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Journal Article

Atmospheric escape from the Earth during geomagnetic reversal


Dubinin,  E. M.
Department Planets and Comets, Max Planck Institute for Solar System Research, Max Planck Society;

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Tsareva, O. O., Dubinin, E. M., Malova, H. V., Popov, V. Y., & Zelenyi, L. M. (2020). Atmospheric escape from the Earth during geomagnetic reversal. Annals of Geophysics, 63(2): PA222. doi:10.4401/ag-8354.

Cite as: http://hdl.handle.net/21.11116/0000-0006-F514-F
We considered basic mechanisms of atmospheric particle acceleration and estimated the escape rates of ionospheric ions (H+ and O+) during the geomagnetic field reversal. It is assumed that during the reversal the Earth's magnetic field deviates from the current dipole configuration, and the quadrupole component dominates. The standoff distance of the quadrupole magnetosphere is about of 3 Earth's radii and therefore a magnetic shielding protects the atmosphere from sputtering and ion pickup but not from the polar and auroral winds.