Trevor Porter, Assistant Professor


Home Campus:
U o f T Mississauga

Carleton University (2012)

Other Degrees:
BSc, Carleton University (2006)

Contact Information:

Department of Geography, Geomatics and Environment
University of Toronto – Mississauga
William Davis Building, Room 3280
3359 Mississauga Road, Mississauga, ON, Canada L5L 1C6
office +1-905-828-5314 | fax +1-905-828-5273

Personal Website:

Research Interests:

  • Paleoenvironments
  • Climate change
  • Stable isotope geochemistry
  • Dendrochronology

Teaching This Academic Year:

  • GGR112H5S – Physical Geography
  • GGR304H5S – Dendrochronology
  • GGR379H5F – Field Methods in Physical Geography
  • GGR479H5S – Advanced Seminar in Paleoenvironmental Studies
  • GGR1218H5S – Open-Source Methods in Physical Geography

Call For Students:

I am recruiting PhD and MSc students to carry out research on topics related to paleoenvironmental change. Past and current students in my group (UTM Paleolab) have specialised in reconstructing past changes from natural proxies preserved in tree-rings, biomarkers, ice-rich permafrost, and geochemical signatures. Most of this work is based in areas of N.W. Canada and Alaska. Please explore my website to learn more about recent projects and publications ( If this type of work interests you, please contact me to discuss potential projects and include a brief statement of your research interests and CV.

Selected Publications:

