A model study of the temporal behaviour of the emission intensity and rotational temperature of the OH Meinel bands for high-latitude summer conditions
Item
Title (Dublin Core)
A model study of the temporal behaviour of the emission intensity and rotational temperature of the OH Meinel bands for high-latitude summer conditions
Description (Dublin Core)
The temporal variation of OH<sup>*</sup> 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<sup>*</sup> measurements. An increase in OH<sup>*</sup> 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<sup>*</sup> concentration and weighted temperature of 16 days. The results show the temperature leading the OH<sup>*</sup> column concentration by three days. This phase shift is also present in the observations.
Creator (Dublin Core)
López-González, M. J.
Murtagh, D. P.
Espy, P. J.
López-Moreno, J. J.
Rodrigo, R.
Witt, G.
Date (Dublin Core)
2018-09-27
Type (Dublin Core)
Text
Format (Dublin Core)
application/pdf
Identifier (Dublin Core)
10.1007/s00585-996-0059-x
https://angeo.copernicus.org/articles/14/59/1996/
Source (Dublin Core)
eISSN: 1432-0576
Language (Dublin Core)
eng
