Hourly to decadal time scale variations of the spectral and total “solar constant” |
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| Authors: | K Ya Kondratyev G A Nikolsky E O Shultz |
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| Institution: | (1) Present address: Scientific Research Center of Ecological Safety, Russian Academy of Sciences, Korpusnaya ul., 18, 197042 St. Petersburg, Russia;(2) Present address: Department of Atmospheric Physics, St. Petersburg University, Petrodvorets, Ulyanovskaya ul., 1, 198904 St. Petersburg, Russia |
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| Abstract: | Summary The most significant solar spectral radiation bursts that occurred during more than twelve-years observation period at an high altitude station are analyzed. It is shown that the number and amplitudes of solar spectral bursts increase when the solar activity (SA) maximum is approaching. A plausible mechanism of short-term variations of extra-atmospheric solar spectral irradiance (ETSSI) is discussed. It appears that a burst of ETSSI arises when the Earth is sporadically irradiated by a strong flux of induced violet-blue high coming out of magnetic flux tubes in the active region (AR) of the Sun. We confirm earlier conclusions that on the time-scale of decades there is a close relationship between variations in the areas of faculae, the solar constant, and surface air temperature. On the basis of these results we suggest that at the end of the 1930s, when the Sun was very active, its effective output was about 0.4%, and the surface temperature in the Northern hemisphere about 0.4°C, higher than in the first decade of the 20th century.With 5 Figures |
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