The Harvard Forest Carbon Experiment: A PAC Reference Node


How Does PAC Verify Carbon Measurement Methodology and Data Processing?

PAC has partnered with Harvard University, Dept. of Earth and Planetary Science, as a forest system model for instrumentation, data analysis and serves as the primary reference node for PAC field deployments. While the HF is primarily forested, the same methods apply to any terrestrial site including farmland. 


The Harvard Forest is the most extensively studied and instrumented forest in the world and is also the longest running now at 29 years. Studies of soil carbon sequestration and the impacts of soil heating, application of soil amendments, and other experimental treatments have been extensively published offering key insights into the uncertainties of soil carbon sequestration as applied to commercial products. 


The Harvard Forest "Carbon Ticker" shows daily data for net forest carbon sequestration, demonstrating the reality of science-based methods as applied to the commercial sector. The HF Ticker can be viewed here:


- The HF 28-year record, the longest in existence, suggests that US New England  forests sequester carbon on a net basis, averaging  3.67 tCO2 acre-1 yr-1, compared to 2tCO2 acre-1 yr-1 used in PAC forest carbon revenue projections.

- The HF project, if monetized, would have yielded  ~$329 million (28-years, based on 100,000 acre extrapolation, pre-tax, gross revenue).

- The HF record supports the financialization of forest carbon data and a pilot project of 50,000 acres, pending. 

- The PEM approach can be applied to any terrestrial project anywhere. 


To learn more about the Harvard Forest Carbon Experiment please visit:

HF publications can be found here: