GUVI Biblio





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Found 4 entries in the Bibliography.


Showing entries from 1 through 4


2020

Aurora in the Polar Cap: A Review

This paper reviews our current understanding of auroral features that appear poleward of the main auroral oval within the polar cap, especially those that are known as Sun-aligned arcs, transpolar arcs, or theta auroras. They tend to appear predominantly during periods of quiet geomagnetic activity or northwards directed interplanetary magnetic field (IMF). We also introduce polar rain aurora which has been considered as a phenomenon on open field lines. We describe the morphology of such auroras, their ...

Hosokawa, Keisuke; Kullen, Anita; Milan, Steve; Reidy, Jade; Zou, Ying; Frey, Harald; Maggiolo, Romain; Fear, Robert;

YEAR: 2020     DOI: 10.1007/s11214-020-0637-3

2015

Transpolar arc observation after solar wind entry into the high-latitude magnetosphere

Recently, Cluster observations have revealed the presence of new regions of solar wind plasma entry at the high-latitude magnetospheric lobes tailward of the cusp region, mostly during periods of northward interplanetary magnetic field. In this study, observations from the Global Ultraviolet Imager (GUVI) experiment on board the TIMED spacecraft and Wideband Imaging Camera imager on board the IMAGE satellite are used to investigate a possible link between solar wind entry and the formation of transpolar arcs in the polar ...

Mailyan, B.; Shi, Q.; Kullen, A.; Maggiolo, R.; Zhang, Y.; Fear, R.; Zong, Q.-G.; . Y. Fu, S; Gou, X.; Cao, X.; Yao, Z.; Sun, W.; Wei, Y.; . Y. Pu, Z;

YEAR: 2015     DOI: 10.1002/2014JA020912

magnetosphere-ionosphere coupling; transpolar arcs; in situ measurements

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 ...

Maes, L.; Maggiolo, R.; De Keyser, J.; Dandouras, I.; Fear, R.; Fontaine, D.; Haaland, S.;

YEAR: 2015     DOI: 10.1002/2014GL062972

cold ion outflow; ion upflow; polar cap arc; polar ionosphere; polar wind; solar illumination

2012

Polar cap arcs from the magnetosphere to the ionosphere: kinetic modelling and observations by Cluster and TIMED

Maggiolo, R.; Echim, M.; Wedlund, Simon; Zhang, Y.; Fontaine, D.; Lointier, G.; Trotignon, J.-G.;

YEAR: 2012     DOI: 10.5194/angeo-30-283-2012



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