Articles | Volume 17, issue 20
https://doi.org/10.5194/amt-17-6085-2024
https://doi.org/10.5194/amt-17-6085-2024
Research article
 | 
18 Oct 2024
Research article |  | 18 Oct 2024

Intercomparison of aerosol optical depth retrievals from GAW-PFR and SKYNET sun photometer networks and the effect of calibration

Angelos Karanikolas, Natalia Kouremeti, Monica Campanelli, Victor Estellés, Masahiro Momoi, Gaurav Kumar, Stephan Nyeki, and Stelios Kazadzis

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Cited articles

Cachorro, V. E., Berjon, A., Toledano, C., Mogo, S. N., Prats, A. M., De Frutos, J. Vilaplana, M., Vilaplana, J. M., Sorribas, M., De La Morena, B. A., Gröbner, J., and Laulainenet, N.: Detailed aerosol optical depth intercomparison between Brewer and Li-Cor 1800 spectroradiometers and a Cimel sun photometer, J. Atmos. Ocean. Tech., 26, 1558–1571, 2009. 
Campanelli, M., Nakajima, T., and Olivieri, B.: Determination of the solar calibration constant for a sun-sky radiometer: proposal of an in-situ procedure, Appl. Optics, 43, 651–659, https://doi.org/10.1364/AO.43.000651, 2004. 
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Short summary
Different sun photometer networks use different instruments, post-processing algorithms and calibration protocols for aerosol optical depth (AOD) retrieval. Such differences can affect the homogeneity and comparability of their measurements. In this study, we assess the homogeneity between the sun photometer networks GAW-PFR and SKYNET, analysing common measurements during three campaigns between 2017–2021, and investigate the main cause of the differences.
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