Articles | Volume 35, issue 3
Ann. Geophys., 35, 721–731, 2017
https://doi.org/10.5194/angeo-35-721-2017
Ann. Geophys., 35, 721–731, 2017
https://doi.org/10.5194/angeo-35-721-2017

Regular paper 12 Jun 2017

Regular paper | 12 Jun 2017

Atmospheric loss from the dayside open polar region and its dependence on geomagnetic activity: implications for atmospheric escape on evolutionary timescales

Rikard Slapak et al.

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Short summary
In this study, we have used Cluster satellite data to quantify the ionospheric oxygen ion (O+) escape into the solar wind and its dependence on geomagnetic activity. During times of high activity, the escape may be 2 orders of magnitude higher than under quiet conditions, strongly suggesting that the escape rate was much higher when the Sun was young. The results are important for future studies regarding atmospheric loss over geological timescales.