Airborne Measurements of Areal Spectral Surface Albedo over Different Sea and Land Surfaces
Jonsson, Haflidi H.
MetadataShow full item record
Airborne measurements of the ratio of spectral upward and downward irradiances (so-called spectral albedo) are used to derive the areal spectral surface albedo in the wavelength range from 330 to 1670 nm. The data were collected over different sea and land surfaces in cloudless atmospheric conditions during three field campaigns. Measurements from the Albedometer (developed at IfT) and the NASA Solar Spectral Flux Radiometer (SSFR) are employed. Spectral radiative transfer calculations show that atmospheric scattering and absorption within the layer beneath the flight level considerably contribute to the airborne albedo measurements reported here, even for low flight altitudes (0.2–0.5 km). To remove this atmospheric masking, a nonlinear extrapolation of the airborne albedo measurements to the ground is performed. The nonlinearity is due to the vertically inhomogeneous distribution of the particle microphysical properties. This fact underlines the importance of aerosol profile measurements for the proper correction of atmospheric masking. Examples of the extrapolated areal spectral surface albedos are discussed in terms of their solar zenith angle dependence, their small-scale, and general variability. Finally, typical areal spectral surface albedos for different sea and land surfaces, as derived from the three measurement campaigns, are supplied in parameterized form for use in radiative transfer applications.
Journal of Geophysical Research, Vol. 109 (D08203), 4633The article of record as published may be located at http://dx.doi.org/ 10.1029/2003JD004392.
Showing items related by title, author, creator and subject.
Painter, Thomas H.; Rittger, Karl; McKenzie, Ceretha; Slaughter, Peter; Davis, Robert E.; Dozier, Jeff (Elsevier, 2009);We describe and validate a model that retrieves fractional snow-covered area and the grain size and albedo of that snow from surface reflectance data (product MOD09GA) acquired by NASA's Moderate Resolution Imaging ...
Evaluation of Daytime measurements of Aerosols and Water Vapor made by an Operational Raman Lidar over the Southern Great Plains Ferrare, Richard; Turner, David; Clayton, Marian; Schmid, Beat; Redemann, Jens; Covert, David; Elleman, Robert; Ogren, John; Andrews, Elisabeth; Goldsmith, John E.M.; Jonsson, Haflidi (2006);Raman lidar water vapor and aerosol extinction profiles acquired during the daytime over the Department of Energy (DOE) Atmospheric Radiation Measurement (ARM) Southern Great Plains (SGP) site in northern Oklahoma (36.606 ...
Kruse, Fred A.; Fairbarn, K.G. (SPIE, 2013);Common approaches to multispectral imagery (MSI) and hyperspectral imagery (HSI) data analysis often utilize key image endmember spectra as proxies for ground measurements to classify imagery based on their spectral ...