Zobrazeno 1 - 10
of 36
pro vyhledávání: '"Harriet George"'
Autor:
Sydney Furman, Alexandros Chasapis, David Malaspina, Peter Tatum, Benjamin Short, Harriet George, Mihailo Martinović
Publikováno v:
The Astrophysical Journal Letters, Vol 976, Iss 1, p L1 (2024)
Several long-standing theories postulate that turbulent dissipation can heat solar wind protons in situ. Turbulent dissipation can occur via current sheets, which are small-scale structures embedded in the solar wind magnetic field. This study examin
Externí odkaz:
https://doaj.org/article/d45e4bece1924bd580f1e61e702f53e7
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:
Lucile Turc, Hongyang Zhou, Vertti Tarvus, Matti Ala-Lahti, Markus Battarbee, Yann Pfau-Kempf, Andreas Johlander, Urs Ganse, Maxime Dubart, Harriet George, Maxime Grandin, Konstantinos Horaites, Fasil Tesema, Jonas Suni, Markku Alho, Konstantinos Papadakis, Minna Palmroth
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 9 (2022)
Ultra-low frequency (ULF) waves in the Pc3 range, with periods between 10–45 s, are routinely observed in Earth’s dayside magnetosphere. They are thought to originate in the foreshock, which extends upstream of the quasi-parallel bow shock and is
Externí odkaz:
https://doaj.org/article/4415610f3b934334a522dd22587b72cf
Autor:
Hongyang Zhou, Lucile Turc, Yann Pfau-Kempf, Markus Battarbee, Vertti Tarvus, Maxime Dubart, Harriet George, Giulia Cozzani, Maxime Grandin, Urs Ganse, Markku Alho, Andreas Johlander, Jonas Suni, Maarja Bussov, Konstantinos Papadakis, Konstantinos Horaites, Ivan Zaitsev, Fasil Tesema, Evgeny Gordeev, Minna Palmroth
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 9 (2022)
Ultra-low frequency (ULF) waves are routinely observed in Earth’s dayside magnetosphere. Here we investigate the influence of externally-driven density variations in the near-Earth space in the ULF regime using global 2D simulations performed with
Externí odkaz:
https://doaj.org/article/cfc565e899954af6a9d1ed6435e8bae8
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:
Konstantinos Papadakis, Yann Pfau-Kempf, Urs Ganse, Markus Battarbee, Markku Alho, Maxime Grandin, Maxime Dubart, Lucile Turc, Hongyang Zhou, Konstantinos Horaites, Ivan Zaitsev, Giulia Cozzani, Maarja Bussov, Evgeny Gordeev, Fasil Tesema, Harriet George, Jonas Suni, Vertti Tarvus, Minna Palmroth
Publikováno v:
Geoscientific Model Development. 15:7903-7912
Numerical simulation models that are used to investigate the near-Earth space plasma environment require sophisticated methods and algorithms as well as high computational power. Vlasiator 5.0 is a hybrid-Vlasov plasma simulation code that is able to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dc3f5c6b0867cf2ae2e0bb754f2ea782
https://doi.org/10.5194/gmd-15-7903-2022
https://doi.org/10.5194/gmd-15-7903-2022
Autor:
Yann Pfau-Kempf, Urs Ganse, Konstantinos Papadakis, Markku Alho, Markus Battarbee, Giulia Cozzani, Maxime Dubart, Harriet George, Evgeniy Gordeev, Maxime Grandin, Konstantinos Horaites, Leo Kotipalo, Jonas Suni, Vertti Tarvus, Fasil Tesema, Lucile Turc, Ivan Zaitsev, Hongyang Zhou, Minna Palmroth
Vlasiator, the global hybrid-Vlasov model of the terrestrial magnetosphere, now features a coupled ionosphere model replacing the previous, perfectly conducting inner boundary. Following a well-established approach, densities, temperatures and field-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6b2386c8509ec54503362f8b3c52a6c8
https://doi.org/10.5194/egusphere-egu23-1390
https://doi.org/10.5194/egusphere-egu23-1390
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:
Jonas Suni, Minna Palmroth, Markus Battarbee, Lucile Turc, Markku Alho, Giulia Cozzani, Maxime Dubart, Urs Ganse, Harriet George, Evgeny Gordeev, Maxime Grandin, Konstantinos Horaites, Konstantinos Papadakis, Yann Pfau-Kempf, Vertti Tarvus, Fasil Tesema, Ivan Zaitsev, Hongyang Zhou
Magnetosheath jets are a class of phenomena that are usually defined as structures of enhanced dynamic pressure in the magnetosheath. The origins of some jets have been traced back to steepening ULF waves in the foreshock, but other formation mechani
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5f80e69e7e25af28bb9bd1ba0ffedcbc
https://doi.org/10.5194/egusphere-egu23-1222
https://doi.org/10.5194/egusphere-egu23-1222
Autor:
Jonas Suni, Minna Palmroth, Lucile Turc, Markus Battarbee, Giulia Cozzani, Maxime Dubart, Urs Ganse, Harriet George, Evgeny Gordeev, Konstantinos Papadakis, Yann Pfau-Kempf, Vertti Tarvus, Fasil Tesema, Hongyang Zhou
Magnetosheath jets are plasma structures that are characterised by enhanced dynamics pressure and/or plasma velocity. A jet generation mechanism that has been widely discussed in observational and numerical studies is steepened Ultra Low Frequency (U
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4845aa750e9743e85eb56194fe611cb5
https://angeo.copernicus.org/preprints/angeo-2023-14/
https://angeo.copernicus.org/preprints/angeo-2023-14/