Seasonal temperature variations in the mesopause region at mid-latitude: comparison of lidar and hydroxyl rotational temperatures using windii⧹uars oh Height profiles
✍ Scribed by C.Y She; R.P Lowe
- Publisher
- Elsevier Science
- Year
- 1998
- Tongue
- English
- Weight
- 561 KB
- Volume
- 60
- Category
- Article
- ISSN
- 1364-6826
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✦ Synopsis
Fifty!one nights of lidar data and seventy!eight nights of Fourier transform spectrometer data taken during 0882 for the purpose of temperature measurements in the mesopause region were analyzed[ Observed OH !temperatures from the "2!0# band over Delaware Observatory "32>N# were compared statistically to "0# Na!layer temperatures\ "1# tem! peratures at 76 km\ and "2# OH !temperatures inferred from the WINDII observed OH height pro_les and lidar observed temperature pro_les\ all over Fort Collins "30>N#[ Seasonal temperature variations were deduced for two midlatitude sites and the resulting measurements were compared statistically[ Very good agreement was obtained between the two sites in the magnitude of seasonal di}erences and variations[ With marginal statistical signi_cance\ an overall 5Ð6 K di}erence between the observed and inferred seasonal averaged temperatures was detected[ Other than the ½2 K di}erence in the summer accountable by the latitude di}erence\ the remaining discrepancy may be tentatively resolved by a longitudinal di}erence with higher temperatures near mountainous region\ revealed from a comparison of temperatures observed at the same nights over di}erent Stations[ Even with substantial data set considered here\ geophysical variability still dominates the measurement uncertainty in seasonal means[ One useful conclusion of this study is that for many purposes\ the hydroxyl rotational temperature can be used as proxy for the temperatures at 7623 km[ Þ 0887 Elsevier Science Ltd[ All rights reserved[