Tim Griffis

Professor of Biometeorology

Current Research Interests

My research aims to improve the scientific understanding of the biophysical mechanisms that govern the exchange of energy and mass between the Earth's surface and the lower atmosphere. At this interface the processes are highly complex requiring a multidisciplinary approach that draws on knowledge from boundary layer meteorology, atmospheric chemistry, ecophysiology, hydrology, and soil science. In my view, Biometeorology represents the intersection of these disciplines and has become an integral component of global change research. The underlying theory and methodological approaches allow inquiry at the leaf to regional scale, which is essential to understanding how natural and anthropogenic environmental change influence the Earth-Atmosphere system. Humans have great capacity to alter the atmospheric composition and land surface characteristics. The exact consequences of these changes to weather, climate, environmental quality, and human health continue to be the subject of much debate and uncertainty. I aim to reduce these uncertainties by advancing the science of Biometeorology through innovative research and teaching. Current research interests include:

  1. Biogeochemical and biogeophysical forcings associated with agriculture and natural ecosystems
  2. Development of micrometeorological and optical stable isotope techniques to trace the flow of carbon and water between the land and atmosphere
  3. Impacts of land use and climate variation on ecosystem and regional 13C-CO2 and 18O-CO2 discrimination and isotope disequilibrium
  4. Influence of atmospheric circulation and land surface characteristics on trends in atmospheric water vapor and its isotope composition
  5. Biophysical modeling of land-atmosphere isotopic CO2 and water vapor exchange

Teaching

  • ESPM3000: Climate Change: Myths, Mysteries, and Uncertainties
  • ESPM4903: Directed Research in Atmospheric Science - undergraduate level
  • ESPM 5402: Biometeorology and Boundary Layer Climates
  • LAAS8195: Directed Research in Atmospheric Science - graduate level

Professional Activities and Service

Society Memberships

  • American Geophysical Union
  • American Meteorological Society

Editorial

  • Associate Editor, Agricultural and Forest Meteorology (2008-present)
  • Editorial Board, Atmosphere (2014-present)
  • Associate Editor, Journal of Geophysical Research Biogeosciences (2007-2011)

National Advisory Committees and Affiliations

  • National Ecological Observatory Network (NEON), Fundamental Instrument Unit Technical Working Group, 2009- present
  • Affiliate Member of the Yale-Nanjing University of Information Science and Technology (NUIST) Center on Atmospheric Environment , 2014-present
  • Member, American Meteorological Society - Board on Atmospheric Biogeosciences, January 2015 - present

http://www.swac.umn.edu/directory/faculty/timothy-griffis

 

photo of Tim Griffis