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MLT Dependence in the Relationship between Plasmapause, Solar Wind and Geomagnetic Activity Based on CRRES and THEMIS - the Newest Results (CROSBI ID 643931)

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Verbanac, Giuliana ; Bandić, Mario ; Pierrard, Viviane MLT Dependence in the Relationship between Plasmapause, Solar Wind and Geomagnetic Activity Based on CRRES and THEMIS - the Newest Results // XIVth Hvar Astrophysical Colloquium Solar and Solar-Terrestrial Physics : Now and in the future : abstracts, p. 56. 2016. str. 1-2

Podaci o odgovornosti

Verbanac, Giuliana ; Bandić, Mario ; Pierrard, Viviane

engleski

MLT Dependence in the Relationship between Plasmapause, Solar Wind and Geomagnetic Activity Based on CRRES and THEMIS - the Newest Results

Using database of CRRES, CLUSTER, and THEMIS in situ observations of the plasmapause crossings, we develop linear and more complex plasmapause models parametrized by (a) solar wind parameters V (solar wind velocity), BV (where B is the magnitude of the interplanetary magnetic field IMF), and $dΦ/dt$ (which combines different physical mechanisms which run magnetospheric activity), and (b) geomagnetic indices Dst, Ap and AE. The complex models are built by including a first harmonic in MLT. We present results of the cross correlation analyses which provides both the plasmapause shape for different levels of geomagnetic activity (and thus of the magnetospheric convection electric field) and the information of the delays in the MLT response of the plasmapause. The MLT position of the maximal plasmapause extension obtained from CLUSTER, CRRES and THEMIS satellites are discussed and also compared with past works. Based on our results we suggest that the plasmapause is formed by the mechanism of interchange instability motion and that the instability likely propagates much faster during solar maximum than around solar minimum.

plasmapause, solar wind, geomagnetic indices, CRESS, THEMIS, CLUSTER satellites

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Podaci o prilogu

1-2.

2016.

objavljeno

Podaci o matičnoj publikaciji

XIVth Hvar Astrophysical Colloquium Solar and Solar-Terrestrial Physics : Now and in the future : abstracts, p. 56

Podaci o skupu

Hvar Astrophysical Colloquium Solar and Solar-Terrestrial Physics : Now and in the future (14: 2016)

poster

26.09.2016-29.09.2016

Hvar, Hrvatska

Povezanost rada

Fizika, Geologija