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The effect of Doppler correction on measures of storm track intensity

Burkhardt, Ulrike und James, Ian N. (2006) The effect of Doppler correction on measures of storm track intensity. Climate Dynamics, 27, Seiten 515-530. DOI: 10.1007/s00382-006-0146-4.

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Offizielle URL: http://www.springerlink.com/content/m3831226v49t8h25/

Kurzfassung

In climate research, the intensity of a storm track is often measured by the band pass filtered eddy kinetic energy, geopotential variance or related variables. The interpretation of such fields disregards the influence the advection speed might have on these measures. In this paper the need for a Doppler corrected storm track measure is discussed. A Doppler corrected measure is defined and applied to 10 years of ECMWF reanalysis data, correcting the storm track measure for spatial and temporal variability of the advection speed. The storm track intensity is also calculated correcting only for the temporal variability of the advection speed. It is also related to fluctuations of the NAO teleconnection pattern. The Doppler correction suggests that (1) maximum and minimum baroclinic activity is found somewhat downstream of the locations indicated by non-corrected measures, (2) the storm track activity estimated by conventional measures is much too low in the areas of the eastern ends of the storm tracks, (3) the monthly mean time series of the strength of a storm track, as estimated by conventional measures, is strongly influenced by the variability of the advection speed at times, (4) the strength of the storm track seems to be less strongly connected with teleconnection patterns such as NAO or with the background mean flow speed than usually thought on the basis of conventional Eulerian statistics.

Dokumentart:Zeitschriftenbeitrag
Titel:The effect of Doppler correction on measures of storm track intensity
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Burkhardt, UlrikeNICHT SPEZIFIZIERT
James, Ian N.Univ. of Reading, Reading, UK
Datum:2006
Erschienen in:Climate Dynamics
Referierte Publikation:Ja
In Open Access:Nein
In SCOPUS:Ja
In ISI Web of Science:Ja
Band:27
DOI :10.1007/s00382-006-0146-4
Seitenbereich:Seiten 515-530
Status:veröffentlicht
Stichwörter:storm track intensity, Doppler correction, NAO, EEOF-Filter
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Weltraum (alt)
HGF - Programmthema:W EO - Erdbeobachtung
DLR - Schwerpunkt:Weltraum
DLR - Forschungsgebiet:W EO - Erdbeobachtung
DLR - Teilgebiet (Projekt, Vorhaben):W - Vorhaben Atmosphären- und Klimaforschung (alt)
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Institut für Physik der Atmosphäre > Dynamik der Atmosphäre
Hinterlegt von: Dr.rer.nat. Ulrike Burkhardt
Hinterlegt am:13 Jul 2007
Letzte Änderung:11 Nov 2014 21:56

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