People

Ruth Varner: Research Assistant Professor, UNH

I study the exchange of radiatively important trace gases (carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O) and methyl halides) between terrestrial and marine ecosystems and the atmosphere. Through the use of both manual and automated chambers, we are able to measure the flux of these gases in wetlands, coastal waters and forest ecosystems, and make comparisons to atmospheric measurements. Over time, we have a better understanding of ecosystem responses to environmental factors such as temperature and precipitation—important relationships in our changing climate. I am also actively involved in UNH's TESSE program for middle and high school Earth Science teachers.
Contact: ruth.varner@unh.edu

Jill Bubier: Associate Professor, Mount Holyoke College

The main objective of my research program is to improve our understanding of feedbacks between peatland ecosystems and the atmosphere in response to global climate change and increasing atmospheric nitrogen deposition through a combination of research and educational activities with undergraduate women students at Mount Holyoke College and collaborations with peatland scientists in Canada, U.S. and Finland. Measurements include CO2 and CH4 gas exchange using manual and automatic chambers, plant production and decomposition experiments, a fertilization experiment to test the response of ecosystems to nitrogen and phosphorus additions, and monitoring plant community and environmental parameters.
Contact: jbubier@mtholyoke.edu

Patrick Crill: Professor of Geochemistry, Stockholm University

My current research interests focus on the biogeochemical dynamics of atmosphere/biosphere interaction. How does the biological mediation of geochemical cycles affect the distribution of mass on the surface of our planet and how does that interaction feedback upon the Earth's physical processes. We want to make local scale experiments that are relevant to the extrapolation and quantification of micro scale processes to the planetary macroscale. We have studied the production, consumption and exchange of trace gases between the biosphere and the troposphere; especially methane (CH4), carbon dioxide (CO2), nitrogen oxides (N2O, NO) and methyl bromide (CH3Br).
Contact: patrick.crill@geo.su.se

Steve Frolking: Research Associate Professor, UNH

My research interests are in the general area of trace gas biogeochemistry and environmental controls on gas fluxes. Specific projects include modeling peatland CO2 and CH4 exchange and long-term C accumulation, modeling C and N biogeochemistry in agro-ecosystems, remote sensing of landscape freeze/thaw, developing land-use maps at national to global scales, and pan-arctic hydrological modeling.
Contact: steve.frolking@unh.edu

Michael Keller: Chief of Science, National Ecological Observatory Network

I study the effects of land use change and agricultural intensification in Central and South America on the function of ecosystems and the control of atmospheric chemistry and composition. My research ranges from the biological controls of trace gas emissions at the organismal level to the estimation and modeling of regional and global trace gas and carbon budgets.
Contact: mkeller@neoninc.org

Erik Froburg: Education Coordinator

I work with both K-12 and non-formal educators to bring authentic, research-based science curricula into classrooms and other learning environments. I have a particular interest in student-guided inquiry and in expanding the role of the University in educational outreach.
Contact: erik.froburg@unh.edu

Collaborators

Changsheng Li: Research Professor, UNH

Changsheng Li has been focusing on development of biogeochemical models for terrestrial ecosystems since 1989. The models are being used for estimating regional inventory of trace gas emissions as well as for testing impacts of climate change or alternative management on ecosystem productivity, carbon sequestration, and trace gas emissions for cropland and forests in North America, Europe, Asia and Australia. The DNDC series models are available online.
Contact: changsheng.li@unh.edu

Karen Bartlett: Research Scientist

I'm interested in the interactions between the biosphere and the atmosphere, particularly the magnitude of and controls on trace gas emissions (primarily methane) and the sources of variability in atmospheric levels of methane. Most of my work has focused on the role of natural wetlands as sources of methane. Contact: karen.bartlett@unh.edu