User talk:FAPARCHL/sandbox

The fractional Absorption of Photosynthetically Active Radiation by canopy chlorophyll (fAPARchl, sometimes also noted fPARchl)[1] is the fraction of the incoming Photosynthetically Active Radiation (PAR) absorbed by canopy chlorophyll that is associated with the plant photosynthesis process. The fractional Absorption of Photosynthetically Active Radiation by canopy non-chlorophyll components (fAPARnon-chl, sometimes also noted fPARnon-chl) is the fraction of the incoming Photosynthetically Active Radiation (PAR) absorbed by canopy non-chlorophyll components that is not used for plant photosynthesis. The fAPARchl is directly related to vegetation gross primary productivity (GPP) or photosynthesis[2]. It can be utilized in models to estimate vegetation assimilation rate of carbon dioxide.

The coupled Leaf-Vegetation-Soil-Snow-Surface water radiative transfer model (LVS3) used to retrieve fAPARchl and fAPARnon-chl has been published [3].

[1] ZHANG, Q; XIAO, X; BRASWELL, B; LINDER, E; BARET, F; MOOREIII, B (2005-11-30). "Estimating light absorption by chlorophyll, leaf and canopy in a deciduous broadleaf forest using MODIS data and a radiative transfer model". Remote Sensing of Environment. 99 (3): 357–371. doi:10.1016/j.rse.2005.09.009. ISSN 0034-4257.

[2] Zhang, Qingyuan; Cheng, Yen-Ben; Lyapustin, Alexei I.; Wang, Yujie; Gao, Feng; Suyker, Andrew; Verma, Shashi; Middleton, Elizabeth M. (2014-10). "Estimation of crop gross primary production (GPP): fAPARchl versus MOD15A2 FPAR". Remote Sensing of Environment. 153: 1–6. doi:10.1016/j.rse.2014.07.012.

[3] Zhang, Qingyuan; Yao, Tian; Huemmrich, K. Fred; Middleton, Elizabeth M.; Lyapustin, Alexei; Wang, Yujie (2020-04). "Evaluating impacts of snow, surface water, soil and vegetation on empirical vegetation and snow indices for the Utqiaġvik tundra ecosystem in Alaska with the LVS3 model". Remote Sensing of Environment. 240: 111677. doi:10.1016/j.rse.2020.111677.