Topside-protonosphere ion fractions responses to solar and geomagnetic activity over the Arecibo Observatory
Abstract
In this work, we are comparing incoherent scatter radar data for H+, He+ and O+ ion fractions for the months of June solstice (May, June, July, and August) of 1998 and 2000 in respect to solar flux and geomagnetic variations. Due to the strait dependence of the response of the ion fractions with solar and geomagnetic variations, we isolated the real contribution of these parameters by local time and altitude as variation rates. Preliminary results demonstrate the altitude range studied (350 to 1250km) where there is a positive (negative) response of the ion O+ (H+) with the variation of solar flux while the dependence of He+ rates presented three different behaviors in altitude dependents of time, i.e., detected two regions of behavior inversion. Additionally, we found evidence of a small layer formation of He+ soon after the local midnight in altitudes around 875km with increased geomagnetic activity. A strong dependence with geomagnetic variation was detected for the ions of H and O post-midnight generating two layers. However, these layers were detected at different altitudes far from each other of about ~ 340km.
- Publication:
-
43rd COSPAR Scientific Assembly. Held 28 January - 4 February
- Pub Date:
- January 2021
- Bibcode:
- 2021cosp...43E.616M