
- BS, Brock University, St. Catharines, Ontario - 1995
- PhD, McMaster University, Hamilton, Ontario - 2000
Areas of Interest
Atmosphere-Biosphere Interactions, Biogeochemistry, Biometeorology
Teaching
- ESPM3777: Climate Change: Physics, 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
Research
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.
Current research interests include:
- Development of micrometeorological and optical stable isotope techniques to trace the flow of carbon, nitrogen, and water between the land and atmosphere
- Reactive nitrogen cycling at the biosphere-atmosphere interface
- Methane and carbon dioxide budgets of tropical and temperate peatlands
- Biophysical modeling of land-atmosphere trace gas exchange
- Atmospheric transport and fate of herbicides/pesticides
- Boundary-layer inverse analyses
Select Publications
"A Large Amazonian peatland carbon sink was eliminated by photoinhibition of photosynthesis and amplified ecosystem respiration", J.D. Wood, D.T. Roman, T.J. Griffis, et al., (Geophysical Research Letters, 2025, 52, e2025GL114642)
"Isotopic constraints on nitrous oxide emissions from the US Corn Belt", T.J. Griffis, Z. Yu, J.M. Baker, and D.B. Millet (Geophysical Research Letters, 2024, 51, e2024GL109623. https://doi.org/10.1029/2024GL109623)
"Hydrologic connectivity regulates riverine N2O sources and dynamics", M. Hu, Z. Yu, T.J. Griffis, W.H. Yang, J. Mohn, D.B. Millet, J.M. Baker, and D. Wang (Environmental Science & Technology, 2024, 58, 22, 9701-9713, https://doi.org/10.1021/acs.est.4c01285)
"Evaluation and improvement of the E3SM land model for simulating energy and carbon fluxes in an Amazonian peatland", F. Yuan et al., (Agricultural and Forest Meteorology, 2023, 332, 109364)
"A coupled equilibrium boundary layer model with stable water isotopes and its application to local water recycling", K. Xiao, T.J. Griffis, X. Lee, W. Xiao, and J.M. Baker (Agricultural and Forest Meteorology, 2023, 339, 109572, https://doi.org/10.1016/j.agrformet.2023.109572)
"Warming response of peatland CO2 sink is sensitive to seasonality in warming trends", Helbig, M., Živković, T., Alekseychik, P., Aurela, M., El-Madany, T. S., Euskirchen, E. S., Flanagan, L. B., Griffis, T.J., Hanson, P.J., Hattaka, J., Helfter, C., Hirano, T., Humphreys, E., Kiely, G., Kolka, R., Laurila, T., Leahy, P., Lohila, A., Mammarella, I., Nilsson, M., Panov, A., Parmentier, F. J. W., Peichl, M., Rinne, J., Roman, D., Sonnentag, O., Tuittila, E.-S., Ueyama, M., Vesala, T., Vestin, P., Weldon, S., Weslien, P. and S. Zaehle, S (Nature Climate Change, 2022, 10.1038/s41558-022-01428-z)
"Response of nitrous oxide emissions to individual rain events and future changes in precipitation", L.T. Miller, T.J. Griffis, M. D. Erickson, P.A. Turner, M.J. Deventer, Z. Chen, Z. Yu, R.T. Venterea, J.M. Baker, and A. L. Frie (Journal of Environmental Quality, 2022, 51, 312-324)
- "Seasonal variations of CH4 emissions in the Yangtze River Delta region of China are driven by agricultural activities", W. Huang, T.J. Griffis, C. Hu, W. Xiao, and X. Lee (Advances in Atmospheric Sciences, 2021, 38, 1537-1551)
- "Warming temperatures lead to reduced summer carbon sequestration in the U.S. corn belt" Z. Yu, T.J. Griffis, and J.M. Baker (Communications, Earth, & Environment, 2021, 2, 53, https://doi.org/10.1038/s43247-021-00123-9)
- "A multi-year constraint on ammonia emissions and deposition within the U.S. Corn Belt", C. Hu, T.J. Griffis, A. Frie, J.M. Baker, J.D. Wood, D.B. Millet, Z. Yu, X. Yu, and A.C. Czarnetzki (Geophysical Research Letters, 2021, 48, e2020GL090865. https://doi.org/10.1029/2020GL090865)
