Hysteresis in solar wind power input to the magnetosphere

Minna Palmroth*, Pekka Janhunen, Tuija I. Pulkkinen

*Tämän työn vastaava kirjoittaja

Tutkimustuotos: LehtiartikkeliArticleScientificvertaisarvioitu

Abstrakti

We examine the clock angle dependence of the solar wind power input into the magnetosphere using the Grand Unified Magnetosphere Ionosphere Coupling Simulation (GUMICS-4). We compute the power input through the magnetopause systematically in four events where the solar wind parameters are otherwise kept constant, but the interplanetary magnetic field ( IMF) clock angle theta is rotated from 0 degrees to 360 degrees. We find that when the clock angle rotates from north to south, the power input is well represented by sin(2)(theta/2). However, during the return rotation from south to north, the power input in the simulation remains enhanced longer than a sin(2)(theta/2) dependence would indicate. We suggest that the enhanced energy input during the return rotation may be a consequence of the nature of the reconnection process at the magnetopause.

AlkuperäiskieliEnglanti
Artikkeli03107
Sivumäärä4
JulkaisuGeophysical Research Letters
Vuosikerta33
Numero3
DOI - pysyväislinkit
TilaJulkaistu - 14 helmikuuta 2006
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

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