Loading-unloading processes in the nightside ionosphere

Tutkimustuotos: Lehtiartikkelivertaisarvioitu

Tutkijat

Organisaatiot

  • Finnish Meteorological Institute
  • NASA Goddard Space Flight Center

Kuvaus

The loading-unloading processes during magnetospheric substorms are examined using the 'IL index' from the IMAGE magnetometer chain together with solar wind and IMF data from the WIND spacecraft. The IL index is a local, midnight sector, AL index. Energy input throughout the substorm is evaluated by integrating the epsilon parameter from the start of the growth phase until the end of the substorm. Energy dissipated in the ionosphere is estimated by integrating the IL index from the substorm onset to the end of the substorm. We show that the best correlation with the energy dissipated in the ionosphere is given by the energy input to the system after the substorm onset. Hence, we con elude that the energy loaded during the growth phase is necessary for the magnetospheric reconfiguration before the substorm onset, but that the size of the substorm as measured by the IL index is mostly governed by the direct energy input during the expansion phase.

Yksityiskohdat

AlkuperäiskieliEnglanti
Sivut1627-1630
Sivumäärä4
JulkaisuGeophysical Research Letters
Vuosikerta27
Numero11
TilaJulkaistu - 1 kesäkuuta 2000
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

ID: 2859291