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Detection of temperatures conducive to Arctic polar stratospheric clouds using CHAMP and SAC-C radio occultation data

de la Torre Juárez, M. and Marcus, S. and Dörnbrack, A. and Schrøder, T. M. and Kivi, R. and Iijima, B. A. and Hajj, G. A. and Mannucci, A. J. (2009) Detection of temperatures conducive to Arctic polar stratospheric clouds using CHAMP and SAC-C radio occultation data. Journal of Geophysical Research, 114 (D07112), pp. 1-13. DOI: 10.1029/2008JD011261.

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Official URL: http://www.agu.org/journals/jd/jd0907/2008JD011261/

Abstract

We use global positioning system radio occultation (GPSRO) data from the Challenging Mini-Satellite Payload for Geophysical Research and Application (CHAMP) and Satélite de Applicaciones Científicas-C (SAC-C) low Earth orbiting satellites to investigate the occurrence of air with temperatures cold enough to allow the formation of polar stratospheric clouds (PSCs) during four successive Arctic winters spanning 2001 to 2005. The GPSRO data are validated and compared with analysis data from the European Centre for Medium-Range Weather Forecasts using a series of criteria designed to eliminate faulty soundings but retain profiles which do not differ too strongly from the model data. We find that GPSRO is able to detect more PSC-prone temperature profiles during winters with disturbed conditions (in particular during December 2001 and 2003) than the analysis, but that the model fully captures the extent of PSC-prone air in winters with strong, cold vortices (in particular December 2002 and January 2005). Examination of detailed profiles for December 2001 shows that this difference is due to the ability of GPSRO to detect short-vertical wavelength features which may represent either localized gravity or global-scale planetary waves. Since the GPSRO data are now being directly assimilated into operational analysis systems, the benefits of the higher vertical resolution retrievals it provides should become evident in future observational studies of PSC formation and ozone loss, particularly under the disturbed conditions noted in several recent winters.

Document Type:Article
Title:Detection of temperatures conducive to Arctic polar stratospheric clouds using CHAMP and SAC-C radio occultation data
Authors:
AuthorsInstitution or Email of Authors
de la Torre Juárez, M.California Inst. of Technology, Pasadena, CA, USA
Marcus, S.California Inst. of Technology, Pasadena, CA, USA
Dörnbrack, A.DLR
Schrøder, T. M.California Inst. of Technology, Pasadena, CA, USA
Kivi, R.Finnish Meteorological Inst., Sodankylä, FIN
Iijima, B. A.California Inst. of Technology, Pasadena, CA, USA
Hajj, G. A.California Inst. of Technology, Pasadena, CA, USA
Mannucci, A. J.California Inst. of Technology, Pasadena, CA, USA
Date:2009
Journal or Publication Title:Journal of Geophysical Research
Refereed publication:Yes
In Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:114
DOI:10.1029/2008JD011261
Page Range:pp. 1-13
Status:Published
Keywords:GPS radio occultation, Polar Stratospheric Clouds
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EO - Erdbeobachtung
DLR - Research area:Space
DLR - Program:W EO - Erdbeobachtung
DLR - Research theme (Project):W - Vorhaben Atmosphären- und Klimaforschung (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Cloud Physics and Traffic Meteorology
Deposited By: Jana Freund
Deposited On:12 May 2010 13:33
Last Modified:23 Jan 2014 11:36

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