Profile

Oliver Sonnentag
Regular member
Department of geography
University of Montreal
oliver.sonnentag@umontreal.ca

Supervising:

Kathryn Bennett (Ph.D. student)

Bo Qu (Ph.D. student)

Carolina Voigt (Postdoctoral fellow)

Co-supervising:

Azza Gorrab ep El Khedhri (Postdoctoral fellow)

Alex Mavrovic (Ph.D. student)

Camille Roy (Master student)

Recent Theses and Dissertations

Mariam El-Amine (Master - 2020)
Environmental controls on interannual variability of photosynthetic recovery and termination in the North American boreal forest

Scientific Communications

Mavrovic, A., Sonnentag, O., Lemmetyinen, J., Baltzer, J.L., Kinnard, C., Roy, A.R., 2023. Reviews and syntheses: Recent advances in microwave remote sensing in support of terrestrial carbon cycle science in Arctic–boreal regions. Biogeosciences, 20(14): 2941-2970. DOI: 10.5194/bg-20-2941-2023.

El-Amine, M., Roy, A.R., Koebsch, F., Baltzer, J.L., Barr, A., Black, A., Ikawa, H., Iwata, H., Kobayashi, H., Ueyama, M., Sonnentag, O., 2022. What explains the year-to-year variation in growing season timing of boreal black spruce forests? Agricultural and Forest Meteorology, 324, 109113. DOI: 10.1016/j.agrformet.2022.109113.

Chang, K.-Y., Riley, W.J., Knox, S.H., Jackson, R.B., McNicol, G., Poulter, B., Aurela, M., Baldocchi, D., Bansal, S., Bohrer, G., Campbell, D.I., Cescatti, A., Chu, H., Delwiche, K.B., Desai, A.R., Euskirchen, E., Friborg, T., Göckede, M., Helbig, M.J., Hemes, K.S., Hirano, T., Iwata, H., Kang, M., Keenan, T., Krauss, K.W., Lohila, A., Mammarella, I., Mitra, B., Miyata, A.H., Nilsson, M.B., Noormets, A., Oechel, W.C., Papale, D., Peichl, M., Reba, M.L., Rinne, J., Runkle, B.R.K., Ryu, Y., Sachs, T., Schäfer, K.V.R., Schmid, H.P., Shurpali, N., Sonnentag, O., Tang, A.C.I., Torn, M.S., Trotta, C., Tuittila, E.-S., Ueyama, M., Vargas, R., Vesala, T., Windham-Myers, L., Zhang, Z., Zona, D., 2021. Substantial hysteresis in emergent temperature sensitivity of global wetland CH4 emissions. Nature Communications, 12, 2266. DOI: 10.1038/s41467-021-22452-1.

Chu, H., Luo, X., Ouyang, Z., Chan, W.S., Dengel, S., Biraud, S.C., Torn, M.S., Metzger, S., Kumar, J., Arkebauer, T.J., Baldocchi, D., Bernacchi, C., Billesbach, D.P., Black, A., Blanken, P.D., Bohrer, G., Bracho, R., Brown, S., Brunsell, N.A., Chen, J., Chen, X., Clark, K., Desai, A.R., Duman, T.B., Durden, D., Fares, S., Forbrich, I., Gamon, J., Gough, C.M., Griffis, T., Helbig, M.J., Hollinger, D., Humphreys, E., Ikawa, H., Iwata, H., Kalhori, A., Ju, Y., Knowles, J.F., Knox, S.H., Kobayashi, H., Kolb, T., Law, B., Lee, X., Litvak, M., Liu, H., Munger, J.W., Noormets, A., Novick, K., Oberbauer, S.F., Oechel, W.C., Oikawa, P.Y., Papuga, S.A., Pendall, E., Prajapati, P., Prueger, J., Quinton, W.L., Richardson, A.D., Russell, E.S., Scott, R.L., Starr, G., Staebler, R., Stoy, P.C., Stuart-Haëntjens, E., Sonnentag, O., Sullivan, R.C., Suyker, A., Ueyama, M., Vargas, R., Wood, J.D., Zona, D., 2021. Representativeness of Eddy-Covariance flux footprints for areas surrounding AmeriFlux sites. Agricultural and Forest Meteorology, 301-302, 108350. DOI: 10.1016/j.agrformet.2021.108350.

