Statistical study of the DP2 enhancement at the dayside dip-equator compared to low latitudes - Archive ouverte HAL Access content directly
Journal Articles Annales Geophysicae Year : 2011

Statistical study of the DP2 enhancement at the dayside dip-equator compared to low latitudes

(1) , (1) , (1) , (1) , (1) , (2) , (1)
1
2

Abstract

It has been largely investigated and established that the DP2 events are enhanced at dip-equator compared to low latitudes. Studies by several authors showed various enhancement ratio values of DP2 amplitude at the dayside dipequator relative to those at low latitudes. In order to quantify this enhancement ratio, we carried out a statistical study on this phenomenon using the ground magnetometer data at locations ranging from polar cap to dip-equator over the African, Asian and American sector. Our result gave an enhancement ratio which shows a diurnal variation with a maximum value around 12:00 LT and is correlated with the regular variation of the geomagnetic H-component. The longitudinal variation of the enhancement ratio of the DP2 exhibits high values over the American sector compared to Asian sector and African sector which have lowest values. This longitudinal dependence is similar to that of the equatorial electrojet magnetic effect.
Fichier principal
Vignette du fichier
Mene2011nA_71.pdf (264.46 Ko) Télécharger le fichier
Origin : Publisher files allowed on an open archive
Loading...

Dates and versions

hal-00966402 , version 1 (26-03-2014)

Identifiers

Cite

N.M. Mene, A. T. Kobea, O.K. Obrou, K.Z. Zaka, K. Boka, et al.. Statistical study of the DP2 enhancement at the dayside dip-equator compared to low latitudes. Annales Geophysicae, 2011, pp.1-9. ⟨10.5194/angeo-29-2225-2011⟩. ⟨hal-00966402⟩
285 View
113 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More