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TitleSpatiotemporal variations in land surface albedo across Canada from MODIS observations
 
AuthorDavidson, A; Wang, SORCID logo
SourceEarth observation of Canada's landmass: results and future needs: a workshop in honour of Josef Cihlar on the occasion of his retirement; Canadian Journal of Remote Sensing vol. 31, no. 5, 2005 p. 377-390, https://doi.org/10.5589/m05-021 Open Access logo Open Access
Year2005
Alt SeriesEarth Sciences Sector, Contribution Series 2005559
PublisherInforma UK Limited
MeetingEarth observation of Canada's landmass: results and future needs: a workshop in honour of Josef Cihlar on the occasion of his retirement; Ottawa, ON; CA; September 30 - October 1, 2004
Documentserial
Lang.English
Mediapaper; on-line; digital
File formatpdf
ProvinceCanada; British Columbia; Alberta; Saskatchewan; Manitoba; Ontario; Quebec; New Brunswick; Nova Scotia; Prince Edward Island; Newfoundland and Labrador; Northwest Territories; Yukon; Nunavut
NTS1; 2; 3; 10; 11; 12; 13; 14; 15; 16; 20; 21; 22; 23; 24; 25; 26; 27; 28; 29; 30; 31; 32; 33; 34; 35; 36; 37; 38; 39; 40; 41; 42; 43; 44; 45; 46; 47; 48; 49; 52; 53; 54; 55; 56; 57; 58; 59; 62; 63; 64; 65; 66; 67; 68; 69; 72; 73; 74; 75; 76; 77; 78; 79; 82; 83; 84; 85; 86; 87; 88; 89; 92; 93; 94; 95; 96; 97; 98; 99; 102; 103; 104; 105; 106; 107; 114O; 114P; 115; 116; 117; 120; 340; 560
Lat/Long WENS-141.0000 -50.0000 90.0000 41.7500
SubjectsNature and Environment; remote sensing; climate; modelling; satellite imagery; landscape types; vegetation; snow; variation trends; analyses
Illustrationssatellite images; tables; graphs
ProgramClimate Change Action Fund (CCAF)
ProgramReducing Canada's Vulnerability to Climate Change
Released2014 06 02
AbstractA detailed knowledge of spatiotemporal variations in surface albedo is crucial if surface-atmosphere energy exchanges are to be accurately represented in climate models. Satellite observations can provide this information. This study uses moderate resolution imaging spectroradiometer (MODIS) data to investigate how summer and winter albedos, and the intra-annual variation in albedo, vary across the Canadian landscape. We show that (i) albedos generally decrease as one moves from grassland to broadleaved forest to needleleaved and mixed forest; (ii) the effects of snow on albedo vary among cover types; (iii) the largest intra-annual albedo variations occur over grasslands, cropland, and tundra; (iv) significant differences in albedo occur not only among broadleaved forest, needleleaf forest, grassland, and tundra, but also among their various canopy types (e.g., open versus closed canopies); and (v) land cover types sharing similar albedos in winter do not necessarily share similar albedos in summer. These trends are caused by differences in canopy structure and are supported to varying degrees by other in situ and remote sensing studies. These results suggest that the use of overly general land cover classes (e.g., needleleaved forest, grassland, tundra) in climate models will ignore important local-scale spatial variations in surface albedo.
GEOSCAN ID221553

 
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