Atmospheric Measurement Techniques
Atmospheric Measurement Techniques
AMT
Articles | Volume 19, issue 19
Articles | Volume 19, issue 19
https://doi.org/10.5194/amt-19-6447-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Special issue:
https://doi.org/10.5194/amt-19-6447-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 19, issue 19
Research article
 | 
14 Oct 2026
Research article |  | 14 Oct 2026

Spectral signatures of zenith sky radiance from surface-based sky radiometers: implications for clear- and cloudy-sky detection

Pradeep Khatri, Hitoshi Irie, Hiroshi Kobayashi, Isamu Morino, Yoshitaka Jin, Tadahiro Hayasaka, Hironobu Iwabuchi, Tamio Takamura, and Yoshiki Takayama

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Short summary
This study investigates the spectral characteristics of zenith sky radiances under clear- and cloudy-sky conditions using SKYNET sky radiometer observations. It proposes a simple, physically interpretable method for distinguishing sky states and demonstrates that wavelength-dependent radiance information can support reliable sky-state detection across diverse atmospheric environments.
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SKYNET – the international network for aerosol, clouds,...