  • Eccles, K, Majeed, H, Porter, TJ, Lehnherr, I (accepted): A continental and marine influenced tree rings mercury record in Old Crow, Yukon, Canada. ACS Earth and Space Chemistry.
  • Munoz, S, Porter, T, Bakkelund, A, Nausbaumer, J, Dee, S, Giosan, L, & Tierney, J (2020): Lipid biomarker record documents hydroclimatic variability of the Mississippi River basin during the Common Era. Geophysical Research Letters 47 (12), doi: 10.1029/2020GL087237.[LINK]
  • Holland, KM, Porter, TJ, Froese, DG, Kokelj, SV, Buchanan, C (2020). Ice-wedge evidence of Holocene winter warming in the Canadian Arctic. Geophysical Research Letters 47(12), doi: 10.1029/2020GL087942.[LINK]
  • Bandara, Froese, D, S, Porter, TJ, Calmels, F, (accepted). Holocene pore-ice δ18O and δ2H records from drained thermokarst lake basins in the Old Crow Flats, Yukon, Canada. Permafrost and Periglacial Processes.
  • Otiniano, G, Porter, TJ, Benowitz, J, Bindeman, I, Froese, D, Jensen, B, Davies, L, Phillips, M (accepted): Late Cenozoic climate change in terrestrial southern Alaska. Paleoceanography and Paleoclimatology.[LINK]
  • Porter, TJ, Opel, T (2020). Relict permafrost as an archive for paleo-meteoric waters and climate reconstruction. 2020 International Permafrost Association Transactions Special Issue, Permafrost and Periglacial Processes. [LINK]
  • Churakova (Sidorova), OV, Porter, TJ, Kirdyanov, AV, Myglan, SV, Fonti, MV, & Vaganov, E.A. (accepted). Chapter 21. Stable isotopes in tree rings as indicators of climatic and eco-physiological changes across boreal forest. Editors: Siegwolf, R, Brooks, JR, Roden, & J, Saurer, M. In: Stable Isotopes in Tree Rings: Inferring Physiological, Climatic and Environmental Responses. Springer: Tree Physiology.
  • Ghotra, A, Lehnherr, I, Porter, TJ, & Pisaric, M (2020): Tree-Ring Inferred Atmospheric Mercury Concentrations in the Mackenzie Delta (NWT, Canada) Peaked in the 1970s but Are Increasing Once More. ACS Earth and Space Chemistry 4: 457-466.[LINK]
  • Lange, J, Carrer, M, Pisaric, MFJ, Porter, TJ, Seo, J-W; Trouillier, M, Wilmking, M, (2019). Moisture-driven shift in the climate sensitivity of white spruce xylem anatomical traits is coupled to large-scale oscillation patterns across the northern treeline in Alaska and NW Canada. Global Change Biology 25:1842-1856. [LINK]
  • Porter, TJ, Schoenemann, SW, Davies, LJ, Steig, EJ, Bandara, S, Froese, DG (2019). Recent summer warming in northwestern Canada exceeds the Holocene thermal maximum. Nature Communications, doi://10.1038/s41467-019-09622-y. [LINK]
  • Bakkelund, A, Porter, TJ, Froese, DG, Feakins, SJ (2018). Net fractionation of hydrogen isotopes in n-alkanoic acids from soils in the northern boreal forest. Organic Geochemistry, doi://10.1016/j.orggeochem.2018.08.005. [LINK]
  • Clackett, S, Porter, TJ, Lehnherr, I (2018). A 400-year record of atmospheric mercury from tree-rings in northwestern Canada. Environmental Science & Technology, doi://10.1021/acs.est.8b01824. [LINK]
  • PAGES 2k Consortium (2017): A global multiproxy database for temperature reconstructions of the Common Era. Scientific Data, SDATA-16-00169. [LINK]
  • Porter, TJ, Froese, DG, Feakins, SJ, Bindeman, I, Mahony, ME, Pautler, BG, Reichart, G-J, Sanborn, PT, Simpson, MJ, Weijers, JWH (2016): Multiple water isotope proxy reconstruction of extremely low last glacial temperatures in Eastern Beringia (Western Arctic). Quaternary Science Reviews, 137: 113-125. [LINK]
  • Dick, M, Porter, TJ, Pisaric, MFJ, Wertheimer, È, deMontigny, P, Perreault, JT, Robillard, K-L (2014): Development of a multicentennial eastern white pine tree ring chronology from salvaged river logs and its utility for dendroarcheological dating in eastern Ontario, Canada. Dendrochronologia, 32: 120-126. [LINK]
  • Porter, TJ, Pisaric, MFJ, Field, R, Kokelj, SV, Edwards, TWD, deMontigny, P, Healy, R, and LeGrande, A (2014): Spring-summer temperatures since AD 1780 reconstructed from stable oxygen isotope ratios in white spruce tree-rings from the Mackenzie Delta, northwestern Canada. Climate Dynamics, 42: 771-785. [LINK]
  • Porter, TJ, Pisaric, MFJ, Kokelj, SV, deMontigny, P (2013): A ring-width-based reconstruction of June-July minimum temperatures since AD 1245 from white spruce stands in the Mackenzie Delta region, northwestern Canada. Quaternary Research, 80: 167-179. [LINK]
  • Porter, TJ, Middlestead, P (2012): On estimating the precision of stable isotope ratios in processed tree-rings. Dendrochronologia, 30: 239-242. [LINK]
  • Porter, TJ, Pisaric, MFJ (2011): Temperature-growth divergence in white spruce forests of Old Crow Flats, Yukon Territory, and adjacent regions of northwestern North America. Global Change Biology, 11: 3418-3430. [LINK]
  • Wolfe, BB, Humphries, MM, Pisaric, MFJ, Balasubramaniam, AM, Burn, CR, Chan, L, Cooley, D, Froese, DG, Graupe, S, Hall, RI, Lantz, T, Porter, TJ, Roy-Leveillee, P, Turner, KW, Wesche, SD, Williams, M (2011): Environmental change and traditional use of the Old Crow Flats in northern Canada: An IPY opportunity to meet the challenges of the new northern research paradigm. Arctic, 64: 127-135. [LINK]
  • Porter, TJ, Pisaric, MFJ, Kokelj, SV, and Edwards, TWD (2009): Climate signals in δ13C and δ18O of tree-rings from white spruce in the Mackenzie Delta region, northern Canada. Arctic, Antarctic, and Alpine Research, 41: 497-505. [LINK]

Research Clusters:
Paleoclimate and Biogeography