Abstract
Based on the astronomical ephemerides DE-406, theoretical calculations have been performed of the interannual variability of the Earth’s insolation related to celestial-mechanical processes for 365 points of a tropical year in the time period from 1900 to 2050. It has been determined that the average amplitude of variations of the interannual insolation is 0.310 W/m2 (0.023% of the solar constant). The calculated variations are characterized by strict periodicity that corresponds with the length of a synodic month. Connection between the extreme values of the calculated insolation variability and syzygies has been defined. The average amplitude of the calculated variability exceeds by 1.7 times (0.01% of the solar constant) the amplitude of the interannual variability in the 11-year variation of the total Earth’s insolation.
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Original Russian Text © V.M. Fedorov, 2016, published in Astronomicheskii Vestnik, 2016, Vol. 50, No. 3, pp. 233–238.
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Fedorov, V.M. Theoretical calculation of the interannual variability of the Earth’s insolation with daily resolution. Sol Syst Res 50, 220–224 (2016). https://doi.org/10.1134/S0038094616030011
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DOI: https://doi.org/10.1134/S0038094616030011