- "Biases in open-path carbon dioxide flux measurements: Roles of instrument surface heat exchange and analyzer temperature sensitivity", M.J. Deventer, D.T. Roman, I. Bogoev, R. K. Kolka, >M. Erickson, X. Lee, J.M. Baker, D.B. Millet, and T.J. Griffis (Agricultural and Forest Meteorology, 2021, 296, 108216)
- "Nitrogen management and air quality in China" T.J. Griffis and J.M. Baker (Nature Food, 2020, Invited News & Views, 1, 597-598, https://doi.org/10.1038/s43016-020-00167-8)
- "Hydrometeorological sensitivities of net ecosystem carbon dioxide and methane exchange of an Amazonian palm swamp peatland", T.J. Griffis, D.T. Roman, J.D. Wood, J. Deventer, L. Fachin, J. Rengifo, D. Del Castillo, E. Lilleskov, R. Kolka, R.A. Chimner, J. del Aguila-Pasquel, C. Wayson, K. Hergoualc’h, J. M. Baker, H. Cadillo-Quiroz and D.M. Ricciuto (Agricultural and Forest Meteorology, 2020, 295, 108167, https://doi.org/10.1016/j.agrformet.2020.108167)
- "Nitrous oxide emissions are enhanced in a warmer and wetter world", T.J. Griffis, Z. Chen, J.M. Baker, J.D. Wood, D.B. Millet, X. Lee, R.T. Venterea, and P.A. Turner, (Proceedings of the National Academy of Sciences of the United States of America, 2017, 114(45), 12081-12085, https://doi.org/10.1073/pnas.1704552114)
- "OCO-2 advances photosynthesis observation from space via solar-induced chlorophyll fluorescence", Y. Sun, C. Frankenberg, J. D. Wood, D. S. Schimel, M. Jung, L. Guanter, D. T. Drewry, M. Verma, A. Porcar-Castell, T. J. Griffis, L. Gu, T. S. Magney, P. Köhler, B. Evans, and K. Yuen (Science, 2017, 358 (6360), eaam5747, doi: 10.1126/science.aam5747)
- "Multi-scale analyses of solar induced fluorescence and gross primary production", J.D. Wood, T.J. Griffis, J.M. Baker, C. Frankenberg, M. Verma, and K. Yuen (Geophysical Research Letters, 2017, 44, 533-541, doi: 10.1002/2016GL070775)
- "Regional-scale controls on dissolved nitrous oxide in the Upper Mississippi River", P.A. Turner, T.J. Griffis, J.M. Baker, X. Lee, J.T. Crawford, L.C. Loken, and R.T. Venterea (Geophysical Research Letters, 2016, 43, 4400-4407, DOI: 10.1002/2016GL068710)
- "Investigating the source, transport, and isotope composition of water vapor in the planetary boundary layer", T.J. Griffis, J.D. Wood, J.M. Baker, X. Lee, K. Xiao, Z. Chen, L.R. Welp, N. Schultz, G. Gorski, M. Chen, and J. Nieber (Atmospheric Chemistry and Physics, 2016, 16, 5139-5157, doi:10.5194/acp-16-5139-2016)
- "Indirect nitrous oxide emissions from streams within the US Corn Belt scale with stream order", P.A. Turner, T.J. Griffis, X. Lee, J.M. Baker, R.T. Venterea, and J.D. Wood (Proceedings of the National Academy of Sciences of the United States of America, 2015, 112, 9839-9843, doi: 10.1073/pnas.1503598112)
- "Detecting drift bias and exposure errors in historical solar and photosynthetically active radiation data", J.D. Wood, T.J. Griffis and J.M. Baker (Agricultural and Forest Meteorology, 2015, 206, 33-44, doi: 10.1016/j.agrformet.2015.02.015)
- "Simulating crop phenology in the Community Land Model and its impact on energy and carbon fluxes", M. Chen, T.J. Griffis, J.M. Baker, J. Wood, and K. Xiao (Journal of Geophysical Research - Biogeosciences, 2015, 120, 310-325, doi: 10.1002/2014JG002780)
- "Global and time-resolved monitoring of crop photosynthesis with chlorophyll fluorescence", Guanter et al., (Proceedings of the National Academy of Sciences of the United States of America, 2014, 111 (14) E1327-E1333)
- "Reconciling the differences between top-down and bottom-up estimates of nitrous oxide emissions for the US Corn Belt", T.J. Griffis, X. Lee, J.M. Baker, M.P. Russelle, X. Zhang, R. Venterea, and D.B. Millet (Global Biogeochemical Cycles, 2013, 27, doi: 10.1002/gbc.20066)
