Počet záznamů: 1
Distribution of EMIC wave event locations depending on their distance from the magnetopause
- 1.
SYSNO ASEP 0489539 Druh ASEP A - Abstrakt Zařazení RIV Záznam nebyl označen do RIV Zařazení RIV Není vybrán druh dokumentu Název Distribution of EMIC wave event locations depending on their distance from the magnetopause Tvůrce(i) Grison, Benjamin (UFA-U) RID, ORCID
Hanzelka, Miroslav (UFA-U) ORCID, RID
Basovník, Marek (UFA-U) RID
Usanova, M. (US)
Souček, Jan (UFA-U) RID, ORCID
Santolík, Ondřej (UFA-U) RID, ORCIDCelkový počet autorů 6 Zdroj.dok. Geophysical Research Abstracts, EGU General Assembly 2018, Vol. 20. - Göttingen : European Geosciences Union, 2018
EGU2018-4367-1, s. 15662Poč.str. 1 s. Forma vydání Online - E Akce EGU General Assembly 2018 Datum konání 08.04.2018 - 13.04.2018 Místo konání Vienna Země AT - Rakousko Typ akce WRD Jazyk dok. eng - angličtina Země vyd. DE - Německo Klíč. slova magnetosphere ; electromagnetic ion cyclotron (EMIC) ; plasma waves Vědní obor RIV BL - Fyzika plazmatu a výboje v plynech Obor OECD Fluids and plasma physics (including surface physics) Institucionální podpora UFA-U - RVO:68378289 Anotace Wave 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. Afterthefirstinsituobservations 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 EMICwaveoccurrenceisrelatedtomagnetospherecompressionevents,inrelationwithsolarwindkineticpressure increases. ThepresentationoftheEMICoccurrencerateisusuallymadewithrespecttotheL-shellvalueoftheobservations (theL-shellvalueofalocationinthemagnetospherebeingthedistancetotheEarth(inEarthradii),inthemagnetic equatorial plane, of the magnetic field line passing through this location). The L-shell value of the region adjacent to the magnetopause can vary by few Earth radii in respect with the solar pressure. InthepresentstudyweproposetorepresenttheEMICwaveoccurrenceinthedaysidemagnetospherewithrespect to the distance from the magnetopause. This provides a new insight of the EMIC wave distribution in this region and a better understanding of the magnetosphere compression influence on the EMIC wave onset. The THEMIS mission offers the best data set for this: THEMIS instruments observed EMIC emissions in this region and the the orbits of the spacecraft (THEMIS/C, D, E and to a lower extent A) often cross the region of interest, including the magnetopause. The magnetopause position is estimated with the Shue et al. model (1998) and compared to the observed position, when possible. We propose here to present in detail our method and the first results of the EMIC occurrence rate in function of their distance to the magnetopause. Our study is based on EMIC waves events by Usanova et al. (2012) based on FluxGateMagnetometersmeasurementsonboardTHEMISspacecraft.Theinfluenceofthesolarwindpressureis also discussed. Pracoviště Ústav fyziky atmosféry Kontakt Kateřina Adamovičová, adamovicova@ufa.cas.cz, Tel.: 272 016 012 ; Kateřina Potužníková, kaca@ufa.cas.cz, Tel.: 272 016 019 Rok sběru 2019
Počet záznamů: 1