Research Areas research areas


  • My main research objective is to quantify the response of northern ecosystems to environmental changes resulting from factors such as climate warming, permafrost thaw, longer duration of soil thaw, and interannual variability. I am particularly interested in the interactions between carbon (C) and nitrogen (N) cycles in plants and soils, especially in cold environments, like tundra and boreal regions. I use several different approaches to study the C and N cycles: field observations, field experiments, laboratory experiments, modeling, and data synthesis. I really enjoy data analysis and writing. In my free time, I enjoy outdoor adventures & traveling.
  • Publications

    Academic Article

    Year Title
    2019 Ecosystem carbon response of an Arctic peatland to simulated permafrost thaw.Global Change Biology.  25:1746-1764. 2019
    2019 Widespread global peatland establishment and persistence over the last 130,000 y.Proceedings of the National Academy of Sciences of the United States of America.  116:4822-4827. 2019
    2018 Tundra landscape heterogeneity, not interannual variability, controls the decadal regional carbon balance in the Western Russian Arctic.Global Change Biology.  24:5188-5204. 2018
    2018 Nongrowing season methane emissions-a significant component of annual emissions across northern ecosystems.Global Change Biology.  24:3331-3343. 2018
    2018 Near-surface permafrost aggradation in Northern Hemisphere peatlands shows regional and global trends during the past 6000 yearsHolocene.  28:998-1010. 2018
    2018 A North American Hydroclimate Synthesis (NAHS) of the Common EraGlobal and Planetary Change.  162:175-198. 2018
    2017 The positive net radiative greenhouse gas forcing of increasing methane emissions from a thawing boreal forest-wetland landscape.Global Change Biology.  23:2413-2427. 2017
    2017 Rapid carbon loss and slow recovery following permafrost thaw in boreal peatlands.Global Change Biology.  23:1109-1127. 2017
    2016 Potential carbon emissions dominated by carbon dioxide from thawed permafrost soilsNature Climate Change.  6:950-+. 2016
    2016 Longer thaw seasons increase nitrogen availability for leaching during fall in tundra soilsEnvironmental Research Letters.  11:064013-064013. 2016
    2016 Effects of permafrost aggradation on peat properties as determined from a pan-Arctic synthesis of plant macrofossilsJOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES.  121:78-94. 2016
    2015 A simplified, data-constrained approach to estimate the permafrost carbon-climate feedback.Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences.  373:20140423-20140423. 2015
    2015 A pan-Arctic synthesis of CH4 and CO2 production from anoxic soil incubations.Global Change Biology.  21:2787-2803. 2015
    2015 A pan-Arctic synthesis of CH4 and CO2 production from anoxic soil incubations.Global Change Biology.  21:2787-2803. 2015
    2015 Climate change and the permafrost carbon feedback.Nature Nature: New biology.  520:171-179. 2015
    2015 Biodegradability of dissolved organic carbon in permafrost soils and aquatic systems: a meta-analysisBiogeosciences.  12:6915-6930. 2015
    2014 Temperature and peat type control CO2 and CH4 production in Alaskan permafrost peats.Global Change Biology.  20:2674-2686. 2014
    2013 CARBON STORAGE A permafrost carbon bomb?Nature Climate Change.  3:865-867. 2013
    2013 Response of anaerobic carbon cycling to water table manipulation in an Alaskan rich fenSoil Biology and Biochemistry.  58:50-60. 2013
    2013 Modelling the effects of climate change and disturbance on permafrost stability in northern organic soilsMires and Peat.  12. 2013
    2011 Peatlands in the Earth's 21st century climate systemEnvironmental Reviews.  19:371-396. 2011
    2011 Soil temperature response to 21st century global warming: the role of and some implications for peat carbon in thawing permafrost soils in North AmericaEarth System Dynamics.  2:121-138. 2011
    2008 Short-term response of methane fluxes and methanogen activity to water table and soil warming manipulations in an Alaskan peatlandJournal of Geophysical Research.  113. 2008
    2007 Historical influences on the vegetation and soils of the Martha's Vineyard, Massachusetts coastal sandplain: Implications for conservation and restorationBiological Conservation.  136:17-32. 2007
    2007 Timescale dependence of environmental and plant-mediated controls on CH4 flux in a temperate fenJournal of Geophysical Research.  112. 2007

    Education And Training

  • B.A. Environmental Studies, Mount Holyoke College
  • M.S. Earth Sciences, University of New Hampshire
  • Ph.D. Earth & Environmental Science, University of New Hampshire
  • Full Name

  • Claire Treat