- "Interannual, seasonal, and retrospective analysis of the methane and carbon dioxide budgets of a temperate peatland", D. Olson, T.J. Griffis, A. Noormets, R. Kolka and J. Chen (Journal of Geophysical Research - Biogeosciences, 2013, 118, 226-238, doi: 10.1002/jgrg.20031)
- "Tracing the flow of carbon dioxide and water vapor between the biosphere and atmosphere: A review of optical isotope techniques and their application", T.J. Griffis (Agricultural and Forest Meteorology, 2013, 174-175, 85-109, doi: 10.1016/j.agrformet.2013.02.009)
- "Oxygen isotope composition of evapotranspiration and its relation to C4 photosynthetic discrimination” T.J. Griffis, X. Lee, J.M. Baker, K. Billmark, N. Schultz, M. Erickson, X. Zhang, J. Fassbinder, W. Xiao, and N. Hu (Journal of Geophysical Research - Biogeosciences, 2011, 116, G01035, doi: 10.1029/2010JG001514)
- “Influence of C4 vegetation on 13CO2 discrimination and isotopic forcing in the Upper Midwest, United States”, T.J. Griffis, J.M. Baker, S.D. Sargent, M. Erickson, J. Corcoran, M. Chen, and K. Billmark (Global Biogeochemical Cycles, 2010, 24, GB4006, doi:10.1029/2009GB003768)
- "Determining the oxygen isotope composition of evapotranspiration using eddy covariance", T.J. Griffis, S.D. Sargent, X. Lee, J.M. Baker, J. Greene, M. Erickson, X. Zhang, K. Billmark, N. Schultz, W. Xiao, and N. Hu (Boundary-Layer Meteorology, 2010, doi: 10.1007/s10546-010-9529-5, 137(2), 307-326)
- "Canopy-scale kinetic fractionation of atmospheric carbon dioxide and water vapor isotopes", X. Lee, T.J. Griffis, J.M. Baker, K.A. Billmark, K. Kim, L.R. Welp (Global Biogeochemical Cycles, 2009, 23, GB1002, doi:10.1029/2008GB003331)
- "Direct Measurement of Biosphere-Atmosphere Isotopic CO2 Exchange using the Eddy Covariance Technique", T.J. Griffis, S.D. Sargent, J.M. Baker, X. Lee, B.D. Tanner, J. Greene, E. Swiatek, and K. Billmark (Journal of Geophysical Research- Atmospheres, 2008, 113, D08304,doi:10.1029/2007JD009297).
- "Using Continuous Stable Isotope Measurements to Partition Net Ecosystem CO2 Exchange." J.Zhang, T.J.Griffis, and J.M.Baker. (Plant, Cell and Environment, 2006, 29: 483-496)
- "Ecophysiological Controls on the Carbon Balances of Three Southern Boreal Forests." T.J.Griffis, T.A.Black, K.Morgenstern, A.Barr, Z.Nesic, G.Drewitt, D.Gaumont-Guay, H.McCaughey. (Agricultural and Forest Meteorology, 2003, 117:53-71)
Honors and Awards
- Fellow of the American Meteorological Society, 2025
- The 2012 Editors’ Citation for Excellence in Refereeing for JGR-Atmospheres, 2013
- National Science Foundation, Career Award, 2006
- CFANS Distinguished Teaching Award, 2006
Professional Activities and Service
Society Memberships
- American Geophysical Union
- American Meteorological Society
Editorial
- Chief Editor, Agricultural and Forest Meteorology (2020-present)
- Editor, Agricultural and Forest Meteorology (2008-2020)
- Editorial Board, Atmosphere (2014-2016)
- Associate Editor, Journal of Geophysical Research Biogeosciences (2007-2011)
National Advisory Committees and Affiliations
- Fellow of the American Meteorological Society, 2025
- The 2012 Editors’ Citation for Excellence in Refereeing for JGR-Atmospheres, 2013
- National Science Foundation, Career Award, 2006
- CFANS Distinguished Teaching Award, 2006
- National Ecological Observatory Network (NEON), Fundamental Instrument Unit Technical Working Group, 2009-2012
- 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 - 2021
- Chair, American Meteorological Society - Board on Atmospheric Biogeosciences, January 2016 - 2020