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The 2009-�2010 Arctic stratospheric winter -� general evolution, mountain waves and predictability of an operational weather forecast model

Dörnbrack, A. und Pitts, M.C. und Poole, L.R. und Orsolini, Y.J. und Nishii, K. und Nakamura, H. (2012) The 2009-�2010 Arctic stratospheric winter -� general evolution, mountain waves and predictability of an operational weather forecast model. Atmospheric Chemistry and Physics, 12, Seiten 3659-3675. DOI: 10.5194/acp-12-3659-2012.

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Offizielle URL: http://www.atmos-chem-phys.net/12/3659/2012/

Kurzfassung

The relatively warm 2009�2010 Arctic winter was an exceptional one as the North Atlantic Oscillation index attained persistent extreme negative values. Here, selected aspects of the Arctic stratosphere during this winter inspired by the analysis of the international field experiment RECONCILE are presented. First of all, and as a kind of reference, the evolution of the polar vortex in its different phases is documented. Special emphasis is put on explaining the formation of the exceptionally cold vortex in mid winter after a sequence of stratospheric disturbances which were caused by upward propagating planetary waves. A major sudden stratospheric warming (SSW) occurring near the end of January 2010 concluded the anomalous cold vortex period. Wave ice polar stratospheric clouds were frequently observed by spaceborne remote-sensing instruments over the Arctic during the cold period in January 2010. Here, one such case observed over Greenland is analysed in more detail and an attempt is made to correlate flow information of an operational numerical weather prediction model to the magnitude of the mountain-wave induced temperature fluctuations. Finally, it is shown that the forecasts of the ECMWF ensemble prediction system for the onset of the major SSW were very skilful and the ensemble spread was very small. However, the ensemble spread increased dramatically after the major SSW, displaying the strong non-linearity and internal variability involved in the SSW event.

Dokumentart:Zeitschriftenbeitrag
Titel:The 2009-�2010 Arctic stratospheric winter -� general evolution, mountain waves and predictability of an operational weather forecast model
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Dörnbrack, A.NICHT SPEZIFIZIERT
Pitts, M.C.NASA Langley Research Center, Hampton, VA, USA
Poole, L.R.SSAI, Hampton, VA, USA
Orsolini, Y.J.NILU, Kjeller, N
Nishii, K.Univ. of Tokyo, Tokyo, J
Nakamura, H.Univ. of Tokyo, Tokyo, J
Datum:2012
Erschienen in:Atmospheric Chemistry and Physics
Referierte Publikation:Ja
In Open Access:Ja
In SCOPUS:Ja
In ISI Web of Science:Ja
Band:12
DOI :10.5194/acp-12-3659-2012
Seitenbereich:Seiten 3659-3675
Status:veröffentlicht
Stichwörter:North Atlantic Oscillation index, SSW
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Raumfahrt
HGF - Programmthema:Erdbeobachtung
DLR - Schwerpunkt:Raumfahrt
DLR - Forschungsgebiet:R EO - Erdbeobachtung
DLR - Teilgebiet (Projekt, Vorhaben):R - Vorhaben Atmosphären- und Klimaforschung
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Institut für Physik der Atmosphäre > Wolkenphysik und Verkehrsmeteorologie
Hinterlegt von: Jana Freund
Hinterlegt am:01 Aug 2012 11:38
Letzte Änderung:12 Dez 2013 21:44

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