Analysis of long-wave radiation measurements in a background region of Western Siberia
T.K. Sklyadneva1, B.D. Belan1, G.A. Ivlev1, O.V. Kustov1,2
1V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, Tomsk, Russia
2Tomsk State University of Control Systems and Radioelectronics, Tomsk, Russia
Keywords: radiation balance, incoming long-wave radiation, outgoing long-wave radiation
Abstract
Radiation balance of the underlying surface ( B ) is one of climate-forming factors, which influences the current climate change. The work discussed the measurements of the components of B (the counter-radiation of the atmosphere E a and the radiation of the Earth's surface E z) in a background region of Western Siberia in 2021-2024. The ranges of variability (hourly, daily, and monthly), extreme hourly and daily totals, and hourly average values of E a and E z are estimated; their daily cycles are analyzed. The maximal average amplitudes of E z daily cycle are observed in summer (50-70 W/m2); in winter they are significantly smaller (7-11 W/m2). The daily cycle of E a is weaker pronounced, its amplitude is 2.5-3.5 times lower than that of E z throughout the year. Overcast sky conditions increase the atmospheric counter-radiation by 40-80 W/m2 compared to clear sky conditions. The measurements are shown to meet the criteria for monitoring long-wave components of the radiation balance specified for the Roshydromet network stations. The results are of interest for the climate change analysis and verification of radiation patterns.
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