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Statements

Subject Item
n2:RIV%2F00216208%3A11320%2F11%3A10108248%21RIV12-GA0-11320___
rdf:type
skos:Concept n15:Vysledek
rdfs:seeAlso
http://dx.doi.org/10.1016/j.jastp.2010.05.017
dcterms:description
An important problem of the Space Weather Program is the interaction of interplanetary (IP) shocks with Earth's magnetosphere because their interaction often (but not always) leads to major geomagnetic storms. Since the huge interaction region can be covered by simultaneous spacecraft observations only sporadically, global MHD modeling can help in our understanding of the interaction process. We have developed a procedure that clearly distinguished magnetospheric boundaries in an output of the global MHD model and compare its results to spacecraft observations. Using one IP shock observed by Geotail, we compare its passage through the magnetosphere with predictions of two modifications of the global BATS-R-US MHD code. We demonstrate the complexity of the shock interaction with the bow shock, magnetopause, and oscillations of the whole system toward a new equilibrium state with a duration of 10-12 min. Moreover, based on the changes of the magnetopause and bow shock locations in the nightside region, we suggest that the information about the IP shock hitting the subsolar magnetopause reaches the nightside magnetopause earlier than the IP shock can arrive. This information is, in our view, mediated by fast magnetosonic waves in the inner magnetosphere. Although we have found generally a good agreement, we discuss possible sources of deviations of modeled and observed locations of the boundaries. An important problem of the Space Weather Program is the interaction of interplanetary (IP) shocks with Earth's magnetosphere because their interaction often (but not always) leads to major geomagnetic storms. Since the huge interaction region can be covered by simultaneous spacecraft observations only sporadically, global MHD modeling can help in our understanding of the interaction process. We have developed a procedure that clearly distinguished magnetospheric boundaries in an output of the global MHD model and compare its results to spacecraft observations. Using one IP shock observed by Geotail, we compare its passage through the magnetosphere with predictions of two modifications of the global BATS-R-US MHD code. We demonstrate the complexity of the shock interaction with the bow shock, magnetopause, and oscillations of the whole system toward a new equilibrium state with a duration of 10-12 min. Moreover, based on the changes of the magnetopause and bow shock locations in the nightside region, we suggest that the information about the IP shock hitting the subsolar magnetopause reaches the nightside magnetopause earlier than the IP shock can arrive. This information is, in our view, mediated by fast magnetosonic waves in the inner magnetosphere. Although we have found generally a good agreement, we discuss possible sources of deviations of modeled and observed locations of the boundaries.
dcterms:title
MHD analysis of propagation of an interplanetary shock across magnetospheric boundaries MHD analysis of propagation of an interplanetary shock across magnetospheric boundaries
skos:prefLabel
MHD analysis of propagation of an interplanetary shock across magnetospheric boundaries MHD analysis of propagation of an interplanetary shock across magnetospheric boundaries
skos:notation
RIV/00216208:11320/11:10108248!RIV12-GA0-11320___
n15:predkladatel
n22:orjk%3A11320
n3:aktivita
n13:P n13:Z
n3:aktivity
P(GA205/09/0112), Z(MSM0021620860)
n3:cisloPeriodika
1
n3:dodaniDat
n8:2012
n3:domaciTvurceVysledku
n16:1504126 n16:5876265 n16:3178129
n3:druhVysledku
n9:J
n3:duvernostUdaju
n7:S
n3:entitaPredkladatele
n19:predkladatel
n3:idSjednocenehoVysledku
212262
n3:idVysledku
RIV/00216208:11320/11:10108248
n3:jazykVysledku
n18:eng
n3:klicovaSlova
magnetospheric boundaries; interplanetary shock; MHD analysis
n3:klicoveSlovo
n4:magnetospheric%20boundaries n4:MHD%20analysis n4:interplanetary%20shock
n3:kodStatuVydavatele
GB - Spojené království Velké Británie a Severního Irska
n3:kontrolniKodProRIV
[64D8A6A0A1C6]
n3:nazevZdroje
Journal of Atmospheric and Solar-Terrestrial Physics
n3:obor
n20:BL
n3:pocetDomacichTvurcuVysledku
3
n3:pocetTvurcuVysledku
5
n3:projekt
n14:GA205%2F09%2F0112
n3:rokUplatneniVysledku
n8:2011
n3:svazekPeriodika
73
n3:tvurceVysledku
Merka, J. Koval, A. Šafránková, Jana Přech, Lubomír Němeček, Zdeněk
n3:wos
000287073100003
n3:zamer
n12:MSM0021620860
s:issn
1364-6826
s:numberOfPages
10
n21:doi
10.1016/j.jastp.2010.05.017
n17:organizacniJednotka
11320