Middle atmosphere response to the 27-day solar rotation as observed by lidar - Archive ouverte HAL Access content directly
Journal Articles Geophysical Research Letters Year : 1992

Middle atmosphere response to the 27-day solar rotation as observed by lidar

(1) , (1)
1
Philippe Keckhut
  • Function : Author
  • PersonId : 918122

Abstract

The response of the middle atmosphere temperature to short term solar UV radiation related to the 27-day period of the sun has been studied by Rayleigh Lidar at mid-latitude in the height range 30–90 km. Among the 9 sequences, each of 3 to 4 months duration, which corresponds to clear solar signature, two types of behavior have been found: either the temperature response is positively correlated with the solar UV flux in the whole height range, or the response reverses abruptly from positive to negative within the height interval 40–60 km. It is important to notice that this second type of behavior is observed as well in summer or in winter, i.e. even in the absence of planetary wave activity, but has only been seen during the Westward phase of the QBO. If such a change of the temperature is confirmed to be solar induced, this response to change in the UV flux is clearly different from the one we observed for the 11-year solar cycle. Therefore the 27-day signature of atmospheric structure should not be used as a proxy for the 11-year variation
Fichier principal
Vignette du fichier
grl5907.pdf (592.22 Ko) Télécharger le fichier
Origin : Files produced by the author(s)

Dates and versions

insu-03860789 , version 1 (18-11-2022)

Identifiers

Cite

Philippe Keckhut, Marie-Lise Chanin. Middle atmosphere response to the 27-day solar rotation as observed by lidar. Geophysical Research Letters, 1992, 19 (8), pp.809-812. ⟨10.1029/92GL00045⟩. ⟨insu-03860789⟩
0 View
0 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More