Modeling perennial bioenergy crops in the E3SM land model (ELMv2)
Journal Article
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· Journal of Advances in Modeling Earth Systems
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
- Pacific Northwest National Lab. (PNNL), College Park, MD (United States); National Aeronautics and Space Administration (NASA), Washington, DC (United States)
- Pacific Northwest National Lab. (PNNL), College Park, MD (United States)
- Argonne National Lab. (ANL), Lemont, IL (United States)
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sandia National Lab. (SNL-CA), Livermore, CA (United States)
- Pacific Northwest National Lab. (PNNL), Richland, WA (United States); National Univ. of Singapore (Singapore)
- Univ. of Illinois at Urbana-Champaign, IL (United States); US Dept. of Agriculture (USDA), Urbana, IL (United States). Agricultural Research Service (ARS)
- Univ. of Illinois at Urbana-Champaign, IL (United States); Univ. of Western Australia, Crawley, WA (Australia)
Perennial bioenergy crops are increasingly important for the production of ethanol and other renewable fuels, and as part of an agricultural system that alters the climate through its impact on biogeophysical and biogeochemical properties of the terrestrial ecosystem. Few earth system models (ESMs) represent such crops, however. In this study, we expand the Energy Exascale Earth System Model (E3SM) Land Model (ELMv2) to include perennial bioenergy crops with a high potential for mitigating climate change. We focus on high-productivity miscanthus and switchgrass, estimating various parameters associated with their different growth stages and performing a global sensitivity analysis to identify and optimize these parameters. The sensitivity analysis identifies five parameters associated with phenology, carbon/nitrogen allocation, stomatal conductance, and maintenance respiration as the most sensitive parameters for carbon and energy fluxes. We calibrated and validated the model against observations and found that the model closely captures the observed seasonality and the magnitude of carbon fluxes. The validated model represents the latent heat flux fairly well, but sensible heat flux for miscanthus is not well captured. Finally, we validated the model against observed leaf area index (LAI) and harvest amount and found modeled LAI captured observed seasonality , although the model underestimates LAI and harvest amount. This work provides a foundation for future ESM analyses of the interactions between perennial bioenergy crops and carbon, water, and energy dynamics in the larger earth system, and sets the stage for studying the impact of future biofuel expansion on climate and terrestrial systems.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States); Argonne National Laboratory (ANL), Lemont, IL (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); Pacific Northwest National Laboratory (PNNL), Richland, WA (United States); Sandia National Laboratories (SNL-CA), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC), Biological and Environmental Research (BER)
- Grant/Contract Number:
- AC02-06CH11357; AC05-00OR22725; NA0003525
- OSTI ID:
- 1909077
- Alternate ID(s):
- OSTI ID: 2378021
OSTI ID: 1924515
- Report Number(s):
- PNNL-SA-164323
- Journal Information:
- Journal of Advances in Modeling Earth Systems, Journal Name: Journal of Advances in Modeling Earth Systems Journal Issue: TBD Vol. TBD; ISSN 1942-2466
- Publisher:
- American Geophysical Union (AGU)Copyright Statement
- Country of Publication:
- United States
- Language:
- English