Atmos. Meas. Tech., 4, 1463-1470, 2011
© Author(s) 2011. This work is distributed
under the Creative Commons Attribution 3.0 License.
Sky cover from MFRSR observations
E. Kassianov, J. C. Barnard, L. K. Berg, C. Flynn, and C. N. Long
Pacific Northwest National Laboratory, Richland, Washington, 99352, USA

Abstract. The diffuse all-sky surface irradiances measured at two nearby wavelengths in the visible spectral range and their modeled clear-sky counterparts are the main components of a new method for estimating the fractional sky cover of different cloud types, including cumuli. The performance of this method is illustrated using 1-min resolution data from a ground-based Multi-Filter Rotating Shadowband Radiometer (MFRSR). The MFRSR data are collected at the US Department of Energy Atmospheric Radiation Measurement (ARM) Climate Research Facility (ACRF) Southern Great Plains (SGP) site during the summer of 2007 and represent 13 days with cumuli. Good agreement is obtained between estimated values of the fractional sky cover and those provided by a well-established independent method based on broadband observations.

Citation: Kassianov, E., Barnard, J. C., Berg, L. K., Flynn, C., and Long, C. N.: Sky cover from MFRSR observations, Atmos. Meas. Tech., 4, 1463-1470, doi:10.5194/amt-4-1463-2011, 2011.
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