Calculating the optimal time when albedo approximates its daily average: an example using soil surfaces with various roughnesses at different latitudes
Abstract:This paper describes how the blue-sky albedo of soil varies during the whole year from midday to sunset under clear-sky conditions. A hemispherical-directional reflectance model was used to calculate albedo variations associated with smooth, moderate and rough soil surfaces, located between the latitude angles of 75° in the Northern and Southern Hemispheres. We calculate the time when the albedo, acquired by an instantaneous observation, best represents its daily averaged value. This optimal time range is assessed in the context of remote-sensing satellite technology.
Document Type: Research Article
Affiliations: 1: Department of Soil Science and Remote Sensing of Soils, Institute of Physical Geography and Environmental Planning, Adam Mickiewicz University, Poznan, Poland 2: Mathematics and Computer Science Faculty, Adam Mickiewicz University, Poznan, Poland
Publication date: 2010-03-01