Connon, R., Chasmer, L., Haughton, E., Helbig, M.J., Hopkinson, C., Sonnentag, O., Quinton, W.L., 2021. The implications of permafrost thaw and land cover change on snow water equivalent accumulation, melt and runoff in discontinuous permafrost peatlands. Hydrological Processes, 35(9), e14363. DOI: 10.1002/hyp.14363.

Delwiche, K.B., Knox, S.H., Malhotra, A., Fluet-Chouinard, E., McNicol, G., Feron, S., Ouyang, Z., Papale, D., Trotta, C., Canfora, E., Cheah, Y.-W., Christianson, D., Alberto, M.C.R., Alekseychik, P., Aurela, M., Baldocchi, D., Bansal, S., Billesbach, D.P., Bohrer, G., Bracho, R., Buchmann, N., Campbell, D.I., Celis, G., Chen, J., Chen, W., Chu, H., Dalmagro, H.J., Dengel, S., Desai, A.R., Detto, M., Dolman, H., Eichelmann, E., Euskirchen, E., Famulari, D., Fuchs, K., Göckede, M., Gogo, S., Gondwe, M.J., Goodrich, J.P., Gottschalk, P., Graham, S.L., Heimann, M., Helbig, M.J., Helfter, C., Hemes, K.S., Hirano, T., Hollinger, D., Hörtnagl, L., Iwata, H., Jacotot, A., Jurasinki, G., Kang, M., Kasak, K., King, J., Klatt, J., Koebsch, F., Krauss, K.W., Lai, D.Y.F., Lohila, A., Mammarella, I., Marchesini, L.B., Manca, G., Matthes, J.H., Maximov, T., Merbold, L., Mitra, B., Morin, T.H., Nemitz, E., Nilsson, M.B., Niu, S.B., Oechel, W.C., Oikawa, P.Y., Ono, K., Peichl, M., Peltol, O., Reba, M.L., Richardson, A.D., Riley, W., Runkle, B.R.K., Ryu, Y., Sachs, T., Sakabe, A., Rey-Sanchez, A.C., Schuur, E.A., Schäfer, K.V.R., Sonnentag, O., Sparks, J.P., Stuart-Haëntjens, E., Sturtevant, C., Sullivan, R.C., Szutu, D.J., Thom, J.E., Torn, M.S., Tuittila, E.-S., Turner, J., Ueyama, M., Valach, A.C, Vargas, R., Varlagin, A., Vazquez-Lule, A., Verfaillie, J.G., Vesala, T., Vourlitis, G.L, Ward, E.J., Wille, C., Wohlfarht, G., Wong, G.X, Zhang, Z., Zona, D., Windham-Myers, L., Poulter, B., Jackson, R.B., 2021. FLUXNET-CH4: a global, multi-ecosystem dataset and analysis of methane seasonality from freshwater wetlands. Earth System Science Data, 13(7): 3607–3689. DOI: 10.5194/essd-13-3607-2021.

Dutch, V.R., Rutter, N.D.L., Wake, L., Sandells, M., Derksen, C., Branden, W., Hould Gosselin, G., Sonnentag, O., Essery, R., Kelly, R., Marsh, P., King, J., 2021. Impact of measured and simulated tundra snowpack properties on heat transfer. The Cryosphere. DOI: 10.5194/tc-2021-313.

