edu.ucar.opensky::articles:27091 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-24T18:53:16.917982 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.org/ark:/85065/d75143d5 https://doi.org/10.15486/ngt/1411973 https Related Dataset #1 Leaf mass area, Feb2016-May2016, PA-SLZ, PA-PNM, PA-BCI: Panama https://doi.org/10.15486/ngt/1423307 https Related Dataset #2 QA/QC-ed BCI meteorological drivers https://doi.org/10.15486/ngt/1570244 https Related Dataset #3 Panama Land Model (CLM/ELM) Site Drivers https://doi.org/10.25573/data.10042406.v20 https Related Dataset #4 Barro Colorado Island, Lutz tower 48m_Solar Radiation, Pyranometer https://doi.org/10.5281/zenodo.3517272 https Related Software #1 Technical Note for the Functionally Assembled Terrestrial Ecosystem Simulator (FATES) https://doi.org/10.5281/zenodo.7684977 https Related Software #2 rgknox/E3SM: Manuscript Release - Knox et al. 2023 https://doi.org/10.5281/zenodo.7685350 https Related Software #3 rgknox/fates: Manuscript Release - FATES-CNP, Knox et al. 2023 (with scripts) Nutrient dynamics in a coupled terrestrial biosphere and land model (ELM-FATES-CNP) 2024-03-02T00:00:00Z publication https://n2t.org/ark:/85065/d75143d5 https://doi.org/10.1029/2023MS003689 Knox, R. G. author Koven, C. D. author Riley, W. J. author Walker, A. P. author Wright, S. J. author Holm, J. A. author Wei, X. author Fisher, R. A. author Zhu, Q. author Tang, J. author Ricciuto, D. M. author Shuman, Jacquelyn author Yang, X. author Kueppers, L. M. author Chambers, J. Q. author UCAR/NCAR - Library publisher We present a representation of nitrogen and phosphorus cycling in the Functionally Assembled Terrestrial Ecosystem Simulator, a demographic vegetation model within the Energy Exascale Earth System land model. This representation is modular, and designed to allow testing of multiple hypothetical approaches for carbon-nutrient coupling in plants. Novel model hypotheses introduced in this work include, (a) the controls on plant acquisition of aqueous mineralized nutrients in the soil and (b) fairly straight forward methods of allocating nutrients to specific plant organs and their losses through live plant turnover as well as litter fluxes generated through plant mortality. This combines the new with pre-existing hypotheses (such as nitrogen fixation and soil decomposition) into a system that can accommodate plant-soil dynamics for a large number of size- and functional-type-resolved plant cohorts within a time-since-disturbance-resolved ecosystem. Root uptake of nutrients is governed by fine root biomass, and plants vary in their fine root biomass allocation in order to balance carbon and nutrient limitations to growth. We test the sensitivity of the model to a wide range of parameter variations and structural representations, and in the context of observations at Barro Colorado Island, Panama. A key model prediction is that plants in the high-light-availability canopy positions allocate more carbon to fine roots than plants in low-light understory environments, given the widely different carbon versus nutrient constraints of these two niches within a given ecosystem. This model provides a basis for exploring carbon-nutrient coupling with vegetation demography within Earth system models. 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