Assessment of the quality of OSIRIS mesospheric temperatures using satellite and ground-based measurements 1Department of Physics, University of Toronto, Toronto, Ontario, Canada
05 Dec 2012
2ISAS, Department of Physics and Engineering Physics, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
3Center for Atmospheric Sciences, Hampton University, Hampton, Virginia, USA
4Department of Chemistry, University of Waterloo, Waterloo, Ontario, Canada
5GATS Inc., Driggs, Idaho, USA
6Department of Physics and Astronomy, University of Western Ontario, London, Ontario, Canada
Received: 10 Jul 2012 – Published in Atmos. Meas. Tech. Discuss.: 13 Aug 2012 Abstract. The Optical Spectrograph and InfraRed Imaging System (OSIRIS) on the Odin
satellite is currently in its 12th year of observing the Earth's limb.
For the first time, continuous temperature profiles extending from the
stratopause to the upper mesosphere have been derived from OSIRIS
measurements of Rayleigh-scattered sunlight. Through most of the mesosphere,
OSIRIS temperatures are in good agreement with coincident temperature
profiles derived from other satellite and ground-based measurements. In the
altitude region of 55–80 km, OSIRIS temperatures are typically within 4–5 K
of those from the SABER, ACE-FTS, and SOFIE instruments on the TIMED,
SciSat-I, and AIM satellites, respectively. The mean differences between
individual OSIRIS profiles and those of the other satellite instruments are
typically within the combined uncertainties and previously reported biases.
OSIRIS temperatures are typically within 2 K of those from the University of
Western Ontario's Purple Crow Lidar in the altitude region of 52–79 km,
where the mean differences are within combined uncertainties. Near 84 km,
OSIRIS temperatures exhibit a cold bias of 10–15 K, which is due to a cold
bias in OSIRIS O2 A-band temperatures at 85 km, the upper boundary of
the Rayleigh-scatter derived temperatures; and near 48 km OSIRIS
temperatures exhibit a cold bias of 5–15 K, which is likely due to
multiple-scatter effects that are not taken into account in the retrieval.
Revised: 06 Nov 2012 – Accepted: 15 Nov 2012 – Published: 05 Dec 2012
Citation: Sheese, P. E., Strong, K., Llewellyn, E. J., Gattinger, R. L., Russell III, J. M., Boone, C. D., Hervig, M. E., Sica, R. J., and Bandoro, J.: Assessment of the quality of OSIRIS mesospheric temperatures using satellite and ground-based measurements, Atmos. Meas. Tech., 5, 2993-3006, doi:10.5194/amt-5-2993-2012, 2012.