Kinetic modeling of the polar wind

S. W.Y. Tam, T. Chang, V. Pierrard

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

The polar wind, a plasma outflow along open geomagnetic field lines from the Earth's ionosphere, has been the subject of many theoretical studies. Since the proposal of its existence more than 30 years ago, the polar wind has been described by various theoretical modeling approaches. In this paper, we first describe the two traditional modeling approaches for the classical polar wind: moment-based models and collisionless kinetic calculations; and discuss how other models of the outflow were formed by combining these two traditional approaches. We then discuss how kinetic calculations have been improved to take into account the effects of Coulomb collisions, which may contribute to the formation of double-peaked H+ velocity distributions in the polar wind. As observations of escaping O+ fluxes have guided theoreticians to go beyond the classical polar wind description, we discuss how models were modified or constructed in order to take into account the various non-classical effects, including those due to photoelectrons, which may also provide an explanation for the satellite observations of day-night asymmetries in addition to the acceleration of the O+ ions.

Original languageEnglish
Pages (from-to)1984-2027
Number of pages44
JournalJournal of Atmospheric and Solar-Terrestrial Physics
Volume69
Issue number16
DOIs
Publication statusPublished - 2007 Nov 1

Fingerprint

kinetics
modeling
outflow
Earth ionosphere
Coulomb collisions
satellite observation
geomagnetism
theoretical study
geomagnetic field
night
proposals
ionosphere
asymmetry
photoelectrons
velocity distribution
collision
moments
plasma
ion
ions

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Atmospheric Science
  • Space and Planetary Science

Cite this

Tam, S. W.Y. ; Chang, T. ; Pierrard, V. / Kinetic modeling of the polar wind. In: Journal of Atmospheric and Solar-Terrestrial Physics. 2007 ; Vol. 69, No. 16. pp. 1984-2027.
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Kinetic modeling of the polar wind. / Tam, S. W.Y.; Chang, T.; Pierrard, V.

In: Journal of Atmospheric and Solar-Terrestrial Physics, Vol. 69, No. 16, 01.11.2007, p. 1984-2027.

Research output: Contribution to journalArticle

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