Results 31 to 40 of about 274,087 (189)

Anopheles (Cellia) carnevalei in Equatorial Guinea (West-Central Africa). [PDF]

, 2003
Anopheles (Cellia) carnevalei is described in the mainland region (Río Muni) of Equatorial Guinea. Anophelines collected were identical to An.
Nzambo, S, Ondo-Esono, M, Micha, F, Buatiche, JN, Cano, J, Benito, A   +5 more
core   +2 more sources

Further complexities on the pre-reversal vertical drift modeling over the Brazilian region: A comparison between long-term observations and model results

Journal of Space Weather and Space Climate, 2020
The vertical component of the plasma drift, especially the evening-time pre-reversal drift, constitutes an important aspect of the nighttime electrodynamics of the equatorial ionosphere.
Sousasantos Jonas, Abdu Mangalathayil Ali, Santos Angela, Batista Inez, Silva André, Loures Luis Eduardo   +5 more
doaj   +1 more source

Influence of annual atmospheric tide asymmetry on annual anomalies of the ionospheric mean state

Earth and Planetary Physics, 2020
Through respectively adding June tide and December tide at the low boundary of the GCITEM-IGGCAS model (Global Coupled Ionosphere–Thermosphere–Electrodynamics Model, Institute of Geology and Geophysics, Chinese Academy of Sciences), we simulate the ...
ZhiPeng Ren, WeiXing Wan, JianGang Xiong, Xing Li   +3 more
doaj   +1 more source

Relation of zonal plasma drift and wind in the equatorial F region as derived from CHAMP observations [PDF]

Annales Geophysicae, 2013
In this paper we estimate zonal plasma drift in the equatorial ionospheric F region without counting on ion drift meters. From June 2001 to June 2004 zonal plasma drift velocity is estimated from electron, neutral, and magnetic field observations of ...
J. Park, H. Lühr
doaj   +1 more source

Storm-time total electron content and its response to penetration electric fields over South America [PDF]

Annales Geophysicae, 2011
In this work the response of the ionosphere due to the severe magnetic storm of 7–10 November 2004 is investigated by analyzing GPS Total Electron Content (TEC) maps constructed for the South America sector.
P. M. de Siqueira, E. R. de Paula, M. T. A. H. Muella, L. F. C. Rezende, M. A. Abdu, W. D. Gonzalez   +5 more
doaj   +1 more source

Understanding Inter-Hemispheric Traveling Ionospheric Disturbances and Their Mechanisms

Remote Sensing, 2020
Traveling ionospheric disturbances (TIDs) are wave-like disturbances in ionospheric plasma density. They are often observed during both quiet (medium-scale TID) and geomagnetically disturbed (large-scale TID) conditions. Their amplitudes can reach double-
Olusegun F. Jonah, Shunrong Zhang, Anthea J. Coster, Larisa P. Goncharenko, Philip J. Erickson, William Rideout, Eurico R. de Paula, Rodolfo de Jesus   +7 more
doaj   +1 more source

Morphology of F-region vertical E×B drifts in the African sector using ionosonde measurements

Annals of Geophysics, 2007
F-region vertical velocities are derived from the ground-based ionosonde data for Ibadan (7.4°N, 3.9°E; dip 6°S: an equatorial station in the African zone), to study the general characteristics of electrodynamics of equatorial ionosphere, such ...
C. C. Oluwafemi, O. S. Oyekola
doaj   +1 more source

On the Role of Mild Substorms and Enhanced Hall Conductivity in the Plasma Irregularities Onset and Zonal Drift Reversals: Experimental Evidence at Distinct Longitudes Over South America

Earth and Space Science, 2023
The 14‐panel Advanced Modular Incoherent Scatter Radar (AMISR‐14) system deployed at Jicamarca observed equatorial spread F plumes on two consecutive nights under unfavorable seasonal and solar flux conditions during a period that can be categorized as ...
J. Sousasantos, F. S. Rodrigues, B. G. Fejer, M. A. Abdu, A. A. Massoud, C. E. Valladares   +5 more
doaj   +1 more source

Quiet Time Ionosphere‐Thermosphere Predictability During Sudden Stratospheric Warmings in TIE‐GCM

Space Weather, Volume 24, Issue 11, November 2026.
Abstract We investigate the predictability of the ionosphere‐thermosphere (IT) region during sudden stratospheric warmings (SSWs) by using subseasonal hindcasts in the Community Earth System Model, version 2 with the Whole Atmosphere Community Climate Model (CESM2 [WACCM6]) to force the lower boundary of the TIE‐GCM.
B. C. Martinez, N. M. Pedatella, Xian Lu
wiley   +1 more source

The relation between classical and quantum electrodynamics [PDF]

, 2008
In this article it is presented the idea that quantum electrodynamics presents intrinsic limitations in the description of physical processes that makes it impossible to recover from it the type of description we have with classical electrodynamics.
Bacelar Valente, Mario
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