Progress and Accomplishments
Database survey of key traits for improved modeling of Arctic vegetation
Successfully acquired LiDAR and photogrammetry data at centimeter resolution of the NGEE-Arctic Teller research site using an Unmanned Aerial System (UAS)
Data assimilation of the historical temperature observations is completed.
Coupled land surface-subsurface hydrogeophysical inverse modeling to estimate soil organic carbon content and explore associated hydrological and thermal dynamics in an Arctic tundra ecosystem
We develop and test a joint deterministic–stochastic inversion approach that can take advantage of time-lapse electrical resistivity and other data.
Microtopography determines how active layer depths respond to changes in temperature and precipitation at the NGEE-Arctic BEO sites
We applied a well-tested three-dimensional coupled biogeochemistry, hydrology, vegetation, and thermal model (ecosys) to polygonal tundra sites to quantify and scale the effects of microtopography on active layer depths.
Impacts of microtopographic snow-redistribution and lateral subsurface processes on hydrologic and thermal states in an Arctic polygonal ground ecosystem: Development and testing in the E3SM Land Model
The NGEE-Arctic and E3SM Land Model (ELM) groups recognize the importance of 3-dimensional processes, so we developed an ELM version that includes thermal and hydrological dynamics to investigate these processes at the BEO.
A newly published database of permafrost zone waterbodies with better than 5 m resolution will improve next-generation land model representations of high-latitude hydrology and biogeochemistry.
The differential free energy of activation in the transition state of Michaelis-Menten-Monod enzymatic reactions
A classical thermodynamic theory was extended to better characterize microbial process for integration with next generation land models.
Motivated by the strong N limitations in high-latitude systems, a comprehensive global analysis of nitrogen allocation in leaves was developed for integration in ESM-scale land models.