Holtzman, N.M., Anderegg, L.D.L., Kraatz, S., Mavrovic, A., Sonnentag, O., Pappas, C., Cosh, M.H., Langlois, A., Lakhankar, T., Tesser, D., Steiner, N., Colliander, A., Roy, A.R., Konings, A.G., 2021. L-band vegetation optical depth as an indicator of plant water potential in a temperate deciduous forest stand. Biogeosciences, 18(2): 739–753. DOI: 10.5194/bg-18-739-2021.

Irvin, J., Zhou, S., McNicol, G., Lu, F., Liu, V., Fluet-Chouinard, E., Ouyang, Z., Knox, S.H., Lucas-Moffat, A., Trotta, C., Papale, D., Vitale, D., Mammarella, I., Alekseychik, P., Aurela, M., Avati, A., Baldocchi, D., Bansal, S., Bohrer, G., Campbell, D.I., Chen, J., Chu, H., Dalmagro, H.J., Delwiche, K.B., Desai, A.R., Euskirchen, E., Feron, S., Göckede, M., Heimann, M., Helbig, M.J., Helfter, C., Hemes, K.S., Hirano, T., Iwata, H., Jurasinki, G., Kalhori, A., Kondrich, A., Lai, D.Y.F., Lohila, A., Malhotra, A., Merbold, L., Mitra, B., Ng, A., Nilsson, M.B., Noormets, A., Peichl, M., Rey-Sanchez, A.C., Richardson, A.D., Runkle, B.R.K., Schäfer, K.V.R., Sonnentag, O., Stuart-Haëntjens, E., Sturtevant, C., Ueyama, M., Valach, A.C, Vargas, R., Vourlitis, G.L, Ward, E.J., Wong, G.X, Zona, D., Alberto, M.C.R., Billesbach, D.P., Celis, G., Dolman, H., Friborg, T., Fuchs, K., Gogo, S., Gondwe, M.J., Goodrich, J.P., Gottschalk, P., Hörtnagl, L., Jacotot, A., Koebsch, F., Kasak, K., Maier, R., Morin, T.H., Nemitz, E., Oechel, W.C., Oikawa, P.Y., Ono, K., Sachs, T., Sakabe, A., Schuur, E.A., Shortt, R., Sullivan, R.C., Szutu, D.J., Tuittila, E.-S., Varlagin, A., Verfaillie, J.G., Wille, C., Windham-Myers, L., Poulter, B., Jackson, R.B., 2021. Gap-filling eddy covariance methane fluxes: Comparison of machine learning model predictions and uncertainties at FLUXNET-CH4 wetlands. Agricultural and Forest Meteorology, 308-309, 108528. DOI: 10.1016/j.agrformet.2021.108528.

Knox, S.H., Bansal, S., McNicol, G., Schäfer, K.V.R., Sturtevant, C., Ueyama, M., Valach, A.C, Baldocchi, D., Delwiche, K.B., Desai, A.R., Euskirchen, E., Liu, V., Lohila, A., Malhotra, A., Melling, L., Riley, W., Runkle, B.R.K., Turner, J., Vargas, R., Zhu, Q., Alto, T., Fluet-Chouinard, E., Göckede, M., Melton, J.R., Sonnentag, O., Vesala, T.L, Ward, E.J., Zhang, Z., Feron, S., Ouyang, Z., Alekseychik, P., Aurela, M., Bohrer, G., Campbell, D.I., Chen, J., Chu, H., Dalmagro, H.J., Goodrich, J.P., Gottschalk, P., Hirano, T., Iwata, H., Jurasinki, G., Kang, M., Koebsch, F., Mammarella, I., Nilsson, M.B., Ono, K., Peichl, M., Peltola, O., Ryu, Y., Sachs, T., Sakabe, A., Sparks, J.P., Tuittila, E.-S., Vourlitis, G.L., Wong, G.X, Windham-Myers, L., Poulter, B., Jackson, R.B., 2021. Identifying dominant environmental predictors of freshwater wetland methane fluxes across diurnal to seasonal time scales. Global Change Biology, 27(15): 3582-3604. DOI: 10.1111/gcb.15661.

