<i>Letter to the Editor</i>: Spatial and seasonal variations of the <i>fo</i>F2 long-term trends - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Annales Geophysicae Année : 1999

Letter to the Editor: Spatial and seasonal variations of the foF2 long-term trends

Résumé

Using a method suggested by the authors earlier, the long-term trends of the F2-layer critical frequency, foF2 are derived for a set of ionospheric stations with a wide latitudinal and longitudinal coverage. All the trends are found to be negative. A pronounced dependence on geomagnetic latitude is found, the trend magnitude increasing with the latter. No globe scale longitudinal effect in trends is detected. For the majority of the stations there is also a pronounced seasonal effect, the trend magnitude being higher in summer than in winter.
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Dates et versions

hal-00316668 , version 1 (18-06-2008)

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  • HAL Id : hal-00316668 , version 1

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A. D. Danilov, A. V. Mikhailov. Letter to the Editor: Spatial and seasonal variations of the foF2 long-term trends. Annales Geophysicae, 1999, 17 (9), pp.1239-1243. ⟨hal-00316668⟩

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