Journal : Acta Geophysica
Article : Solar EUV/FUV irradiance variations: analysis and observational strategy

Authors :
Lilensten, J.
Laboratoire de Planétologie de Grenoble, OSUG-CNRS, Grenoble, France, jean.lilensten@obs.ujf-grenoble.fr,
Zuccarello, F.
Dipartimento di Fisica e Astronomia, Universitá di Catania, Catania, Italy, fzu@oact.inaf.it,
Zuccarello, F.
Dipartimento di Fisica e Astronomia, Universitá di Catania, Catania, Italy, fzu@oact.inaf.it,
Lundstedt, H.
Swedish Institute of Space Physics, Lund, Sweden, henrik@lund.irf.se,
Kretzschmar, M.
LPCE/CNRS, Orléans, France, matthieu.kretzschmar@cnrs-orleans.fr,
Abstract : The knowledge of solar extreme and far ultraviolet (EUV) irradiance variations is essential for the characterization of the Earth’s upper atmosphere. For a long time, this knowledge has been based on empirical models, which are themselves based on proxies of the solar activity. However, the accurate modeling and prediction of the Earth’s upper atmosphere necessitate to improve the precision on the irradiance and its variations below about 200 nm. Here, we present a review of recent works made by the authors that aim at quantifying the irradiance variability at these wavelengths, and that lead to new way of monitoring the solar EUV/FUV irradiance spectrum. In more details, it is shown that the quantification of the high level of redundancy in the solar spectrum variability allows to envisage measuring only a small portion of the spectrum without losing essential knowledge. Finally, we discuss what should and could be measured in order to retrieve the solar extreme and far ultraviolet spectrum.

Keywords : solar irradiance, space weather, aeronomy,
Publishing house : Instytut Geofizyki PAN
Publication date : 2009
Number : Vol. 57, no. 1
Page : 42 – 51

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DOI :
Qute : Lilensten, J. ,Zuccarello, F. ,Zuccarello, F. ,Lundstedt, H. ,Kretzschmar, M. ,Kretzschmar, M. , Solar EUV/FUV irradiance variations: analysis and observational strategy. Acta Geophysica Vol. 57, no. 1/2009
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