Počet záznamů: 1  

EMIC wave properties according to their distance to the magnetopause

  1. 1.
    SYSNO ASEP0538855
    Druh ASEPA - Abstrakt
    Zařazení RIVZáznam nebyl označen do RIV
    Zařazení RIVNení vybrán druh dokumentu
    NázevEMIC wave properties according to their distance to the magnetopause
    Tvůrce(i) Grison, Benjamin (UFA-U) RID, ORCID
    Celkový počet autorů1
    Zdroj.dok.AGU Fall Meeting. - : American Geophysical Union, 2020
    SM034-0008
    Poč.str.1 s.
    Forma vydáníOnline - E
    AkceAGU Fall Meeting 2020
    Datum konání01.12.2020 - 17.12.2020
    Místo konáníonline everywhere
    ZeměUS - Spojené státy americké
    Typ akceWRD
    Jazyk dok.eng - angličtina
    Země vyd.US - Spojené státy americké
    Klíč. slovamagnetopause ; electromagnetic ion cyclotron (EMIC) emissions ; THEMIS spacecraft
    Vědní obor RIVBL - Fyzika plazmatu a výboje v plynech
    Obor OECDFluids and plasma physics (including surface physics)
    Institucionální podporaUFA-U - RVO:68378289
    AnotaceWave particle interactions play an important role in the magnetosphere dynamics. ElectroMagnetic ion cyclotron (EMIC) waves are one of the kind of plasma waves involved in these interactions. After the first in situ observations of EMIC waves close to the plasmapause, many statistical studies pointed out that the dayside magnetosphere region close to the magnetopause is the place where the EMIC occurrence rate is the highest. In this region the EMIC wave occurrence is related to magnetosphere compression events, in relation with solar wind kinetic pressure increases.
    Mapping of EMIC waves in the dayside magnetosphere are usually performed according to the L-shell value of the observations (the L-shell value of a location in the magnetosphere being the distance to the Earth). It is more difficult to investigate the wave occurrence rates according to their distance to the magnetopause because the magnetopause position is not precisely known at a given time. Considering a magnetopause model allows to get around this difficulty.
    The considered EMIC wave events are the ones gathered by Usanova et al. (2012) based on Flux Gate Magnetometers measurements onboard THEMIS spacecraft and the magnetopause position is given by the Shue et al. model (1998). EMIC waves are found to maximize in the vicinity of the magnetopause (within 2 Earth radii), in the morning and noon magnetic local time (MLT) sectors. Dependence of EMIC wave parameters (wave normal angle, ellipticity, and degree of polarization) on the distance to the magnetopause and on the magnetic latitude of the observations are compared to the EMIC wave occurrence rates in order to estimate the location of wave amplification region.
    PracovištěÚstav fyziky atmosféry
    KontaktKateřina Adamovičová, adamovicova@ufa.cas.cz, Tel.: 272 016 012 ; Kateřina Potužníková, kaca@ufa.cas.cz, Tel.: 272 016 019
    Rok sběru2021
Počet záznamů: 1  

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