Bibliography
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Found 3 entries in the Bibliography.
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2017 |
The effect of solar illumination on ion outflow from the polar ionosphere The goal of this thesis is to analyze how the fluxes of ions that flow out of the ionosphere in Earth’s polar regions are affected by solar illumination. An atmosphere constantly leaks Published by: Published on: |
2015 |
Solar illumination control of ionospheric outflow above polar cap arcs We measure the flux density, composition, and energy of outflowing ions above the polar cap, accelerated by quasi-static electric fields parallel to the magnetic field and associated with polar cap arcs, using Cluster. Mapping the spacecraft position to its ionospheric foot point, we analyze the dependence of these parameters on the solar zenith angle (SZA). We find a clear transition at SZA between \~94\textdegree and \~107\textdegree, with the O+ flux higher above the sunlit ionosphere. This dependence on the illumination of the local ionosphere indicates that significant O+ upflow occurs locally above the polar ionosphere. The same is found for H+, but to a lesser extent. This effect can result in a seasonal variation of the total ion upflow from the polar ionosphere. Furthermore, we show that low-magnitude field-aligned potential drops are preferentially observed above the sunlit ionosphere, suggesting a feedback effect of ionospheric conductivity. Maes, L.; Maggiolo, R.; De Keyser, J.; Dandouras, I.; Fear, R.; Fontaine, D.; Haaland, S.; Published by: Geophysical Research Letters Published on: 03/2015 YEAR: 2015   DOI: 10.1002/2014GL062972 cold ion outflow; ion upflow; polar cap arc; polar ionosphere; polar wind; solar illumination |
2014 |
Maggiolo, Romain; Fontaine, Dominique; Hosokawa, Keisuke; Maes, Lukas; Zhang, Yongliang; Fear, Robert; Cumnock, Judy; Kozlovsky, Alexander; Kullen, Anita; Milan, Steve; , others; Published by: Published on: |
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