
Géochimie isotopique
Cycles biogéochimiques
Paléoclimat
peter.douglas [at] mcgill.ca (peter[dot]douglas[at]mcgill[dot]ca)
Mon groupe de recherche utilise la géochimie isotopique et organique pour étudier le changement climatique et le cycle du carbone dans les environnements terrestres, d'eau douce et côtiers. Récemment, nos recherches se sont concentrées sur trois thèmes principaux : 1) Définir les signaux isotopiques des émissions de méthane de l'échelle locale à l'échelle planétaire ; 2) Comprendre le destin du carbone et de l'azote libérés par le dégel du pergélisol ; et 3) Reconstruire les enregistrements des changements environnementaux naturels et anthropiques de l'Holocène dans les paysages tropicaux et arctiques.
Allan, E., Douglas, P., de Vernal, A., Gélinas, Y., Mucci, A., 2023. Palmitic acid is not a proper salinity proxy in Baffin Bay and the Labrador Sea but reflects the variability in organic matter sources modulated by sea ice coverage. Geochemistry, Geophysics, Geosystems.
Birkett, B. A., Obrist-Farner, J., Rice, P. M., Parker, W. G., Douglas, P. M., Berke, M. A., Taylor, A. K., Curtis, J. H., Keenan, B., 2023. Preclassic environmental degradation of Lake Petén Itzá, Guatemala, by the early Maya of Nixtun-Ch’ich’. Communications Earth & Environment 4(1), 59.
Kuhn, M. A., Schmidt, M., Heffernan, L., Stührenberg, J., Knorr, K. H., Estop‐Aragonés, C., Broder, T., Gonzalez Moguel, R., Douglas, P.M.J., Olefeldt, D., 2023. High ebullitive, millennial‐aged greenhouse gas emissions from thermokarst expansion of peatland lakes in boreal western Canada. Limnology and Oceanography 68(2), 498-513.
Douglas, P.M., Stratigopoulos, E., Park, S., Keenan, B., 2022. Spatial differentiation of sediment organic matter isotopic composition and inferred sources in a temperate forest lake catchment. Chemical Geology 603, 120887.
Gonzalez Moguel, R., Vogel, F., Ars, S., Schaefer, H., Turnbull, J.C., Douglas, P.M., 2022. Using carbon-14 and carbon-13 measurements for source attribution of atmospheric methane in the Athabasca oil sands region. Atmospheric Chemistry and Physics 22(3), 2121-2133.
Imfeld, A., Ouellet, A., Douglas, P., Kos, G., Gélinas, Y., 2022. Molecular and stable isotope analysis (δ13C, δ2H) of sedimentary n-alkanes in the St. Lawrence Estuary and Gulf, Quebec, Canada: importance of even numbered n-alkanes in coastal systems. Organic Geochemistry 164, 104367.
Keenan, B., Imfeld, A., Gélinas, Y., Douglas, P.M., 2022. Understanding controls on stanols in lake sediments as proxies for palaeopopulations in Mesoamerica. Journal of Paleolimnology 67, 375-390.
Bourque, R.D., Douglas, P.M., Larsson, H.C., 2021. Changes in terrestrial ecosystem across the Cretaceous-Paleogene boundary in western Canada inferred from plant wax lipid distributions and isotopic measurements. Palaeogeography, Palaeoclimatology, Palaeoecology 562, 110081.
Gonzalez Moguel, R., Bass, A.M., Garnett, M.H., Pilote, M., Keenan, B., Matveev, A., Douglas, P.M., 2021. Radiocarbon Data Reveal Contrasting Sources for Carbon Fractions in Thermokarst Lakes and Rivers of Eastern Canada (Nunavik, Quebec). Journal of Geophysical Research: Biogeosciences 126(4), e2020JG005938.
Keenan, B., Imfeld, A., Johnston, K., Breckenridge, A., Gélinas, Y., Douglas, P.M., 2021. Molecular evidence for human population change associated with climate events in the Maya lowlands. Quaternary Science Reviews 258, 106904.
Prėskienis, V., Laurion, I., Bouchard, F., Douglas, P.M., Billett, M.F., Fortier, D., Xu, X., 2021. Seasonal patterns in greenhouse gas emissions from lakes and ponds in a High Arctic polygonal landscape. Limnology and Oceanography 66, S117–S141.
Douglas, P.M., Gonzalez Moguel, R., Walter Anthony, K.M., Wik, M., Crill, P.M., Dawson, K.S., Smith, D.A., Yanay, E., Lloyd, M.K., Stolper, D.A., Eiler, J.M., 2020. Clumped isotopes link older carbon substrates with slower rates of methanogenesis in northern lakes. Geophysical Research Letters 47(6), e2019GL086756.
Kang, M., Dong, Y., Liu, Y., Williams, J.P., Douglas, P., McKenzie, J.M., 2019. Potential increase in oil and gas well leakage due to earthquakes. Environmental Research Communications 1(12), 121004.
Douglas, P.M.J., Pagani, M., Eglinton, T.I., Brenner, M., Curtis, J.H., Breckenridge, A., Johnston, K., 2018. A long-term decrease in the persistence of soil carbon caused by ancient Maya land use. Nature Geoscience 11 (9), 645-649.
Shuai, Y., Douglas, P.M.J., Zhang, S., Stolper, D.A., Ellis, G.S., Lawson, M., Lewan, M.D., Formolo, M., Mi, J., He, K., Hu, G., Eiler, J.M., 2018. Equilibrium and non-equilibrium controls on the abundances of clumped isotopologues of methane during thermogenic formation in laboratory experiments: Implications for the chemistry of pyrolysis and the origins of natural gases. Geochimica et Cosmochimica Acta 223, 159-174.
