Papers on Ionosphere and Upper Atmosphere
Helium escape from the terrestrial atmosphere: The ion outflow mechanism
Article first published online: 20 SEP 2012
Copyright 1996 by the American Geophysical Union.
Journal of Geophysical Research: Space Physics (1978–2012)
Volume 101, Issue A2, pages 2435–2443, 1 February 1996
How to Cite
1996), Helium escape from the terrestrial atmosphere: The ion outflow mechanism, J. Geophys. Res., 101(A2), 2435–2443, doi:10.1029/95JA02208., and (
- Issue published online: 20 SEP 2012
- Article first published online: 20 SEP 2012
- Manuscript Accepted: 17 JUL 1995
- Manuscript Received: 22 SEP 1994
We have computed global He+ escape fluxes for a range and a variety of diurnal, seasonal, universal time, and solar activity geophysical conditions. We average over the short-term variables and compute the globally averaged escape flux for a range of cutoff latitudes, which separate regions of open and closed field lines, during one solar cycle. The global escape flux averaged over a solar cycle was computed, and we find that a cutoff latitude of about 60° or lower is sufficient to balance the outgassing from the Earth's crust.