Kropp, H., Loranty, M.M., Natali, S.M., Kholodov, A.L., Rocha, A.V., Myers-Smith, I., Abbott, B.W., Abermann, J., Blanc-Betes, E., Blok, D., Blume-Werry, G., Boike, J., Breen, A.L., Cahoon, S.M.P., Christiansen, C.T., Douglas, T.A., Epstein, H.E., Frost, G.V., Göckede, M., Høye, T.T., Mamet, S.D., O'Donnell, J.A., Olefeldt, D., Phoenix, G.K., Salmon, V.G., Sannel, A.B.K., Smith, S.L., Sonnentag, O., Smith Vaughn, L., Williams, M., Eberling, B., Gough, L., Hjort, J., Lafleur, P.M., Euskirchen, E.S., Heijmans, M.M.P.D., Humphreys, E.R., Iwata, H., Jones, B.M., Jorgenson, M.T., Grünberg, I., Kim, Y., Laundre, J., Mauritz, M., Michelsen, A., Schaepman-Strub, G., Tape, K.D., Ueyama, M., Lee, B.-Y., Langley, K., Lund, M., 2021. Shallow soils are warmer under trees and tall shrubs across arctic and boreal ecosystems. Environmental Research Letters, 16(1), 015001. DOI: 10.1088/1748-9326/abc994.

Loisel , J., Gallego-Sala, A.V., Amesbury, M.J., Magnan, G., Anshari, G., Beilman, D.W., Benavides, J.C., Blewett , J., Camill, P., Charman, D.J., Chawchai, S., Hedgpeth, A., Kleinen, T., Korhola, A., Large, D., Mansilla, C.A., Müller, J., van Bellen, S., West, J.B., Yu, Z., Bubier, J.L., Garneau, M., Moore, T., Sannel, A.B.K., Page, S., Väliranta, M., Bechtold, M., Brovkin, V., Cole, L.E.S., Chanton, J., Christensen, T.R., Davies, M.A., De Vleeschouwer, F., Finkelstein, S.A., Frolking, S., Gałka, M., Gandois, L., Girkin, N., Harris, L.I., Heinemeyer, A., Hoyt, A.M., Jones, M.C., Joos, F., Juutinen, S., Kaiser, K., Lacourse, T., Lamentowicz, M., Larmola, T., Leifeld, J., Lohila, A., Milner, A.M., Minkkinen, K., Moss, P., Naafs, B.D.A., Nichols, J., O’Donnell, J., Payne, R., Philben, M., Piilo, S., Quillet, A., Ratnayake, A.S., Roland, T.P., Sjögersten, S., Sonnentag, O., Swindles, G.T., Swinnen, W., Talbot, J., Treat, C., Valach, A.C., Wu, J., 2021. Author Correction: Expert assessment of future vulnerability of the global peatland carbon sink. Nature Climate Change, 11: 362. DOI: 10.1038/s41558-021-00991-1.

Loisel , J., Gallego-Sala, A.V., Amesbury, M.J., Magnan, G., Anshari, G., Beilman, D.W., Benavides, J.C., Blewett , J., Camill, P., Charman, D.J., Chawchai, S., Hedgpeth, A., Kleinen, T., Korhola, A., Large, D., Mansilla, C.A., Müller, J., van Bellen, S., West, J.B., Yu, Z., Bubier, J.L., Garneau, M., Moore, T., Sannel, A.B.K., Page, S., Väliranta, M., Bechtold, M., Brovkin, V., Cole, L.E.S., Chanton, J., Christensen, T.R., Davies, M.A., De Vleeschouwer, F., Finkelstein, S.A., Frolking, S., Gałka, M., Gandois, L., Girkin, N., Harris, L.I., Heinemeyer, A., Hoyt, A.M., Jones, M.C., Joos, F., Juutinen, S., Kaiser, K., Lacourse, T., Lamentowicz, M., Larmola, T., Leifeld, J., Lohila, A., Milner, A.M., Minkkinen, K., Moss, P., Naafs, B.D.A., Nichols, J., O’Donnell, J., Payne, R., Philben, M., Piilo, S., Quillet, A., Ratnayake, A.S., Roland, T.P., Sjögersten, S., Sonnentag, O., Swindles, G.T., Swinnen, W., Talbot, J., Treat, C., Valach, A.C., Wu, J., 2021. Expert assessment of future vulnerability of the global peatland carbon sink. Nature Climate Change, 11: 70-77. DOI: 10.1038/s41558-020-00944-0.

