Journal
REMOTE SENSING
Volume 8, Issue 3, Pages -Publisher
MDPI
DOI: 10.3390/rs8030222
Keywords
satellite; remote sensing; net radiation; GLASS products
Categories
Funding
- National High-Technology Research and Development Program of China [2013AA122800]
- Natural Science Foundation of China [41401381, 41101310, 41331173]
- Special Foundation for Young Scientists of State Laboratory of Remote Sensing Science [15RC-12]
- U.S. Department of Energy, Biological and Environmental Research, Terrestrial Carbon Program [DE-FG02-04ER63917]
- CarboEuropeIP
- FAO-GTOS-TCO
- Ileaps
- Max Planck Institute for Biogeochemistry
- National Science Foundation
- University of Tuscia
- Universite Laval
- Environment Canada
- U.S. Department of Energy
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Mapping surface all-wave net radiation (R-n) is critically needed for various applications. Several existing R-n products from numerical models and satellite observations have coarse spatial resolutions and their accuracies may not meet the requirements of land applications. In this study, we develop the Global LAnd Surface Satellite (GLASS) daytime R-n product at a 5 km spatial resolution. Its algorithm for converting shortwave radiation to all-wave net radiation using the Multivariate Adaptive Regression Splines (MARS) model is determined after comparison with three other algorithms. The validation of the GLASS R-n product based on high-quality in situ measurements in the United States shows a coefficient of determination value of 0.879, an average root mean square error value of 31.61 Wm(-2), and an average bias of -17.59 Wm(-2). We also compare our product/algorithm with another satellite product (CERES-SYN) and two reanalysis products (MERRA and JRA55), and find that the accuracy of the much higher spatial resolution GLASS R-n product is satisfactory. The GLASS R-n product from 2000 to the present is operational and freely available to the public.
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