Evolution of Meteosat Solar and Infrared Spectra (2004–2022) and Related Atmospheric and Earth Surface Physical Properties

The evolution of atmospheric and Earth surface physical properties over a period of 15 years (based on data from the longer period from 2004 to 2022) is analyzed through the radiance fluxes measured by the Meteosat second generation (MSG) satellite series. The results show significant changes in the...

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Bibliographic Details
Published in:Atmosphere 2023-09, Vol.14 (9), p.1354
Main Authors: Fernández, José I. Prieto, Georgiev, Christo G.
Format: Article
Language:English
Subjects:
Absorption
Absorption bands
absorption of thermal radiation
Absorption spectra
Atmosphere
Atmospheric evolution
Carbon dioxide
Carbon dioxide concentration
Climate change
Cloud cover
Earth
Earth surface
Evolution
Fluxes
Forecasts and trends
Humidity
Infrared spectra
Infrared spectroscopy
Intergovernmental Panel on Climate Change
long-term series
Meteorological satellites
METEOSAT
Observations
Physical properties
Properties
Radiance
Radiation
radiation flux
satellite observations
Satellites
Spectra
Surface chemistry
Surface temperature
Temperature
Trends
Troposphere
Upper troposphere
Water vapor
Water vapor absorption
Water vapour
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Summary:The evolution of atmospheric and Earth surface physical properties over a period of 15 years (based on data from the longer period from 2004 to 2022) is analyzed through the radiance fluxes measured by the Meteosat second generation (MSG) satellite series. The results show significant changes in the solar (−2.6% to −1.2%) and infrared (+0.4% to +1.0%) domains, with −3.9% for the CO2 absorption band (near 13.4 µm), all variations consistent with results from similar studies of radiation fluxes. Whereas the variation at 13.4 μm radiation is explained by the increase in the CO2 concentration in the atmosphere, the flux increase towards the satellite in the remainder of the infrared spectra measured by MSG corresponds to surface warming (as documented in external sources like the IPCC, the Intergovernmental Panel on Climate Change). The solar outgoing flux decrease exposes a recent reduction in the Earth’s cloud cover under the nominal field of view of Meteosat at 0 degrees longitude (MFOV). Radiance evolution at 6.2 µm and 7.3 µm, a spectral region of intense absorption by water vapor, is interpreted in terms of sensitivity to the humidity content in the middle and upper troposphere by means of a simple radiation transfer model.
ISSN:2073-4433
2073-4433
DOI:10.3390/atmos14091354