Zobrazeno 1 - 10
of 20
pro vyhledávání: '"Milla Kalliokoski"'
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
Autor:
Maxime Grandin, Minna Palmroth, Graeme Whipps, Milla Kalliokoski, Mark Ferrier, Larry J. Paxton, Martin G. Mlynczak, Jukka Hilska, Knut Holmseth, Kjetil Vinorum, Barry Whenman
Publikováno v:
AGU Advances, Vol 2, Iss 2, Pp n/a-n/a (2021)
Abstract Recently, citizen scientist photographs led to the discovery of a new auroral form called “the dune aurora” which exhibits parallel stripes of brighter emission in the green diffuse aurora at about 100 km altitude. This discovery raised
Externí odkaz:
https://doaj.org/article/0a7bc755444840dd86cd3895c651fc1d
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:
Harriet George, Milla Kalliokoski
Radial diffusion coefficients quantify non-adiabatic transport of energetic particles by electromagnetic field fluctuations in planetary radiation belts. Theoretically, radial diffusion occurs for an ensemble of particles that experience irreversible
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f2dcf1461125122b1f3e00169b852077
https://doi.org/10.5194/egusphere-egu22-4497
https://doi.org/10.5194/egusphere-egu22-4497
Autor:
Mikko Savola, Milla Kalliokoski, Hannu Koskinen, Joseph E. Borovsky, Emilia Kilpua, Adnane Osmane
Publikováno v:
Annales Geophysicae, Vol 40, Pp 37-53 (2022)
In this study, we use mutual information to characterise statistical dependencies of seed and relativistic electron fluxes in the Earth's radiation belts on ultra-low-frequency (ULF) wave power measured on the ground and at geostationary orbit. The b
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ce2a7c8a4e512f3cadf6be16f459e633
http://hdl.handle.net/10138/340086
http://hdl.handle.net/10138/340086
Autor:
Sanni Hoilijoki, Emilia Kilpua, Adnane Osmane, Milla Kalliokoski, Harriet George, Mikko Savola, Timo Asikainen
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://explore.openaire.eu/search/publication?articleId=doi_dedup___::d908935ba3ff4a665f63c3782ce66aaf
http://urn.fi/urn:nbn:fi-fe2023062157389
http://urn.fi/urn:nbn:fi-fe2023062157389
We describe the use of information-theoretic methodologies to characterise statistical dependencies of energetic electron fluxes (130 keV and >1 MeV) with a wide range of solar wind and magnetospheric drivers. We focus specifically on drivers associa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::99fdec82c75bdca856a28fc46d3c9757
https://doi.org/10.5194/egusphere-egu21-11390
https://doi.org/10.5194/egusphere-egu21-11390
Autor:
Harriet George, Urs Ganse, Maxime Dubart, Maarja Bussov, Maxime Grandin, Andreas Johlander, Jonas Suni, Emilia Kilpua, Adnane Osmane, Yann Pfau-Kempf, Solene Lejosne, Minna Palmroth, Lucile Turc, Markus Battarbee, Hongyang Zhou, Markku Alho, Konstantinos Papadakis, Milla Kalliokoski
The relative importance of radial diffusion and local acceleration to the dynamics of outer radiation belt electron populations is an open question in radiation belt physics. A key component of this discussion is the calculation of the radial diffusi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::31ca5d7b392deefc06d64ca097acbd68
https://doi.org/10.5194/egusphere-egu21-9850
https://doi.org/10.5194/egusphere-egu21-9850
Autor:
Martin G. Mlynczak, Milla Kalliokoski, Minna Palmroth, Mark Ferrier, Larry J. Paxton, Knut Holmseth, Maxime Grandin, Jukka Hilska, Graeme Whipps, Kjetil Vinorum, Barry Whenman
Recently, citizen scientist photographs led to the discovery of a new auroral form called "the dune aurora" which exhibits parallel stripes of brighter emission in the green diffuse aurora at about 100 km altitude. This discovery raised several quest
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4c8ea1164ffacbe7761590c74af14aea
https://doi.org/10.5194/egusphere-egu21-5986
https://doi.org/10.5194/egusphere-egu21-5986
Autor:
Drew Turner, Adnane Osmane, Emilia Kilpua, Allison Jaynes, Minna Palmroth, Lucile Turc, Milla Kalliokoski, Harriet George
Publikováno v:
Annales Geophysicae
Annales Geophysicae, Vol 38, Pp 683-701 (2020)
Annales Geophysicae, Vol 38, Pp 683-701 (2020)
The energetic electron content in the Van Allen radiation belts surrounding the Earth can vary dramatically at several timescales, and these strong electron fluxes present a hazard for spacecraft traversing the belts. The belt response to solar wind
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9efb5930d09b283c6c443dd1524f393c
http://hdl.handle.net/10138/318375
http://hdl.handle.net/10138/318375