Physics
Scientific paper
Dec 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993angeo..11.1026s&link_type=abstract
Annales Geophysicae (ISSN 0992-7689), vol. 11, no. 11/12, p. 1026-1032
Physics
8
F 2 Region, Magnetic Storms, Night, Thermosphere, Winter, Atmospheric Turbulence, Neutral Gases, Nitrogen, Oxygen Atoms
Scientific paper
Night-time negative foF2 deviations followed by zero or positive daytime Delta foF2 values in the course of a magnetic storm in the winter midlatitude ionosphere are considered. Thermospheric N2/O enhancement is regarded as a possible alternative to the hypothesis of protonosphere fluxes influence to night-time F2-region. In order to prove this a time scale of horizontal and vertical neutral gas advection was estimated using direct neutral composition measurements obtained by the ESRO-4 satellite during several storms in 1972-1974. It is shown that horizontal advection is the leading term in the continuity equation for atomic oxygen in the night-time winter midlatitude thermosphere since extremely steep latitudinal gradients exist there during storm periods. The e-folding time was estimated to be about 3-6 hours. Such a short time scale results in oscillating composition perturbation at midlatitudes with unperturbed N2/O values during daytime hours when the meridional wind sweeps perturbed air towards the poles. The latitudinal movement of the perturbed region is well seen in the case of 25-27 January 1974, magnetic storm for which data of two satellites (AE-C in the afternoon and ESRO-4 in the early morning sectors) were available. The ionospheric response is shown to be quantitatively explained by neutral composition observations.
Foerster Michael
Skoblin M. G.
No associations
LandOfFree
An alternative explanation of ionization depletions in the winter night-time storm-perturbed F2-Layer does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with An alternative explanation of ionization depletions in the winter night-time storm-perturbed F2-Layer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and An alternative explanation of ionization depletions in the winter night-time storm-perturbed F2-Layer will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-783594