Results 11 to 20 of about 22,029 (223)

A space hurricane over the Earth's polar ionosphere. [PDF]

Nat Commun, 2021
AbstractIn Earth’s low atmosphere, hurricanes are destructive due to their great size, strong spiral winds with shears, and intense rain/precipitation. However, disturbances resembling hurricanes have not been detected in Earth’s upper atmosphere. Here, we report a long-lasting space hurricane in the polar ionosphere and magnetosphere during low solar ...
Zhang QH, Zhang YL, Wang C, Oksavik K, Lyons LR, Lockwood M, Yang HG, Tang BB, Moen JI, Xing ZY, Ma YZ, Wang XY, Ning YF, Xia LD.   +13 more
europepmc   +7 more sources

Space weather challenges of the polar cap ionosphere [PDF]

Journal of Space Weather and Space Climate, 2013
This paper presents research on polar cap ionosphere space weather phenomena conducted during the European Cooperation in Science and Technology (COST) action ES0803 from 2008 to 2012.
Spogli Luca, Romano Vineenzo, Daabakk Yvonne, Alfonsi Lucilla, Oksavik Kjellmar, Moen Jøran   +5 more
doaj   +5 more sources

A simple axisymmetric model of magnetosphere‐ionosphere coupling currents in Jupiter's polar ionosphere [PDF]

Journal of Geophysical Research: Space Physics, 2005
We propose a simple illustrative axisymmetric model of the plasma flow and currents in Jupiter's polar ionosphere which are due both to internal magnetospheric plasma processes and the solar wind interaction. The plasma flow in the model is specified using a combination of observations, previous modeling, and theory, and the ionospheric and field ...
Cowley, S. W. H., Alexeev, I., Belenkaya, E. S., Bunce, E., Cottis, C. E., Kalegaev, Vladimir V., Nichols, Jonathan D., Prangé, Renée, Wilson, F. J.   +8 more
openaire   +5 more sources

The polar ionosphere: Editorial [PDF]

Geophysical Research Letters, 1984
Editorial
Wickwar, Vincent B., Meriwether jr., J W
openaire   +3 more sources

Local Mapping of Polar Ionospheric Electrodynamics

Journal of Geophysical Research: Space Physics, 2022
AbstractAn accurate description of the state of the ionosphere is crucial for understanding the physics of Earth's coupling to space, including many potentially hazardous space weather phenomena. To support this effort, ground networks of magnetometer stations, optical instruments, and radars have been deployed.
K. M. Laundal, J. P. Reistad, S. M. Hatch, M. Madelaire, S. Walker, A. Ø. Hovland, A. Ohma, V. G. Merkin, K. A. Sorathia   +8 more
openaire   +4 more sources

Multi-instrument probing of the polar ionosphere under steady northward IMF [PDF]

Annales Geophysicae, 2000
Observations are presented of the polar ionosphere under steady, northward IMF. The measurements, made by six complementary experimental techniques, including radio tomography, all-sky and meridian scanning photometer optical imaging, incoherent and ...
S. E. Pryse, S. E. Pryse, S. E. Pryse, A. M. Smith, A. M. Smith, A. M. Smith, L. Kersley, L. Kersley, L. Kersley, I. K. Walker, I. K. Walker, I. K. Walker, C. N. Mitchell, C. N. Mitchell, J. Moen, J. Moen, J. Moen, R. W. Smith, R. W. Smith   +18 more
doaj   +1 more source

Results of numerical modelling of the problem of video pulse ground penetrating radar research in freshwater bodies

Russian Journal of Earth Sciences, 2022
Ground-penetrating radar profiling on the surface of water bodies is applied in various geological and engineering studies. Here, we present the results of numerical simulation of the propagation of a video pulse electromagnetic signal in a freshwater ...
Gulevich Oxana, Volkomirskaya Liudmila, Mingalev Igor, Varenkov Vladimir, Suvorova Zoya, Akhmetov Oleg, Mingalev Oleg, Gulevich Oxana   +7 more
doaj   +1 more source

A new method to reconstruct the ionospheric convection patterns in the polar cap [PDF]

Annales Geophysicae, 1999
A new method to reconstruct the instantaneous convection pattern in the Earth's polar ionosphere is suggested. Plasma convection in the polar cap ionosphere is described as a hydrodynamic incompressible flow.
P. L. Israelevich, P. L. Israelevich, A. I. Ershkovich   +2 more
doaj   +1 more source

A survey of magnetopause FTEs and associated flow bursts in the polar ionosphere [PDF]

Annales Geophysicae, 2000
Using the Equator-S spacecraft and SuperDARN HF radars an extensive survey of bursty reconnection at the magnetopause and associated flows in the polar ionosphere has been conducted.
D. A. Neudegg, D. A. Neudegg, D. A. Neudegg, S. W. H. Cowley, S. E. Milan, T. K. Yeoman, M. Lester, G. Provan, G. Haerendel, W. Baumjohann, B. Nikutowski, J. Büchner, U. Auster, K.-H. Fornacon, E. Georgescu, E. Georgescu   +15 more
doaj   +1 more source

Deformation of Ionospheric Potential Pattern by Ionospheric Hall Polarization [PDF]

Journal of Geophysical Research: Space Physics, 2019
AbstractThe present study shows that the ionospheric Hall polarization can deform the high‐latitude ionospheric convection field, which is widely considered to be a manifestation of the convection field in the magnetosphere. We perform the Hall polarization field separation with a potential solver by changing the conductance distribution step by step ...
Aoi, Nakamizo, Akimasa, Yoshikawa
openaire   +1 more source