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EP: Fachverband Extraterrestrische Physik

EP 13: Erdnaher Weltraum

EP 13.3: Vortrag

Donnerstag, 16. März 2017, 17:15–17:30, GW2 B2880

Reconstruction of Solar Irradiance from Cosmogenic Isotope Data — •Chi-Ju Wu¹, Natalie A. Krivova¹, Ilya G. Usoskin², and Sami K. Solanki³ — ¹Max Planck for Solar System Research, Goettingen, Germany — ²Physics Department, Oulu University, Finland — ³Kyung-Hee University, South Korea

Assessment of the solar irradiance changes, especially on long timescales, is crucial since the Sun is the main energy source to Earth*s climate system. Solar irradiance on timescales of 11-year or shorter is measured by space-based experiments while past variations have to be reconstructed from the available proxies with the help of suitable models. The sunspot number is commonly used as proxy of solar activity back to the Maunder Minimum, while only cosmogenic isotope data, such as 14C and 10Be, are available for the earlier times. In this talk we will present the latest solar irradiance reconstructions derived from the most up-to-date cosmogenic isotope data and the geomagnetic field model.