Journal cover Journal topic
Annales Geophysicae An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

Journal metrics

  • IF value: 1.585 IF 1.585
  • IF 5-year value: 1.698 IF 5-year
    1.698
  • CiteScore value: 1.62 CiteScore
    1.62
  • SNIP value: 0.820 SNIP 0.820
  • IPP value: 1.52 IPP 1.52
  • SJR value: 0.781 SJR 0.781
  • Scimago H <br class='hide-on-tablet hide-on-mobile'>index value: 83 Scimago H
    index 83
  • h5-index value: 24 h5-index 24
Volume 20, issue 2
Ann. Geophys., 20, 203-212, 2002
https://doi.org/10.5194/angeo-20-203-2002
© Author(s) 2002. This work is distributed under
the Creative Commons Attribution 3.0 License.
Ann. Geophys., 20, 203-212, 2002
https://doi.org/10.5194/angeo-20-203-2002
© Author(s) 2002. This work is distributed under
the Creative Commons Attribution 3.0 License.

  28 Feb 2002

28 Feb 2002

Doppler temperatures from O(1D) airglow in the daytime thermosphere as observed by the Wind Imaging Interferometer (WINDII) on the UARS satellite

C. Lathuillère1, W. A. Gault2, B. Lamballais1, Y. J. Rochon3, and B. H. Solheim2 C. Lathuillère et al.
  • 1Laboratoire de Planétologie de Grenoble, CNRS/UJF/OSUG, Batiment D de Physique, BP 53, 38041 Grenoble Cedex 9, France
  • 2Centre for Research in Earth and Space Science, York University, 4700 Keele Street, Toronto, Ontario M3J 1P3, Canada
  • 3Meteorological Service of Canada, Environment Canada, 4905 Dufferin Street, Toronto, Ontario M3H 5T4, Canada
  • Correspondence to: C. Lathuillèret
  • (chantal.lathuillere@obs.ujf-grenoble.fr)

Abstract. From 1992 to 1997, the WINDII interferometer on board the UARS satellite acquired a large set of thermospheric data from the O(1D) and O(1S) airglows. We report here for the first time on daytime O(1D) Doppler temperatures obtained with version 5.11 of the WINDII data processing software. Using a statistical analysis of the temperatures independently measured by the two WINDII fields of view, we estimate that the temperature variations larger than 40 K can be considered as geophysical. Comparisons of WINDII temperatures measured during magnetically quiet days with temperatures obtained by the MSIS-90 and DTM-94 thermospheric models show a 100 K bias. We demonstrate, however, that the modeled temperature variations represent very well the mean temperature variation observed by WINDII over 4 years. We also show that the observed latitudinal/local time variation is in very good agreement with the two empirical models. Finally, the temperature variations during a magnetically disturbed day are found to be qualitatively well represented in form by the models, but largely underestimated. The presence of non-thermal atoms and instrument related issues are discussed as possible explanations for the 100 K bias between the WINDII Doppler temperatures and the empirical models.

Key words. Atmospheric composition and structure (air-glow and aurora; pressure, density and temperature; instruments and techniques)

Publications Copernicus
Download
Citation
Share