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Comparison of Aeronet and Skyrad4.2 Inversion Products Retrieved from a Cimel Ce318 Sunphotometer : Volume 4, Issue 6 (18/11/2011)

By Estellés, V.

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Book Id: WPLBN0003984348
Format Type: PDF Article :
File Size: Pages 31
Reproduction Date: 2015

Title: Comparison of Aeronet and Skyrad4.2 Inversion Products Retrieved from a Cimel Ce318 Sunphotometer : Volume 4, Issue 6 (18/11/2011)  
Author: Estellés, V.
Volume: Vol. 4, Issue 6
Language: English
Subject: Science, Atmospheric, Measurement
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Utrillas, M. P., Expósito, F., Estellés, V., Martínez-Lozano, J. A., & Campanelli, M. (2011). Comparison of Aeronet and Skyrad4.2 Inversion Products Retrieved from a Cimel Ce318 Sunphotometer : Volume 4, Issue 6 (18/11/2011). Retrieved from

Description: Dept. Física de la Terra i Termodinámica, Universitat de València, C/Dr. Moliner 50, 46100 Burjassot, Spain. SKYNET is an international research network of ground based sky-sunphotometers for the observation and monitoring of columnar aerosol properties. The algorithm developed by SKYNET is called SKYRAD.pack, and so far it has been used on Prede instruments only. In this study we have modified the SKYRAD.pack software in order to adapt it to Cimel sunphotometers. A one month database of Cimel data obtained at Burjassot (Valencia, Spain) has been processed with this program and the obtained inversion products have been compared with AERONET retrievals. In general, the differences found were consistent with the individual error assessments for both algorithms. Although the aerosol optical depth compared well for any aerosol burden situation (rmsd of 0.002–0.013 for all wavelengths), inversion products such as the single scattering albedo, refractive index and asymmetry parameter compared better for higher turbidity situations. The comparison performed for cases with an aerosol optical depth at 440 nm over 0.2 showed rms differences of 0.025–0.049 for single scattering albedo, 0.005–0.034 for the real part of refractive index, 0.004–0.007 for the imaginary part of the refractive index, and 0.006–0.009 for the asymmetry parameter. In respect to the volume distributions, the comparison also showed a good agreement for high turbidity cases (mainly within the 0.01–7 μm interval) although the already known discrepancy in the extremes of the distribution was still found in 40% of cases, in spite of eliminating data and instrumental differences present in previous studies.

Comparison of AERONET and SKYRAD4.2 inversion products retrieved from a Cimel CE318 sunphotometer

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