Ruth Varner

Ruth Varner photo
Director, Joan and James Leitzel Center for Mathematics, Science and Engineering Education
Phone: (603) 862-0853
Office: Earth Systems Research Center, Morse Hall Rm 450, Durham, NH 03824
Pronouns: She/her/hers

Ruth Varner is a Professor in the Earth Systems Research Center of the Institute for the Study of Earth, Oceans, and Space, and in the Department of Earth Sciences. She is also the Director of the Joan and James Leitzel Center for Mathematics, Science, and Engineering Education at the University of New Hampshire. Her research is on trace gas emissions from terrestrial, aquatic and human-managed ecosystems. In her early career she focused on developing novel methods to measure very low-concentration, reactive halogenated trace gases. Over the past several decades she has established and maintained long-term measurements of methane emissions from wetlands and permafrost peatlands. She currently collaborates with microbial ecologists, remote sensing specialists, and modelers to address questions of scaling processes from regions to the globe. She integrates graduate and undergraduate students into her research and outreach. As the Director of UNH’s Leitzel Center, she develops and participates in professional development for K-12 STEM teachers. She has served as the Director of the NSF REU Northern Ecosystems Research for Undergraduates program. She is currently the Director of the Collaborative Links to Ocean Science and Earth Science Graduate Academic Programs (CLOSES-GAP), an NSF GEOPATHS program collaborative with minority-serving institutions to broaden participation in the geosciences by engaging undergraduate students from traditionally underrepresented groups.

Courses Taught

  • 642: Biogeosci Earth System
  • 997: Seminar in Earth Sciences
  • ESCI 534: Techniques Environmental Sci
  • ESCI 642: Biogeosci Earth System
  • INCO 790: Adv Rsrch Exp/Earth Sciences


  • Ph.D., Earth Sciences, University of New Hampshire
  • Ph.D., Geochemistry, University of New Hampshire
  • M.S., Hydrology&Water Resources Sci., University of New Hampshire
  • B.A., Geology/Earth Science, Hartwick College

Selected Publications

  • Hough, M., McCabe, S., Vining, S. R., Pedersen, E. P., Wilson, R. M., Lawrence, R., . . . Rich, V. I. (2022). Coupling plant litter quantity to a novel metric for litter quality explains C storage changes in a thawing permafrost peatland. GLOBAL CHANGE BIOLOGY, 28(3), 950-968. doi:10.1111/gcb.15970

  • Varner, R. K., Crill, P. M., Frolking, S., McCalley, C. K., Burke, S. A., Chanton, J. P., . . . Coordinators, I. P. (2022). Permafrost thaw driven changes in hydrology and vegetation cover increase trace gas emissions and climate forcing in Stordalen Mire from 1970 to 2014. PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES, 380(2215). doi:10.1098/rsta.2021.0022

  • Holmes, M. E., Crill, P. M., Burnett, W. C., McCalley, C. K., Wilson, R. M., Frolking, S., . . . Chanton, J. P. (2022). Carbon Accumulation, Flux, and Fate in Stordalen Mire, a Permafrost Peatland in Transition. GLOBAL BIOGEOCHEMICAL CYCLES, 36(1). doi:10.1029/2021GB007113

  • Robison, A. L., Wollheim, W. M., Turek, B., Bova, C., Snay, C., & Varner, R. K. (2021). Spatial and temporal heterogeneity of methane ebullition in lowland headwater streams and the impact on sampling design. LIMNOLOGY AND OCEANOGRAPHY, 66(12), 4063-4076. doi:10.1002/lno.11943

  • Olefeldt, D., Hovemyr, M., Kuhn, M. A., Bastviken, D., Bohn, T. J., Connolly, J., . . . Watts, J. D. (2021). The Boreal-Arctic Wetland and Lake Dataset (BAWLD). EARTH SYSTEM SCIENCE DATA, 13(11), 5127-5149. doi:10.5194/essd-13-5127-2021

  • Wik, M., Varner, R. K., Anthony, K. W., MacIntyre, S., & Bastviken, D. (2016). Climate-sensitive northern lakes and ponds are critical components of methane release. NATURE GEOSCIENCE, 9(2), 99-+. doi:10.1038/NGEO2578

  • Treat, C. C., Wollheim, W. M., Varner, R. K., Grandy, A. S., Talbot, J., & Frolking, S. (2014). Temperature and peat type control CO2 and CH4 production in Alaskan permafrost peats. GLOBAL CHANGE BIOLOGY, 20(8), 2674-2686. doi:10.1111/gcb.12572

  • Silver, W. L., Thompson, A. W., McGroddy, M. E., Varner, R. K., Dias, J. D., Silva, H., . . . Keller, M. (2005). Fine root dynamics and trace gas fluxes in two lowland tropical forest soils. GLOBAL CHANGE BIOLOGY, 11(2), 290-306. doi:10.1111/j.1365-2486.2005.00903.x

  • Bubier, J. L., Crill, P. M., Moore, T. R., Savage, K., & Varner, R. K. (1998). Seasonal patterns and controls on net ecosystem CO2 exchange in a boreal peatland complex. GLOBAL BIOGEOCHEMICAL CYCLES, 12(4), 703-714. doi:10.1029/98GB02426

  • SHORTER, J. H., KOLB, C. E., CRILL, P. M., KERWIN, R. A., TALBOT, R. W., HINES, M. E., & HARRISS, R. C. (1995). RAPID DEGRADATION OF ATMOSPHERIC METHYL-BROMIDE IN SOILS. NATURE, 377(6551), 717-719. doi:10.1038/377717a0