Olefeldt, D., Hovemyr, M., Kuhn, M.A., Bastviken, D., Bohn, T.J., Connolly, J., Crill, P., Euskirchen, E., Finkelstein, S.A., Genet, H., Grosse, G., Harris, L.I., Heffernan, L., Christensen, T.R., Helbig, M.J., Hugelius, G., Hutchins, R., Juutinen, S., Lara, M.J., Malhotra, A., Manies, K., McGuire, A.D., Natali, S.M., O'Donnell, J.A., Parmentier, F.-J.W., Räsänen, A., Schädel, C., Sonnentag, O., Strack, M., Tank, S.E., Treat, C., Varner, R.K., Virtanen, T., Warren, R.K., Watts, J.D., 2021. The boreal-arctic wetland and lake dataset (BAWLD). Earth System Science Data, 13: 5127–5149. DOI: 10.5194/essd-13-5127-2021.

Pierrat, Z., Nehemy, M.F., Roy, A.R., Magney, T., Parazoo, N.C., Laroque, C., Pappas, C., Sonnentag, O., Grossmann, K., Bowling, D.R., Seibt, U., Ramirez, A., Johnson, B., Helgason, W., Barr, A., Stutz, J., 2021. Tower-based remote sensing reveals mechanisms behind a two-phased spring transition in a mixed-species boreal forest. Journal of Geophysical Research - Biogeosciences, 126(5), e2020JG006191. DOI: 10.1029/2020JG006191.

Virkkala, A.-M., Aalto, J., Rogers, B.M., Tagesson, T., Treat, C.C., Natali, S.M., Watts, J.D., Potter, S., Lehtonen, A., Mauritz, M.J., Schuur, E.A.G., Kochendorfer, J., Zona, D., Oechel, W., Kobayashi, H., Humphreys, E., Göckede, M., Iwata, H., Lafleur, P.M., Euskirch, E.S., Bokhorst, S., Marushchak, M., Martikainen, P.J., Elberling, B., Voigt, C., Biasi, C., Sonnentag, O., Parmentier, F.-J.W., Ueyama, M., Celis, G., St.Louis, V.L., Emmerton, C.A., Humphreys, E., Peichl, M., Chi, J., Järveoja, J., Nilsson, M.B., Oberbauer, S.F., Torn, M.S., Park, S.-J., Dolman, H., Mammarella, I., Chae, N., Poyatos, R., López-Blanco, E., Christensen, T.R., Known, M.J., Sachs, T., Holl, D., Luoto, M., 2021. Statistical upscaling of ecosystem CO2 fluxes across the terrestrial tundra and boreal domain: Regional patterns and uncertainties. Global Change Biology, 27(17): 4040-4059. DOI: 10.1111/gcb.15659.

Watts, J.D., Natali, S.M., Minions, C., Risk, D., Arndt, K.A., Zona, D., Euskirchen, E., Rocha, A.V., Sonnentag, O., Helbig, M.J., Kalhori, A.A.M., Oechel, W.C., Ikawa, H., Ueyama, M., Suzuki, R., Kobayashi, H., Celis, G., Schuur, E.A.G., Humphreys, E., Kim, Y., Lee, B.-Y., Goetz, S., Madani, N., Schiferl, L.D., Commane, R., Kimball, J.S., Liu, Z., Torn, M.S., Potter, S., Wang, J.A., Jorgenson, M.T., Xiao, J., Li, X., Edgar, C., 2021. Soil respiration strongly offsets carbon uptake in Alaska and Northwest Canada. Environmental Research Letters, 16(8), 084051. DOI: 10.1088/1748-9326/ac1222.

