These projects have been funded from a variety of sources, including DOE Terrestrial Carbon Program, NASA Terrestrial Ecosystem Program, and others. Please read our Statement of Fair Use before proceeding to the data below.
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The data contained on this site is freely available and we encourage others to use it. Kindly keep us informed of how you are using our data and of any publication plans. Please acknowledge the data source as a citation, or in the acknowledgments if the data have not yet been published. If we feel that we should be offered participation as authors, we will let you know and we assume that an agreement on such matters will be reached prior to publishing the data. If your work directly competes with our analysis we may ask that we have the opportunity to submit a manuscript before you submit one that uses unpublished data. These data may be updated or reprocessed from time to time, and it is your responsibility to insure that your publication contains the most recent revision of the data.
In order to maintain these measurements we periodically need to demonstrate progress to our sponsoring agencies. In addition to informing us of your plans, we kindly request that you help us by providing preprints and updates on publication status.
Harvard University Atmospheric Sciences, Wofsy Group
Continuous eddy-correlation flux measurements of sensible heat, latent heat, CO2, and momentum have been made at a black spruce forest located at 55.879° N, -98.484° W since the Spring of 1994 and will continue indefinitely. The principal objective is to determine directly the net ecosystem exchange of CO2 and the surface energy budget over diurnal, seasonal, and annual time scales and to couple these observations with a comprehensive characterization of the physical environment (PAR, soil temperature, etc.). In addition, CO2 and water vapor concentration throughout the forest column have been measured. This suite of long-term measurements provides information to assess the affect of seasons and seasonal changes on the carbon balance of the forest. Determination of the boundary layer CO2 concentration anomaly can also be determined, and thus the affect of the forest on the boundary layer CO2 concentration can be studied. Also see our Boreal Forest EMS home page.
Harvard University and University of New Hampshire
10 automated chambers were constructed at a black spruce forest located at 55.879° N, -98.484° W in 1995 and operated continuously throughout the growing seasons of 1995 and 1996. The chambers collected CO2 flux information in areas of sphagnum or feather moss cover.