Sallie's Fen

Sallie's Fen produces unique multi-year datasets of consistent trace gas (CH4 & CO2) flux and meteorological measurements across a poor fen complex. Measurements of plant biomass and phenology, along with those from automatic CO2 flux chambers, have provided an even more comprehensive look at Sallie's Fen. Such datasets are the only way to assess the long-term integrated ecosystem response to a changing climate. Data from Sallie's Fen is continually updated, and accessible by the public. Dr. Ruth Varner can be contacted for further information. The collection of this data has been supported most recently through NSF’s Long Term Research in Environmental Biology: DEB- 0316326 “LTREB: Climatic and Biological Controls on the Carbon Gas Flux of a Temperate Peatland”. PI Patrick Crill. As part of our ongoing involvement with grade 6-12 education, we also provide resources for inquiry-based investigations based on the data collected at Sallie's Fen.

Bartlett Experimental Forest

Automated measurement of CO2 flux from the forest floor at Bartlett Experimental Forest began in June of 2007. These measurements are in support of the NSF funded project "Collaborative Research: Relationship between Carbon Allocation to Mycorrhizal Fungi and Organic Nitrogen Use in Temperate Forests" DEB-0614266 with PI Erik Hobbie and co-PIs Serita Frey and Scott Ollinger. Carbon dioxide flux data from 5 autochambers for 2007 and 2008 is available. Questions can be directed to Dr. Ruth Varner.

Harvard Forest

We began making continuous measurements of the soil CO2 exchange along a soil moisture gradient near the Harvard Forest tower flux site in April 2003. Automated chamber flux systems provide independent, accurate, and simultaneous measurement of diurnal CO2 efflux, and therefore a means to quantitatively partition the components of the net efflux. By doing so it also provides a means to evaluate the eddy-flux measurements at the Harvard Forest Environmental Measurement Site. Data collected at Harvard Forest is available online, as are publications related to this project. Questions can be directed to Dr. Ruth Varner.


We have studied the soil exchange of carbon dioxide, nitrous oxide and methane from natural and selectively logged forest sites. Data is available online and related publications are listed LBA-ECO is part of the Brazilian led LBA project.

Abisko, Sweden