Aerosol ultraviolet absorption experiment (2002 to 2004), part 1: ultraviolet multifilter rotating shadowband radiometer calibration and intercomparison with CIMEL sunphotometers ... : UV aerosol absorption experiment (2002-04): 1. UV-MFRSR calibration and performance at GSFC ...

• Main Authors: Krotkov, Nickolay, Bhartia, Pawan K., Herman, Jay, Slusser, James R., Labow, Gordon J., Scott, Gwendolyn R., Janson, George T., Eck, Tom, Holben, Brent N.
• Format: Article in Journal/Newspaper
• Language: English
• Published: SPIE 2005
• Subjects: Aerosol Robotic Network
• Online Access: https://dx.doi.org/10.13016/m2ruux-oumh; https://mdsoar.org/handle/11603/28592

Radiative transfer calculations of UV irradiance from total ozone mapping spectrometer (TOMS) satellite data are frequently overestimated compared to ground-based measurements because of the presence of undetected absorbing aerosols in the planetary boundary layer. To reduce these uncertainties, an aerosol UV absorption closure experiment has been conducted at the National Aeronautics and Space Administration/Goddard Space Flight Center (NASA/GSFC) site in Greenbelt, Maryland, using 17 months of data from a shadowband radiometer [UV-multifilter rotating shadowband radiometer (UV-MFRSR), U.S. Department of Agriculture (USDA) UV-B Monitoring and Research Network] colocated with a group of three sun-sky CIMEL radiometers [rotating reference instruments of the NASA Aerosol Robotic Network (AERONET)]. We describe an improved UV-MFRSR on-site calibration method augmented by AERONET-CIMEL measurements of aerosol extinction optical thickness (τₐ) interpolated or extrapolated to the UV-MFRSR wavelengths and ...