Timofeyev , Y.M., G. M. Nerobelov, D. A. Kozlov, I. C. Cherkashin, P. M. Nerobelov, A. N. Rublev , A. B. Uspenskii , and Yu. V. Kiseleva: Spatiotemporal Variation of Outgoing Thermal Radiation of the Earth by the Space-Based IKFS-2 IR Spectrometer, Izvestiya, Atmospheric and Oceanic Physics, 2024, Vol. 60, No. 3, pp. 260–271m DOI: 10.1134/S0001433824700294.
Published: 01.09.2024
Abstract:
Current climate changes on Earth are caused by the violation of the planet’s radiation balance (RB). In this study, the changes in one component of the RB—yearly and monthly averaged global and regional out[1]going thermal radiation of Earth, or the Earth’s own radiation (EOR), in a spectral range of 660–1300 cm–1 for 2015–2022 by an IKFS-2 IR Fourier spectrometer onboard the Meteor-M No. 2 satellite—are analyzed. It is shown that EOR on a global scale, falling in the range of 660–1300 cm–1, on average, decreased during the period of 2015–2022. The mean integral radiation in the same wavelength range decreased by ~0.5 W m–2 in 2015–2022. The most pronounced decrease in EOR was found in the tropics, and the least pronounced was on polar latitudes. A negative trend of the integral EOR was found in the tropics (up to 0.95–1.3 ± 0.1 W m–2 for 8 years), with a relatively high coefficient of determination (0.46–0.57). At the same time, there is no pro[1]nounced trend of EOR on the polar and middle latitudes.