Commission E1 WG Solar Irradiance


Over the last decade a number of solar irradiance variability models have been created to better understand the mechanisms of solar irradiance variability and to provide extended and uninterrupted irradiance records. While most of the models yield a qualitatively similar picture of solar irradiance variability, there are a number of significant systematic discrepancies between their results. In particular, proxy-based and semi-empirical models indicate different solar irradiance variability in the UV. Also the mechanisms of solar irradiance variability on centennial timescales are poorly understood, indicating a need for the models to incorporate more physics-based constraints. This requires a close collaboration between solar irradiance observers and modelers as well as coordinated assistance from experts in MHD simulations and radiative transfer.

In this context, the main goal of our Working Group is to improve collaboration between different solar irradiance modelers and observers, promote further progress in the field and, since the interest in solar irradiance variability extends well beyond the solar community, recommend which solar irradiance datasets to use for such external researchers.

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Working Group Members (12)


Commission E1 Solar Radiation and Structure

Greg Kopp

University of Colorado
3665 Discovery Drive
Boulder 80303
Colorado (CO)
United States

Last updated:
December 6, 2017

Alexander I. Shapiro

Max-Planck-Institut für Sonnensystemforschung
Justus-von-Liebig-Weg 3
37077 Göttingen

Organization website:

Last updated:
December 6, 2017

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