Vol. 39, issue 07, article # 9

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.

Keywords:

radiation balance, incoming long-wave radiation, outgoing long-wave radiation

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