Wu, C., Wang, J., Ciais, P., Peñuelas, J., Zhang, X., Sonnentag, O., Tian, F., Wang, X., Wang, H., Liu, R., Fu, Y.H., Ge, Q., 2021. Widespread decline in winds delayed autumn foliar senescence over high latitudes. Proceedings of the National Academy of Sciences of the United States of America (PNAS), 118(16), e2015821118. DOI: 10.1073/pnas.2015821118.

Baltzer, J.L., Sonnentag, O., 2020. No beating around the bush: the impact of projected high‐latitude vegetation transitions on soil and ecosystem respiration. New Phytologist, 227(6 - Special Issue: Featured papers on ‘Advances on genomics, biology, ecology and evolution of Brachypodium’): 1591-1593. DOI: 10.1111/nph.16704.

Helbig, M.J., Waddington, M., Alekseychik, P., Amiro, B., Aurela, M., Barr, A.G., Black, T.A., Blanken, P.D., Cary, S.K., Chen, J., Chi, J., Desai, A.R., Dunn, A., Euskirchen, E.S., Flanagan, L.B., Forbrich, I., Friborg, T., Grelle, A., Harder, S., Heliasz, M., Humphreys, E.R., Ikawa, H., Isabelle, P.-E., Iwata, H., Jassal, R., Korkiakoski, M., Kurbatova, J., Kutzbach, L., Lindroth, A., Ottosson Löfvenius, M., Lohila, A., Mammarella, I., Marsh, P., Maximov, T., Melton, J.R., Moore, P.A., Nadeau, D., Nicholls, E.M., Nilsson, M.B., Ohta, T., Peichl, M., Petrone, R.M., Petrov, R., Prokushkin, A., Quinton, W.L., Reed, D.E., Roulet, N.T., Runkle, B.R.K., Sonnentag, O., Strachan, I.B., Taillardat, P., Tuittila, E.-S., Tuovinen, J.-P., Turner, J., Ueyama, M., Varlagin, A., Wilmking, M., Wofsy, S.C., Zyrianov, V., 2020. Increasing contribution of peatlands to boreal evapotranspiration in a warming climate. Nature Climate Change, 10: 555-560. DOI: 10.1038/s41558-020-0763-7.

Helbig, M.J., Waddington, M., Alekseychik, P., Amiro, B., Aurela, M., Barr, A.G., Black, T.A., Cary, S.K., Chen, J., Chi, J., Desai, A.R., Dunn, A., Euskirchen, E.S., Flanagan, L.B., Friborg, T., Garneau, M., Grelle, A., Harder, S., Heliasz, M., Humphreys, E.R., Ikawa, H., Isabelle, P.-E., Jassal, R., Korkiakoski, M., Kurbatova, J., Kutzbach, L., Lapshina, E., Lindroth, A., Ottosson Löfvenius, M., Lohila, A., Mammarella, I., Marsh, P., Moore, P.A., Maximov, T., Nadeau, D., Nicholls, E.M., Nilsson, M.B., Ohta, T., Peichl, M., Petrone, R.M., Prokushkin, A., Quinton, W.L., Roulet, N.T., Runkle, B.R.K., Sonnentag, O., Strachan, I.B., Taillardat, P., Tuittila, E.-S., Tuovinen, J.-P., Turner, J., Ueyama, M., Varlagin, A., Vesala, T., Wilmking, M., Zyrianov, V., Schulze, C., 2020. The biophysical climate mitigation potential of boreal peatlands during the growing season. Environmental Research Letters, 15, 104004. DOI: 10.1088/1748-9326/abab34.

