edu.ucar.opensky::articles:25286 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-24T22:49:56.719022 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d7d50rk9 https://doi.org/10.13012/B2IDB-5893373_V1 https Related Dataset #1 Sun-induced chlorophyll fluorescence of two Nebraska maize sites in 2017 https://doi.org/10.17190/AMF/1246088 https Related Dataset #2 AmeriFlux AmeriFlux US-NR1 Niwot Ridge Forest (LTER NWT1) https://doi.org/10.22002/D1.1231 https Related Dataset #3 Canopy and needle scale fluorescence data from Niwot Ridge, Colorado 2017-2018 https://doi.org/10.5067/MODIS/MCD15A2H.006 https Related Dataset #4 MCD15A2H MODIS/Terra+Aqua Leaf Area Index/FPAR 8-day L4 Global 500m SIN Grid V006 https://doi.org/10.6073/pasta/38afd9e64220c45a799c64d3300fdb94 https Related Dataset #5 Continuous Measurement of Canopy Fluorescence at Harvard Forest since 2013 https://doi.org/10.5065/D6RX99HX https Related Service #1 Cheyenne: SGI ICE XA Cluster Representation of leaf-to-canopy radiative transfer processes improves simulation of far-red Solar-Induced Chlorophyll fluorescence in the community land model version 5 2022-03-01T00:00:00Z publication https://n2t.org/ark:/85065/d7d50rk9 https://doi.org/10.1029/2021MS002747 Li, R. author Lombardozzi, Danica author Shi, M. author Frankenberg, C. author Parazoo, N. C. author Köhler, P. author Yi, K. author Guan, K. author Yang, X. author UCAR/NCAR - Library publisher Recent advances in satellite observations of solar-induced chlorophyll fluorescence (SIF) provide a new opportunity to constrain the simulation of terrestrial gross primary productivity (GPP). Accurate representation of the processes driving SIF emission and its radiative transfer to remote sensing sensors is an essential prerequisite for data assimilation. Recently, SIF simulations have been incorporated into several land surface models, but the scaling of SIF from leaf-level to canopy-level is usually not well-represented. Here, we incorporate the simulation of far-red SIF observed at nadir into the Community Land Model version 5 (CLM5). Leaf-level fluorescence yield was simulated by a parametric simplification of the Soil Canopy-Observation of Photosynthesis and Energy fluxes model (SCOPE). And an efficient and accurate method based on escape probability is developed to scale SIF from leaf-level to top-of-canopy while taking clumping and the radiative transfer processes into account. SIF simulated by CLM5 and SCOPE agreed well at sites except one in needleleaf forest (R-2 > 0.91, root-mean-square error <0.19 W.m(-2).sr(-1).mu m(-1)), and captured the day-to-day variation of tower-measured SIF at temperate forest sites (R-2 > 0.68). At the global scale, simulated SIF generally captured the spatial and seasonal patterns of satellite-observed SIF. Factors including the fluorescence emission model, clumping, bidirectional effect, and leaf optical properties had considerable impacts on SIF simulation, and the discrepancies between simulate d and observed SIF varied with plant functional type. By improving the representation of radiative transfer for SIF simulation, our model allows better comparisons between simulated and observed SIF toward constraining GPP simulations. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication Copyright author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. None eng geoscientificInformation