Skip to main content



Mean daily daytime average CO2 concentration [ppm] in the boundary layer in June 2010 from the WRF model.

CO2 Concentrations Across North America

New model outputs from the Penn State WRF-Chem version of the Weather Research and Forecasting (WRF) model estimate the hourly CO2 concentration in the atmosphere.

Fluxes of carbon dioxide observed during airborne sampling over the Harvard Forest site on June 1, 2014.

Carbon flux measurements from AirMOSS

New data from NASA's Airborne Microwave Observatory of Subcanopy and Subsurface (AirMOSS) investigation examines carbon fluxes at Duke, Harvard, and Howland Forests.

Aboveground live biomass in the year 2000 (from Zarin et al., 2016).

Biomass loss due to tropical deforestation

New maps show the degree of deforestation in tropical America, Africa, and Asia between 2000 and 2012 and provide estimates of aboveground live biomass loss.

The ORNL DAAC mission is to assemble, distribute, and provide data services for a comprehensive archive of terrestrial biogeochemistry and ecological dynamics observations and models to facilitate research, education, and decision-making in support of NASA’s Earth science. Read more about the ORNL DAAC.