Skip to Main content Skip to Navigation
Journal articles

Mesospheric temperature inversion and gravity wave breaking

Abstract : More than 500 nightly mean temperature profiles have been obtained since 1981 by two Rayleigh lidars located in south of France 550 km apart. In the mesosphere a temperature inversion, a feature persisting for several days, is frequently observed simultaneously at both sites. From a statistical study of the inversion characteristics, it is shown that its altitude ranges from 55-72 km in winter to 70-83 km in summer, while its probability of occurrence presents a semi-annual variation with a maximum higher in winter than in summer and a minimum lower in May than in September. The seasonal variation of the temperature inversion is shown to be very similar to that of the MST radar echoes in the mesosphere associated to turbulent layers generated by the breaking of gravity waves. A crude estimate of the amplitude growth with height of a gravity wave in the presence of an inversion layer indicates that the wave will break preferably inside and above this layer. The persistence of a temperature inversion during several days, with amplitude as large as 40 K, is tentatively explained by the heating of the turbulent layers generated by the continuous breaking of gravity waves above the secondary minimum of temperature.
Complete list of metadata

https://hal-insu.archives-ouvertes.fr/insu-03123428
Contributor : Catherine Cardon Connect in order to contact the contributor
Submitted on : Thursday, January 28, 2021 - 6:46:56 AM
Last modification on : Friday, January 29, 2021 - 3:30:23 AM
Long-term archiving on: : Thursday, April 29, 2021 - 6:12:08 PM

File

GL014i009p00933.pdf
Publisher files allowed on an open archive

Identifiers

Citation

Alain Hauchecorne, Marie-Lise Chanin, Richard Wilson. Mesospheric temperature inversion and gravity wave breaking. Geophysical Research Letters, American Geophysical Union, 1987, 14 (9), pp.933-936. ⟨10.1029/GL014i009p00933⟩. ⟨insu-03123428⟩

Share

Metrics

Record views

43

Files downloads

69