameters for an
Enhanced Predictability of Arctic Stratospheric Ozone Loss and its Climate Interactions, an
EU-FP7 project, see: https://www.fp7-reconcile.eu) field campaign will be discussed. The
operational products of the Integrated Forecast System (IFS) of the European Centre for
Medium-Range Weather Forecasts (ECMWF) are analysed to provide meteorological fields
characterising the vortex evolution. The characteristics of the polar vortex before,
during and after the sudden stratospheric warming end of January 2010 will be
emphasized. Climatological questions like: Was this winter an exceptional cold
one compared to previous winters? and others will be answered by analysing the
ERA-Interimdata set (ERA-Interim is the latest ECMWF global atmospheric reanalysis of
the period 1989 to present. Information on the resolution, the data assimilation
system, the observations and the boundary forcing of the ECMWF-Interim reanalysis
project can be found under http://www.ecmwf.int/research/era/do/get/era-interim).
The communication presents a detailed analysis of the gravity wave activity in
relation to the CALIPSO (Cloud-Aerosol Lidar and Infrared Pathfinder Satellite
Observations, see http://www-calipso.larc.nasa.gov/) observations of mountain-wave
induced polar stratospheric clouds over Greenland. A new aspect is the analysis of the
50 members of the ECMWF’s ensemble prediction system to predict the sudden
stratospheric warming events begin of December 2009 and end of January 2010. |
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