نتایج جستجو برای: intercepted photosynthetically active radiation
تعداد نتایج: 669269 فیلتر نتایج به سال:
Vegetation productivity metrics such as gross primary production (GPP) at the canopy scale are greatly affected by the efficiency of using absorbed radiation for photosynthesis, or light use efficiency (LUE). Thus, close investigation of the relationships between canopy GPP and photosynthetically active radiation absorbed by vegetation is the basis for quantification of LUE. We used multiyear o...
The aims of this work are to present an analysis quality solar radiation data and develop several hourly models photosynthetically active (PAR) using combinations radiometric variables such as global horizontal irradiance (GHI), diffuse (DHI), direct normal (DNI) from their dimensionless indices atmospheric clearness index (kt), fraction (kd), (kb) together with elevation angle (?). GHI, DHI, D...
Miscanthus is a rhizomatous C4 grass of great interest as a biofuel crop because it has the potential to produce high yields over a wide geographical area with low agricultural inputs on marginal land less suitable for food production. At the moment, a clonal interspecific hybrid Miscanthus × giganteus is the most widely cultivated and studied in Europe and the United States, but breeding progr...
The diffuse attenuation coefficient of photosynthetically active radiation is an important inherent optical property the subaquatic light field. This parameter, as a measure transparency medium, good indicator water quality. Degradation properties due to anthropogenic disturbances common phenomenon in freshwater ecosystems. In this study, we used four algorithm-based Landsat 8 OLI and Sentinel-...
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