Helium escape from the terrestrial atmosphere: The ion outflow mechanism

Details Helium escape from the terrestrial atmosphere: The ion outflow mechanism Helium escape from the terrestrial atmosphere: The ion outflow mechanism

Feb 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996jgr...101.2435l&link_type=abstract

Journal of Geophysical Research, Volume 101, Issue A2, p. 2435-2444

Physics

3

Ionosphere: Polar Cap Ionosphere, Ionosphere: Ionosphere/Magnetosphere Interactions, Atmospheric Composition And Structure: Evolution Of The Atmosphere

Scientific paper

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.

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