European Facility For Airborne Research

European Facility For Airborne Research Dec. 4, 2022, 13:24


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

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 it is 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. With 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 the cases, in spite of eliminating data and instrumental differences present in previous studies.

Available from
M. P. Utrillas, F. Expósito,
Journal Atmospheric Measurement Techniques
Volume 5
Pages 569-579
Year 2012
Times cited 0
Institute country Spain
Type of science
  • Aerosol chemistry and physics
Field of science
  • Instrument development (includes certification)
  • Troposphere
File details
Added July 18, 2014, 00:00
Last update April 28, 2016, 09:40
Size 685.9 KB
File name Estelles12a_20140718122832.pdf
Visibility Public - Available for any user
Links with specific subjects

Go to the document list

Back to top
Copyright © 2022 EUFAR All rights reserved.