Work

Spatio-temporal variation of outgoing thermal radiation of the earth by space-based IR spectrometer IKFS‑2

Year: 2024

Type: article

Abstract: Current Earth climate changes are caused by the violation of the planet’s radiation balance (RB). In this study the changes of the one of RB’s components – yearly and monthly averaged global and regional outgoing thermal radiation of Earth or the Earth own radiation (EOR) in a spectral range 660–1300 cm-1 for 2015–2022 by IR Fourier-spectrometer IKFS-2 onboard the “Meteor-M” No2 satellite – is analyzed. It is shown that EOR on a global scale in a range 660–1300 cm-1 on average decreased during the period of 2015–2022. Mean integral radiation in the same wave-lenght range decreased by ~0.5 W m-2 during 2015–2022. The most pronounced decrease of EOR was found in tropics, when the least pronounced – on polar latitudes. Besides, a negative trend of the integral EOR was found in tropics (up to 0.95–1.3 ± 0.1 W m-2 for the 8 years) with relatively high coefficient of determination (0.46–0.57). At the same time, there is no pronounced trend of EOR on the polar and middle latitudes.

Source: Известия Российской академии наук Физика атмосферы и океана

DOI: 10.31857/s0002351524030045