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TitleMapping of surface albedo over Mackenzie River basin area from satellite observations
AuthorTrishchenko, A PORCID logo; Klopenkov, K V; Ungureanu, C; Latifovic, R; Luo, Y; Park, W B
SourceCold region atmospheric and hydrologic studies. The Mackenzie GEWEX Experience: Atmospheric dynamics; by Woo, M K (ed.); vol. 1, 2008.
Alt SeriesEarth Sciences Sector, Contribution Series 2005743
ProvinceNorthwest Territories
AreaMackenzie River
SubjectsNature and Environment
ProgramReducing Canada's Vulnerability to Climate Change
AbstractThis paper describes the approach and results of mapping surface albedo and bi-directional reflectance distribution function (BRDF) properties over the Mackenzie River basin (MRB). Satellite observations from three types of satellite sensors are used: (1) the Advanced Very High Resolution Radiometer (AVHRR) sensor onboard the NOAA platforms, (2) the VEGETATIO (VGT) sensor onboard the SPOT platforms, and (3) the Moderate Resolution Imaging Spectroradiometer (MODIS) sensor onboard the TERRA platform. The data collected using these sensors span the period of 1985 to 2004. Seasonal and interannual variability of spectral and broadband albedo over the MAGS region is analysed. Broadband albedo averaged over the region changes from 0.11±0.03 in summer to 0.4-0.55 in winter. Substantial long-term systematic trends in surface albedo are not observed over the study period. The quantitative magnitude of possible trends in surface albedo over the region is difficult to deduce due to large interannual variability, uncertainties in sensors properties, atmospheric correction and retrieval procedure.

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