a model study of the temporal behaviour of the emission intensity and rotational temperature of the oh meinel bands for high-latitude summer conditions
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ID: 182657
1996
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Abstract
The temporal variation of OH*
emission and weighted rotational temperature has been studied for high-latitude
summer conditions. Observations for 60°N latitude show OH weighted temperatures
that always exceed 145 K even during periods of noctilucent clouds. Using a
one-dimensional model the effects in excited OH concentration produced by
changes in temperature, eddy diffusion, and water concentration have been
analysed. We are forced to conclude that there remains a discrepancy between the
OH temperatures predicted by the model and that obtained from OH*
measurements. An increase in OH* concentration from June to the
beginning of August, followed by a slow decrease during August has been obtained
in agreement with the measurements. The 16-day modulation present in the
measurements was simulated in a simple manner by varying the temperature in the
mesopause region. This variation produces periodic modulations in both OH*
concentration and weighted temperature of 16 days. The results show the
temperature leading the OH* column concentration by three days. This
phase shift is also present in the observations.
| Reference Key |
lpez-gonzlez1996annalesa
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|---|---|
| Authors | ;M. J. López-González;D. P. Murtagh;P. J. Espy;J. J. López-Moreno;R. Rodrigo;G. Witt |
| Journal | journal of food measurement and characterization |
| Year | 1996 |
| DOI |
10.1007/s00585-996-0059-x
|
| URL | |
| Keywords |
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