Relationship among the surface albedo, spectral reflectance of canopy, and evaporative fraction at grassland and paddy field Original Research Article

For the purpose of estimating land surface fluxes over a large area, use of remote sensing techniques is and will be essential. Particularly, “in situ” collection of ground truth data has been a very important task for the development of satellite oriented “algorithms”. In this study, we observed “a patch scale” visible and near infrared spectral reflectance, which is obtainable from satellites, and land surface fluxes during and post-growing season at grassland and paddy field: Seasonal trends at grassland and at paddy field were quite different, because of the differences in water as well as growing environment. A good direct correlation was found between vegetation index (NDVI) and surface resistance during the growing season at grassland. A similar result was confirmed between NDVI and surface resistance at paddy field.