The North American Carbon Program (NACP) is a multidisciplinary research program designed to improve understanding of North America's carbon sources, sinks, and stocks.
Dr. Anthony Walker installing an automated dendrometer on a Shagbark Hickory at ORNL. These devices take high frequency measurements of stem shrink and swell, providing data on wood growth and water transport through the tree. Credit: Dr. Jeff Warren.
Logo of the Ecological Forecasting Initiative.
Dr. Peter Thornton studies the interactions of land ecosystems with other components of the Earth's climate system including biogeochemical and physical land-atmosphere feedbacks, and interactions with human systems.
North American Forest Dynamics (NAFD) attribution type layer illustrating the type of change event where all events from 1986-2010 were combined. Source: Schleeweis et al. (2020) https://doi.org/10.3334/ORNLDAAC/1799
Four variables for the same 3-hour timestep, December 8, 2015, 12:00 AM to 3:00 AM, a) precipitation flux (kg m-2 s-1) b) air temperature (K) c) shortwave radiation flux (W m-2) d) specific humidity. Source: western_USA_precipitation_3hr_2015-12.nc4
Forested land in the western conterminous United States classified by priority for preservation to mitigate climate change, based on the spatial co-occurrence of vulnerability to drought and fire and potential carbon sequestration. Source: Buotte et al. 2020
A white spruce tree is instrumented with a hemispherical and field-stop photochemical reflectance index (PRI) sensor and point dendrometer at a northern treeline site along the Dalton Highway, Brooks Range, Alaska. Source: Eitel et al., 2020
The tree density per hectare is shown for different crown size classes: (a) 3-15 m2, (b) 15-50 m2, (c) 50-200 m2, (d) >200 m2. Source: Brandt et al. (2020)
Global monthly gross primary productivity (GPP) of biomass for December 2016.