Zobrazeno 1 - 10
of 73
pro vyhledávání: '"Adnane Osmane"'
Autor:
Oliver Allanson, Donglai Ma, Adnane Osmane, Jay M. Albert, Jacob Bortnik, Clare E. J. Watt, Sandra C. Chapman, Joseph Spencer, Daniel J. Ratliff, Nigel P. Meredith, Thomas Elsden, Thomas Neukirch, David P. Hartley, Rachel Black, Nicholas W. Watkins, Sean Elvidge
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 11 (2024)
Quasilinear theories have been shown to well describe a range of transport phenomena in magnetospheric, space, astrophysical and laboratory plasma “weak turbulence” scenarios. It is well known that the resonant diffusion quasilinear theory for th
Externí odkaz:
https://doaj.org/article/6412a26bbcba4276a29df5ad318ee67c
Publikováno v:
The Astrophysical Journal Letters, Vol 946, Iss 1, p L19 (2023)
We have investigated how the degree of imbalance in solar wind turbulence is modified by large-scale velocity shears in the solar wind plasma. The balance between counterpropagating Alfvénic fluctuations, which interact nonlinearly to generate the t
Externí odkaz:
https://doaj.org/article/7d37bc13158f45e8b30f83e19fb4d517
Autor:
Sanni Hoilijoki, Emilia K. J. Kilpua, Adnane Osmane, Milla M. H. Kalliokoski, Harriet George, Mikko Savola, Timo Asikainen
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 9 (2022)
In this study, we use mutual information from information theory to investigate non-linear correlation between geomagnetic activity indicated by auroral electrojet (AE) index with both the global ultra low frequency (ULF) Pc5 wave power and medium en
Externí odkaz:
https://doaj.org/article/134f8ddfc76f45a18f5eea738f644b55
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 269, Iss 2, p 44 (2023)
Observational studies of the Earth’s radiation belts indicate that Alfvénic fluctuations in the frequency range of 2–25 mHz accelerate electrons to relativistic energies. For decades, statistical models of radiation belts have quantified the imp
Externí odkaz:
https://doaj.org/article/485b12bde6884dcfa6cd464e1b59d237
Cross helicity quantifies the balance between counterpropagating Alfvénic fluctuations, which interact nonlinearly to generate turbulence in the solar wind. We have investigated how cross helicity is modified by large-scale velocity shears in the so
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4c2d90753aeb48de9d5e28c2dcf5b63c
https://doi.org/10.5194/egusphere-egu23-13050
https://doi.org/10.5194/egusphere-egu23-13050
Autor:
Sanni Hoilijoki, Veera Lipsanen, Adnane Osmane, Milla Kalliokoski, Harriet George, Lucile Turc, Emilia Kilpua
Solar wind variations and transients are the main driver of the dynamics of the Earth’s magnetosphere. Interplanetary coronal mass ejections (ICME) cause the largest variations in the near-Earth space, but significant geomagnetic activity can also
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6a7ed4e617ccde75911d39fd15f14736
https://doi.org/10.5194/egusphere-egu23-8906
https://doi.org/10.5194/egusphere-egu23-8906
Autor:
Maxime Dubart, Markus Battarbee, Urs Ganse, Adnane Osmane, Felix Spanier, Markku Alho, Giulia Cozzani, Maarja Bussov, Konstantinos Horaites, Yann Pfau-Kempf, Jonas Suni, Vertti Tarvus, Lucile Turc, Ivan Zaitsev, Hongyang Zhou, Minna Palmroth
Pitch-angle diffusion is one of the main processes of isotropisation of ions in the Earth's magnetosheath. It results from the proton cyclotron and mirror instabilities, arising from temperature anisotropy in the magnetosheath, and is governed by the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d9d19eb1b2be312fef09c786299ac232
https://doi.org/10.5194/egusphere-egu23-6680
https://doi.org/10.5194/egusphere-egu23-6680
There is a growing body of observational, theoretical and experimental evidence to indicate that a proper description of radiation belt charged particle transport will require new mathematical models, i.e. new partial differential equations. One lead
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eda8aa88a88b14222e0ce245e365ecf3
https://doi.org/10.5194/egusphere-egu23-8925
https://doi.org/10.5194/egusphere-egu23-8925
Autor:
Adnane Osmane
Radial diffusion in planetary radiation belts is a dominant transport mechanism resulting in the energisation and loss processes of charged particles by ultra-low frequency (ULF) fluctuations in the Pc4-Pc5 range. The theoretical framework upon which
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d1717567a38b0106db9ce28fc4342ef2
https://doi.org/10.5194/egusphere-egu23-5242
https://doi.org/10.5194/egusphere-egu23-5242
Fast coronal mass ejections (CMEs) drive shock waves ahead of them. The turbulent sheath region between the shock and the CME itself contains magnetic field and velocity fluctuations on a broad spectrum of frequencies. In this work we aim to characte
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::33f2fefd829dc1be1ce2511ee75c3a3f
https://doi.org/10.5194/egusphere-egu22-11945
https://doi.org/10.5194/egusphere-egu22-11945