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Improved estimates for neutral air temperatures at 90 km and 78°N using satellite and meteor radar data

Dyrland, M.E. and Hall, C.M. and Mulligan, F.J. and Tsutsumi, M. and Sigernes, F. (2010) Improved estimates for neutral air temperatures at 90 km and 78°N using satellite and meteor radar data. Radio Science, 45 (4006). pp. 1-10. ISSN 0048-6604

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Abstract

A technique for using satellite‐derived temperatures to calibrate initial estimates of 90 km temperatures measured by meteor wind radar is presented. Temperatures derived from the Nippon/Norway Svalbard Meteor Radar, situated on Svalbard at 78°N, 16°E, are calibrated using data from the Aura spacecraft’s Microwave Limb Sounder (MLS) experiment. The calibration was performed in a two‐step process: after an initial calibration of first‐guess temperatures, results were used to adjust the MLS values to reflect daily means rather than the 0200–1100 UT observation period of the satellite instrument; thereafter the calibration was repeated with the revised MLS temperatures. The resulting temperature time series represents a marked improvement on earlier results calibrated using hydroxyl emission and potassium/K‐Lidar observations, as the uncertainty is reduced from 17 to 7 K. These latest results represent a new step toward reliable and continual monitoring of upper mesosphere/lower thermosphere temperature.

Item Type: Article
Additional Information: An edited version of this paper was published by AGU. Copyright (2010) American Geophysical Union. Acknowledgments: The satellite data used in this study were acquired as part of the activities of the NASA Earth‐Sun System Division, and are archived and distributed by the Goddard Earth Sciences (GES) Data and Information Services Center (DISC). We are highly appreciative of the NASA EOS Aura MLS and NASA TIMED SABER teams for providing free access to the data. We are also grateful to Chuck Deehr at the Geophysical Institute, University of Alaska Fairbanks, and Takehiko Aso, National Institute of Polar Research, Tokyo, for their initiatives for putting the ground‐based instruments in Svalbard and for sharing the data. We would also like to thank the two anonymous reviewers for their valuable input.
Keywords: neutral air temperatures; satellite; meteor radar data; 90 km temperatures; Nippon/Norway Svalbard Meteor Radar; Microwave Limb Sounder; MLS;
Subjects: Science & Engineering > Experimental Physics
Item ID: 1010
Identification Number: 10.1029/2009RS004344
Depositing User: Dr. Frank Mulligan
Date Deposited: 08 Sep 2011 08:15
Journal or Publication Title: Radio Science
Publisher: American Geophysical Union (AGU)
Refereed: Yes
URI:

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