Surface albedo spatial variability in North America: Gridded data vs. local measurements
- Solar Consulting Services, Colebrook, NH (United States)
- Solargis s.r.o., Bratislava (Slovakia)
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
Considering the current booming interest for the large-scale deployment of bifacial photovoltaic modules, the solar industry now requires accurate estimates of broadband surface albedo at high spatial resolution. In this context, the present study evaluates the adequacy and performance over North America of two Moderate Resolution Imaging Spectroradiometer (MODIS) white-sky albedo products (at 500-m and 1-km resolution) and the National Solar Radiation Database (NSRDB) product at 4-km resolution. Two variations of the 500-m MODIS product are also considered: black-sky albedo and all-sky albedo. Albedo observations from 36 radiometric stations during 2011–2015 are analyzed while considering the apparent homogeneity of the surface characteristics over the 4x4 km NSRDB pixel in which they are located. Even at sites where the albedo around the station has been found “homogeneous” in the literature, marked differences are found between the daily observations and the gridded estimates at any spatial resolution. Furthermore, differences in seasonal behavior and between the three different albedo types also impact the accuracy of the albedo estimates, with overtones caused by local specificities and inhomogeneities. All this precludes the desirable evaluation of the local albedo at a specific site of relatively small size compared to its corresponding 4x4-km pixel if only the mean albedo over that pixel is known. Significant discrepancies are also found at snow-impacted sites, most importantly in the case of the NSRDB albedo estimates, which are typically much too high.
- Research Organization:
- National Renewable Energy Laboratory (NREL), Golden, CO (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Solar Energy Technologies Office
- Grant/Contract Number:
- AC36-08GO28308; EE0007673
- OSTI ID:
- 1821613
- Report Number(s):
- NREL/JA-5D00-77988; MainId:31897; UUID:dbf7ad36-40cf-47f5-acf3-a1c901a01b28; MainAdminID:24529
- Journal Information:
- Solar Energy, Journal Name: Solar Energy Vol. 227; ISSN 0038-092X
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Development of a MODIS-Derived Surface Albedo Data Set: An Improved Model Input for Processing the NSRDB
Measured and satellite-derived albedo data for estimating bifacial photovoltaic system performance
Downscaled GOES-R 500m Land Surface Albedo Over SAIL
Technical Report
·
Wed Nov 30 23:00:00 EST 2016
·
OSTI ID:1335471
Measured and satellite-derived albedo data for estimating bifacial photovoltaic system performance
Journal Article
·
Sat Jan 16 19:00:00 EST 2021
· Solar Energy
·
OSTI ID:1763970
Downscaled GOES-R 500m Land Surface Albedo Over SAIL
Dataset
·
Tue Nov 05 23:00:00 EST 2024
·
OSTI ID:2476231