TY - JOUR

T1 - Spatiotemporal Variation of Outgoing Thermal Radiation of the Earth by the Space-Based IKFS-2 IR Spectrometer

AU - Timofeyev, Yu.M.

AU - Nerobelov, G.M.

AU - Kozlov, D.A.

AU - Cherkashind, I.C.

AU - Nerobelov, P.M.

AU - Rublev, A.N.

AU - Uspenskii, A.B.

AU - Kiseleva, Yu.V.

PY - 2024/6/1

Y1 - 2024/6/1

N2 - 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 outgoing 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 pronounced trend of EOR on the polar and middle latitudes.

AB - 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 outgoing 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 pronounced trend of EOR on the polar and middle latitudes.

KW - IKFS-2

KW - climate change on Earth

KW - radiation balance

KW - thermal radiation on Earth

UR - https://www.mendeley.com/catalogue/ae044dde-7424-3147-8ff6-f8e5c48d1c92/

U2 - 10.1134/S0001433824700294

DO - 10.1134/S0001433824700294

M3 - Article

VL - 60

SP - 260

EP - 271

JO - Izvestiya, Atmospheric and Oceanic Physics

JF - Izvestiya, Atmospheric and Oceanic Physics

SN - 0001-4338

IS - 3

ER -