Physics
Scientific paper
Sep 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003esasp.535..275k&link_type=abstract
In: Solar variability as an input to the Earth's environment. International Solar Cycle Studies (ISCS) Symposium, 23 - 28 June 2
Physics
2
Irradiance: Solar
Scientific paper
There is growing evidence that solar variability influences the Earth's climate, although the underlying mechanism is not yet understood. Variations in the solar total and spectral irradiance often play a central role within various processes that have been suggested. Whereas changes in the total irradiance can affect the overall energy balance of the Earth's atmosphere, variations in its spectral distribution, in particular in the UV, have a pronounced effect on the chemistry of the Earth's upper atmosphere. Measurements of the solar total irradiance are only available since 1978 and the spectral irradiance record is even shorter. This calls for a reconstruction of irradiance variations at earlier times with the help of models. We first outline our current understanding of the main mechanism responsible for irradiance variations and describe the efforts to reconstruct them. The reconstructed total and UV irradiance is then employed to estimate the solar contribution to global warming, with particular emphasis to the period since 1970.
Krivova Natalie A.
Solanki Sami K.
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