Title :
A new perspective to the daytime h´F variations and its role in modulating the mesopause energetics over equatorial latitudes
Author :
Sumod, S.G. ; Pant, T.K. ; Vineeth, C. ; Hossain, M.M.
Author_Institution :
Space Phys. Lab., Vikram Sarabhai Space Centre, Trivandrum, India
Abstract :
This study reports unique observations, illustrating the vertical coupling between the daytime mesopause and F region of the ionosphere over a magnetic dip equatorial station Trivandrum in India. For the `first time´, it has been shown that the temporal variations in the mean daytime mesopause temperatures (MPT), during geomagnetically quiet days corroborate well with that of the base height changes (h´F) of the ionosphere. However, there exist some characteristic time delays between these two, which vary from 0 to 90 minutes. The observed time delays are attributed to the role of chemistry/dynamics in modulating atomic oxygen at these altitudes.
Keywords :
F-region; atmospheric composition; atmospheric temperature; geomagnetic variations; F region; India; Trivandrum station; atomic oxygen; base height; daytime h F variations; daytime mesopause; equatorial latitudes; geomagnetically quiet days; magnetic dip equatorial station; mean daytime mesopause temperatures; mesopause energetics; temporal variations; Atmospheric waves; Couplings; Delay effects; Extraterrestrial measurements; Ionosphere; Temperature measurement; Tides;
Conference_Titel :
General Assembly and Scientific Symposium, 2011 XXXth URSI
Conference_Location :
Istanbul
Print_ISBN :
978-1-4244-5117-3
DOI :
10.1109/URSIGASS.2011.6050972
