Title: Reconstruction of solar UV irradiance since 1974
Authors : Krivova, N. A.
Solanki, S. K.
Wenzler, T.
Podlipnik, B.
Published in : Journal of geophysical research : atmospheres
Volume(Issue) : 114
Issue : D1/D00I04
Publisher / Ed. Institution : Wiley
Issue Date: 2009
License (according to publishing contract) : Licence according to publishing contract
Type of review: Peer review (Publication)
Language : English
Subject (DDC) : 500: Natural sciences and mathematics
Abstract: Variations of the solar UV irradiance are an important driver of chemical and physical processes in the Earth's upper atmosphere and may also influence global climate. Here we reconstruct solar UV irradiance in the range 115–400 nm over the period 1974–2007 by making use of the recently developed empirical extension of the Spectral And Total Irradiance Reconstruction (SATIRE) models employing Solar Ultraviolet Spectral Irradiance Monitor (SUSIM) data. The evolution of the solar photospheric magnetic flux, which is a central input to the model, is described by the magnetograms and continuum images recorded at the Kitt Peak National Solar Observatory between 1974 and 2003 and by the Michelson Doppler Imager instrument on SOHO since 1996. The reconstruction extends the available observational record by 1.5 solar cycles. The reconstructed Ly-α irradiance agrees well with the composite time series by Woods et al. (2000). The amplitude of the irradiance variations grows with decreasing wavelength and in the wavelength regions of special interest for studies of the Earth's climate (Ly-α and oxygen absorption continuum and bands between 130 and 350 nm) is 1–2 orders of magnitude stronger than in the visible or if integrated over all wavelengths (total solar irradiance). 
Departement: School of Engineering
Publication type: Article in scientific Journal
DOI : 10.1029/2009JD012375
ISSN: 2169-897X
URI: https://digitalcollection.zhaw.ch/handle/11475/10652
Appears in Collections:Publikationen School of Engineering

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