Shuai, Y., Etiope, G., Zhang, S., Douglas, P.M.J., Huang, L., Eiler, J.M., 2018. Methane clumped isotopes in the Songliao Basin (China): New insights into abiotic vs. biotic hydrocarbon formation. Earth and Planetary Science Letters 482, 213-221.
Stolper, D.A., Lawson, M., Formolo, M.J., Davis, C.L., Douglas, P.M.J., Eiler, J.M., 2018. The utility of methane clumped isotopes to constrain the origins of methane in natural gas accumulations. Geological Society Special Publication 468 (1), 23-52.
Douglas, P.M.J., Stolper, D.A., Eiler, J.M., Sessions, A.L., Lawson, M., Shuai, Y., Bishop, A., Podlaha, O.G., Ferreira, A.A., Santos Neto, E.V., Niemann, M., Steen, A.S., Huang, L., Chimiak, L., Valentine, D.L., Fiebig, J., Luhmann, A.J., Seyfried, W.E., Jr., Etiope, G., Schoell, M., Inskeep, W.P., Moran, J.J. and Kitchen, N., 2017. Methane clumped isotopes: Progress and potential for a new isotopic tracer. Organic Geochemistry 113, 262-282.
Douglas, P.M.J., Stolper, D.A., Smith, D.A., Walter Anthony, K.M., Paull, C.K., Dallimore, S., Wik, M., Crill, P.M., Winterdahl, M., Eiler, J.M. and Sessions, A.L., 2016. Diverse origins of Arctic and Subarctic methane point source emissions identified with multiply-substituted isotopologues. Geochimica et Cosmochimica Acta 188, 163-188.
Douglas, P.M.J., Demarest, A.A., Brenner, M. and Canuto, M.A., 2016. Impacts of Climate Change on the Collapse of Lowland Maya Civilization. Annual Review of Earth and Planetary Sciences 44, 613-645.
Douglas, P.M.J., Brenner, M., Curtis, J.H., 2016. Methods and future directions for paleoclimatology in the Maya Lowlands. Global and Planetary Change 138, 3-24.
Stolper, D.A., Martini, A.M., Clog, M., Douglas, P.M., Shusta, S.S., Valentine, D.L., Sessions, A.L. and Eiler, J.M., 2015. Distinguishing and understanding thermogenic and biogenic sources of methane using multiply substituted isotopologues. Geochimica et Cosmochimica Acta 161, 219-247.
Coutros, P.R. and Douglas, P.M.J., 2015. Coring Lake Fati and Settlement Archaeology of the Middle Niger Lakes Region. African Archaeological Review 32(2), 249-266.
Douglas, P.M.J., Pagani, M., Canuto, M.A., Brenner, M., Hodell, D.A., Eglinton, T.I. and Curtis, J.H., 2015. Drought, agricultural adaptation, and sociopolitical collapse in the Maya Lowlands. Proceedings of the National Academy of Sciences of the United States of America 112(18), 5607-5612.
Douglas, P.M.J., Pagani, M., Eglinton, T.I., Brenner, M., Hodell, D.A., Curtis, J.H., Ma, K.F. and Breckenridge, A., 2014. Pre-aged plant waxes in tropical lake sediments and their influence on the chronology of molecular paleoclimate proxy records. Geochimica et Cosmochimica Acta 141, 346-364.
Douglas, P.M.J., Affek, H.P., Ivany, L.C., Houben, A.J.P., Sijp, W.P., Sluijs, A., Schouten, S., Pagani, M., 2014. Pronounced zonal heterogeneity in Eocene southern high-latitude sea surface temperatures. Proceedings of the National Academy of Sciences of the United States of America 111(18), 6582-6587.
Sijp, W.P., von der Heydt, A.S., Dijkstra, H.A., Flögel, S., Douglas, P.M.J., Bijl, P.K., 2014. The role of ocean gateways on cooling climate on long time scales. Global and Planetary Change 119, 1-22.
Douglas, P.M.J., Pagani, M., Brenner, M., Hodell, D.A., Curtis, J.H., 2012. Aridity and vegetation composition are important determinants of leaf-wax δD values in southeastern Mexico and Central America. Geochimica et Cosmochimica Acta 97, 24-45.
Keating-Bitonti, C.R., Ivany, L.C., Affek, H.P., Douglas, P., Samson, S.D., 2011. Warm, not super-hot, temperatures in the early Eocene subtropics. Geology 39(8), 771-774.
Department of Earth and Planetary Sciences, McGill
Codirection : Yves Gélinas
Sujet de recherche : Reconstitution des variations hydrologiques de la baie de Baffin et de la mer du Labrador à l'aide de la composition isotopique de l’hydrogène de la cire des feuilles.
Department of Earth and Planetary Sciences, McGill
Codirection : R. Léveillé, McGill
Sujet de recherche : Biosignatures in Arctic gossan deposits.
Department of Earth and Planetary Sciences, McGill
Codirection : John Stix
Sujet de recherche : Trees as passive sensors and archives of volcanic CO2 emissions.
Department of Earth and Planetary Sciences, McGill
Sujet de recherche : Nitrous oxide emissions from arctic and boreal areas of thawing permafrost.
Department of Earth and Planetary Sciences, McGill
Sujet de recherche : Understanding the processes controlling the release of radiocarbon depleted methane in permafrost hosted lakes
Institut des sciences de la mer de Rimouski, Université du Québec à Rimouski
Codirection : André Pellerin
Sujet de recherche : Production de méthane et de dioxyde de carbone dans les sédiments côtiers de l’Arctique Ouest en contexte de changements climatiques
Department of Earth and Planetary Sciences, McGill
Sujet de recherche : Processes controlling Holocene carbon burial in coastal Labrador Sea sediments.