Site: Harvard Forest LTER

Photo shows the NEON and EMS towers as viewed from the Harvard Forest walk-up tower.
Credit: David R. Foster- Harvard Forest Archives

Contradictory to theoretical models, forest carbon uptake has accelerated over recent decades in maturing forests, a legacy of 19th century land use, and to a lesser degree, modern increases in atmospheric CO2, nitrogen deposition, temperature, and precipitation. This and many other insights into forest ecosystem function have resulted from sustained measurements of biosphere-atmosphere exchanges at HFR’s Environmental Monitoring Site (EMS) eddy flux tower, which provides the world’s longest record of CO2 fluxes in a forest ecosystem. It is also the founding prototype for the AmeriFlux network and National Ecological Observation Network (NEON).