Mesospheric temperature inversions over the Indian tropical region
To study the mesospheric temperature inversion, daily temperature profiles obtained from the Halogen Occultation Experiment (HALOE) aboard the Upper Atmospheric Research Satellite (UARS) during the period 1991-2001 over the Indian tropical region (0-30° N, 60-100° E) have been an...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2004-11-01
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| Series: | Annales Geophysicae |
| Online Access: | https://www.ann-geophys.net/22/3375/2004/angeo-22-3375-2004.pdf |
| Summary: | To study the mesospheric temperature inversion, daily temperature profiles
obtained from the Halogen Occultation Experiment (HALOE) aboard the Upper
Atmospheric Research Satellite (UARS) during the period 1991-2001 over
the Indian tropical region (0-30° N, 60-100° E) have been analyzed for
the altitude range 34-86km. The frequency of occurrence of inversion is found
to be 67% over this period, which shows a strong semiannual cycle, with a
maximum occurring one month after equinoxes (May and November). Amplitude of
inversion is found to be as high as 40K. Variation of monthly mean peak and
bottom heights along with amplitude of inversions also show the semiannual
cycle. The inversion layer is detected most frequently in the altitude range of
70-85km, with peak height ranging from 80 to 83km and that of the bottom height
from 72 to 74km. A comparison of frequency of temperature inversion with
that obtained from Rayleigh lidar observations over Gadanki (13.5° N,
60-100° E) is found to be reasonable. The seasonal variation of
amplitude and frequency of occurrence of temperature inversion indicates a
good correlation with seasonal variation of average ozone concentration over
the altitude range of the inversion layer. |
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| ISSN: | 0992-7689 1432-0576 |