NLTE solar irradiance modeling with the COSI code

Modeling Solar Lyman Alpha Irradiance

Solar Lyman alpha irradiance is estimat,ed from various solar indices using linear regression analyses. Models developed with ~nultiple linear regression analysis, including daily values and 81-clay running means of solar indices, predict reasonably well both the shortand long-term variations observed in Lyman alpha. It is shown that the full disk equivalent width of tlle He line at 1083 111x1 ...

Solar irradiance

The UV-A and visible solar irradiance spectrum: inter-comparison of absolutely calibrated, spectrally medium resolution solar irradiance spectra from balloonand satellite-borne measurements W. Gurlit, H. Bösch , H. Bovensmann, J. P. Burrows, A. Butz, C. Camy-Peyret, M. Dorf, K. Gerilowski, A. Lindner, S. Noël, U. Platt, F. Weidner, and K. Pfeilsticker Institut für Umweltphysik und Fernerkundung...

Solar Irradiance Conversion Models*

Studying Solar Irradiance Variability With Wavelet Technique

The detection of variations in solar irradiance by satellitebased experiments during the last 17 years stimulated modelling e orts to help to identify their causes and to provide estimates for irradiance data when no satellite observations exist. Because of the lack of quantitative physical models of solar irradiance, the current empirical models have been developed with linear regression analy...

Confronting a solar irradiance reconstruction with solar and stellar data

Context. A recent paper by Shapiro and colleagues (2011, A&A, 529, A67) reconstructs spectral and total irradiance variations of the Sun during the holocene. Aims. In this note, we comment on why their methodology leads to large (0.5%) variations in the solar TSI on century-long time scales, in stark contrast to other reconstructions which have <∼0.1% variations. Methods. We examine the amplitu...