2019 Graduate Student Showcase

Title of Submission

Sensitivity of Energy, Water, and Nutrient Cycles to Microtopographic Parameters in ELM

Degree Program

Geosciences, PhD

Major Advisor Name

Nancy Glenn

Type of Submission

Scholarly Poster


Northern peatlands are a major component of the global carbon cycle, and as the climate warms, are expected to experience a positive feedback loop between atmospheric CO2 and C emissions. Carbon dynamics in peatlands are not well simulated in land surface models, and are influenced by small-scale variations in elevation (microtopography). Here we test the sensitivity of a suite of output variables associated with energy, water, and nutrient cycles to uncertain microtopographic parameters in the land surface model in E3SM (ELM). Net ecosystem exchange, the flux of CO2 between the land and atmosphere, was highly influenced by microtopographic parameters.

Funding Information

This material is based upon work supported by the U.S. Department of Energy, Office of Science, Office of Biological and Environmental Research. Oak Ridge National Laboratory is managed by UT-Battelle, LLC, for the U.S. Department of Energy under contract DE-AC05-00OR22725.

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