The F-region trough : seasonal morphology and relation to interplanetary magnetic field
作者： M. Voiculescu , I. Virtanen , T. Nygrén
DOI: 10.5194/ANGEO-24-173-2006
关键词:
摘要: Abstract. We present here the results of a statistical study ionospheric trough observed in 2003 by means satellite tomography. focus on seasonal morphology occurrence and investigate latitude, width horizontal gradients at edges, different magnetic local times, as well their relations to geomagnetic activity interplanetary field. A effect is noticed diurnal variation indicating that summer clearly differs from other seasons. In winter troughs seem follow solar terminator. The has it depends season, well. broadest are narrowest ones summer. discontinuity latitude before noon. It suggested this an indication difference between generation mechanisms morningside eveningside troughs. density edges have complex dependence activity. photoionization auroral precipitation competing formation walls times. An important finding field plays role levels This probably associated with topology polar cap convection pattern, which directions IMF components By Bz.
harvard.edu
archives-ouvertes.fr
ann-geophys.net参考文章(16)
Tuomo Nygrén, Markku Markkanen, Markku Lehtinen, Evgeny D. Tereshchenko, Boris Z. Khudukon, Stochastic inversion in ionospheric radiotomography Radio Science. ,vol. 32, pp. 2359- 2372 ,(1997) , 10.1029/97RS02915
P.N Collis, I Häggström, Plasma convection and auroral precipitation processes associated with the main ionospheric trough at high latitudes Journal of Atmospheric and Solar-Terrestrial Physics. ,vol. 50, pp. 389- 404 ,(1988) , 10.1016/0021-9169(88)90024-4
L. Kersley, S. E. Pryse, I. K. Walker, J. A. T. Heaton, C. N. Mitchell, M. J. Williams, C. A. Willson, Imaging of electron density troughs by tomographic techniques Radio Science. ,vol. 32, pp. 1607- 1621 ,(1997) , 10.1029/97RS00310
I. Horvath, E.A. Essex, The southern-hemisphere mid-latitude day-time and night-time trough at low-sunspot numbers Journal of Atmospheric and Solar-Terrestrial Physics. ,vol. 65, pp. 917- 940 ,(2003) , 10.1016/S1364-6826(03)00113-5
R. W. Schunk, A mathematical model of the middle and high latitude ionosphere Pure and Applied Geophysics. ,vol. 127, pp. 255- 303 ,(1988) , 10.1007/BF00879813
R.J. Moffett, S. Quegan, The mid-latitude trough in the electron concentration of the ionospheric F-layer: a review of observations and modelling Journal of Atmospheric and Terrestrial Physics. ,vol. 45, pp. 315- 343 ,(1983) , 10.1016/S0021-9169(83)80038-5
S. Werner, G.W. Prölss, The position of the ionospheric trough as a function of local time and magnetic activity Advances in Space Research. ,vol. 20, pp. 1717- 1722 ,(1997) , 10.1016/S0273-1177(97)00578-4
M Mallis, E.A Essex, Diurnal and seasonal variability of the southern-hemisphere main ionospheric trough from differential-phase measurements Journal of Atmospheric and Solar-Terrestrial Physics. ,vol. 55, pp. 1021- 1037 ,(1993) , 10.1016/0021-9169(93)90095-G
A.T. Karpachev, M.G. Deminov, V.V. Afonin, Model of the mid-latitude ionospheric trough on the base of Cosmos-900 and Intercosmos-19 satellites data Advances in Space Research. ,vol. 18, pp. 221- 230 ,(1996) , 10.1016/0273-1177(95)00928-0
R. I. Crickmore, B. Jenkins, G. J. Bailey, Variations in the altitude of the F2 peak associated with trough-formation processes Annales Geophysicae. ,vol. 14, pp. 628- 636 ,(1996) , 10.1007/S00585-996-0628-Z