Browsing NTNU Open by Author "Tyssøy, Hilde Nesse"
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Electron precipitation characteristics during isolated, compound, and multi-night substorm events
Partamies, Noora; Tesema, Fasil; Bland, Emma; Heino, Erkka; Tyssøy, Hilde Nesse; Kallelid, Erlend Salte (Peer reviewed; Journal article, 2021)A set of 24 isolated, 46 compound, and 36 multi-night substorm events from the years 2008–2013 have been analysed in this study. Isolated substorm events are defined as single expansion–recovery phase pairs, compound ... -
HEPPA III Intercomparison Experiment on Electron Precipitation Impacts: 1. Estimated Ionization Rates During a Geomagnetic Active Period in April 2010
Tyssøy, Hilde Nesse; Sinnhuber, M.; Asikainen, T.; Bender, Stefan; Clilverd, M.A.; Funke, B.; van de Kamp, M.; Pettit, J.M.; Randall, C.E.; Reddmann, T.; Rodger, C.J.; Rozanov, E.; Smith-Johnsen, Christine; Sukhodolov, T.; Verronen, P.T.; Wissing, J.M.; Yakovchuk, O. (Peer reviewed; Journal article, 2022)Precipitating auroral and radiation belt electrons are considered an important part of the natural forcing of the climate system. Recent studies suggest that this forcing is underestimated in current chemistry-climate ... -
Heppa III Intercomparison Experiment on Electron Precipitation Impacts: 2. Model-Measurement Intercomparison of Nitric Oxide (NO) During a Geomagnetic Storm in April 2010
Sinnhuber, M.; Tyssøy, Hilde Nesse; Asikainen, T.; Bender, Stefan; Funke, B.; Hendrickx, K.; Pettit, J.M.; Reddmann, T.; Rozanov, E.; Schmidt, H.; Smith-Johnsen, Christine; Sukhodolov, T.; Szeląg, M.E.; van de Kamp, de; Verronen, P.T.; Wissing, J.M.; Yakovchuk, O.S. (Peer reviewed; Journal article, 2022)Precipitating auroral and radiation belt electrons are considered to play an important part in the natural forcing of the middle atmosphere with a possible impact on the climate system. Recent studies suggest that this ... -
The impact of energetic electron precipitation on mesospheric hydroxyl during a year of solar minimum
Sandanger, M.I.; Tyssøy, Hilde Nesse; Hibbins, Robert Edward; Zawedde, A.E.; Stadsnes, Johan; Espy, Patrick Joseph; Ødegaard, L-K (Journal article; Peer reviewed, 2016)In 2008 a sequence of geomagnetic storms occurred triggered by high-speed solar wind streams from coronal holes. Improved estimates of precipitating fluxes of energetic electrons are derived from measurements on board the ...