Zobrazeno 1 - 10
of 29
pro vyhledávání: '"Sanni Hoilijoki"'
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
Autor:
Yann Pfau-Kempf, Markus Battarbee, Urs Ganse, Sanni Hoilijoki, Lucile Turc, Sebastian von Alfthan, Rami Vainio, Minna Palmroth
Publikováno v:
Frontiers in Physics, Vol 6 (2018)
In hybrid-Vlasov plasma modeling, the ion velocity distribution function is propagated using the Vlasov equation while electrons are considered a charge-neutralizing fluid. It is an alternative to particle-in-cell methods, one advantage being the abs
Externí odkaz:
https://doaj.org/article/f6a62d44372c45e9b4a9db9fd06d4499
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 Grandin, Hyunju K. Connor, Sanni Hoilijoki, Markus Battarbee, Yann Pfau-Kempf, Urs Ganse, Konstantinos Papadakis, Minna Palmroth
Solar wind charge exchange produces emissions in the soft X-ray energy range which can enable the study of near-Earth space regions such as the magnetopause, the magnetosheath and the polar cusps by remote sensing techniques. The Solar wind-Magnetosp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c06a20a0722aa1b01adf7ddb0487330b
http://arxiv.org/abs/2301.13325
http://arxiv.org/abs/2301.13325
Autor:
Laura Fryer, Robert Fear, Imogen Gingell, John Coxon, Minna Palmroth, Sanni Hoilijoki, Pekka Janhunen, Anita Kullen
We investigate the dynamic coupling between the solar wind and Earth’s magnetosphere during northward IMF conditions. The high latitude lobe regions of the magnetosphere during such conditions are generally characterised as containing cool, very lo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7a446e38cbdadaf3f721207233b2e3bd
https://doi.org/10.5194/egusphere-egu22-1177
https://doi.org/10.5194/egusphere-egu22-1177
Autor:
Urs Ganse, Yann Pfau-Kempf, Minna Palmroth, Sanni Hoilijoki, Riku Jarvinen, Andrew Dimmock, Markus Battarbee, Paul Cassak, Xochitl Blanco-Cano, Emilia Kilpua, Lucile Turc, David G. Sibeck, Robert Fear, Liisa Juusola
Publikováno v:
Journal of Geophysical Research: Space Physics
This paper describes properties and behavior of magnetic reconnection and flux transfer events (FTEs) on the dayside magnetopause using the global hybrid-Vlasov code Vlasiator. We investigate two simulation runs with and without a sunward (positive)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2650ebfa3823a146712ac18532894c0a
https://doi.org/10.1029/2019ja026821
https://doi.org/10.1029/2019ja026821
Autor:
Yann Pfau-Kempf, Minna Palmroth, Urs Ganse, Sanni Hoilijoki, Andrei Runov, Markus Battarbee, Maxime Grandin, Emilia Kilpua, Lucile Turc, Drew Turner, Sergio Toledo-Redondo, Heli Hietala
Publikováno v:
Annales Geophysicae
Annales Geophysicae, Vol 39, Pp 599-612 (2021)
Annales Geophysicae, Vol 39, Pp 599-612 (2021)
We present results of noon–midnight meridional plane global hybrid-Vlasov simulations of the magnetotail ion dynamics under a steady southward interplanetary magnetic field using the Vlasiator model. The simulation results show magnetotail reconnec
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f0b16299ff216ccebfa10a9bec6889eb
Autor:
Sanni Hoilijoki, Thiago Brito, Minna Palmroth, Liisa Juusola, Markus Battarbee, Urs Ganse, Riku Jarvinen, Maxime Grandin, Yann Pfau-Kempf, Lucile Turc
Publikováno v:
Journal of Geophysical Research: Space Physics
In this paper, we present a detailed study of the effects of the interplanetary magnetic field (IMF) strength on the foreshock properties at small and large scales. Two simulation runs performed with the hybrid-Vlasov code Vlasiator with identical se
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b02bcbdd15c89b7506b8dd069e4a35d1
https://doi.org/10.1029/2018ja025466
https://doi.org/10.1029/2018ja025466
Autor:
Paul Cassak, Minna Palmroth, Urs Ganse, Sanni Hoilijoki, Heli Hietala, Yann Pfau-Kempf, Brian Walsh, Sebastian von Alfthan
Publikováno v:
Journal of Geophysical Research: Space Physics
We present results from a first study of the local reconnection rate and reconnection site motion in a 2D-3V global magnetospheric self-consistent hybrid-Vlasov simulation with due southward interplanetary magnetic field. We observe magnetic reconnec
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0c60de4c41ca2c3c2a237c447cb63818
https://doi.org/10.1002/2016ja023709
https://doi.org/10.1002/2016ja023709
Autor:
Minna Palmroth, Urs Ganse, Yann Pfau-Kempf, Steve Milan, Sanni Hoilijoki, Sebastian von Alfthan, Heli Hietala, Liisa Juusola
Publikováno v:
Annales Geophysicae, Vol 34, Pp 943-959 (2016)
Annales Geophysicae
Annales Geophysicae
We present a scenario resulting in time-dependent behaviour of the bow shock and transient, local ion reflection under unchanging solar wind conditions. Dayside magnetopause reconnection produces flux transfer events driving fast-mode wave fronts in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::71f2d4c65e7cf3d036269a263181606d
https://www.ann-geophys.net/34/943/2016/angeo-34-943-2016.pdf
https://www.ann-geophys.net/34/943/2016/angeo-34-943-2016.pdf