Koebsch, F., Sonnentag, O., Järveoja, J., Peltoniemi, M., Alekseychik, P., Aurela, M., Arslan, A., Dinsmore, K., Gianelle, D., Helfter, C., Jackowicz‐Korczynski, M., Korrensalo, A., Leith, F.F., Linkosalmi, M., Lohila, A., Lund, M.I., Maddison, M., Mammarella, I., Mander, Ü., Minkkinen, K., Pickard, A., Pullens, J.W.M., Tuittila, E., Nilsson, M.B., Peichl, M., 2020. Refining the role of phenology in regulating gross ecosystem productivity across European peatlands. Global Change Biology, 26(2): 876-887. DOI: 10.1111/gcb.14905.

Liu, Y., Wu, C., Sonnentag, O., Desai, A.R., Wang, J., 2020. Using the red chromatic coordinate to characterize the phenology of forest canopy photosynthesis. Agricultural and Forest Meteorology, 285-286, 107910. DOI: 10.1016/j.agrformet.2020.107910.

Liu, Z., Kimball, J.S., Parazoo, N.C., Ballantyne, A.P., Wang, W.J., Madani, N., Pan, C.G., Watts, J.D., Reichle, R.H., Sonnentag, O., Marsh, P.M., Hurkuck, M., Helbig, M.J., Quinton, W.L., Zona, D., Ueyama, M., Kobayashi, H., Euskirchen, E.S., 2020. Increased high‐latitude photosynthetic carbon gain offset by respiration carbon loss during an anomalous warm winter to spring transition. Global Change Biology, 26(2): 682-696. DOI: 10.1111/gcb.14863.

Pappas, C., Maillet, J., Rabowski, S., Baltzer, J.L., Barr, A.G., Black, T.A., Fatichi, S., Laroque, C.P., Matheny, A.M., Roy, A.R., Sonnentag, O., Zha, T., 2020. Aboveground tree growth is a minor and decoupled fraction of boreal forest carbon input. Agricultural and Forest Meteorology, 290, 108030. DOI: 10.1016/j.agrformet.2020.108030.

Roy, A.R., Toose, P., Mavrovic, A., Pappas, C., Royer, A., Derksen, C., Berg, A., Rowlandson, T., El-Amine, M., Barr, A., Black, A., Langlois, A., Sonnentag, O., 2020. L-Band response to freeze/thaw in a boreal forest stand from ground- and tower-based radiometer observations. Remote Sensing of Environment, 273, 111542. DOI: 10.1016/j.rse.2019.111542.

Sonnentag, O., 2020. Changing land surface-atmosphere interactions across the arctic-boreal region (of northwestern Canada). Lund University; Centre for Environmental and Climate Science (CEC). Lund.

Sonnentag, O., 2020. The influence of permafrost thaw induced land cover changes on land surface-atmosphere interactions. Concordia University; Department of Geography, Planning, Environment. Montréal, Québec.

Stralberg, D., Arseneault, D., Baltzer, J.L., Bayne, E.M., Boulanger, Y., Brown, C.D., Cooke, H.A., Devito, K., Edwards, J., Estevo, C.A., Fleynn, N., Frelich, L.E., Hogg, E.H., Johnston, M., Logan, T., Matsuoka, S.M., Moore, P., Morell, L.T., Morissette, J.L., Nelson, E.A., Nenzén, H., Nielsen, S.E., Parisien, M.-A., Pedlar, J.H., Price, D.T., Schmiegelow, F.K.A., Slattery, S.M., Sonnentag, O., Thompson, D.K., Whitman, E., 2020. Climate-change refugia in boreal North America: what, where, and for how long? Frontiers in Ecology and the Environment, 15(5 - Special Issue: Climate‐Change Refugia): 261-270. DOI: 10.1002/fee.2188.

Voigt, C., Marushchak, M.E., Abbott, B.W., Biasi, C., Elberling, B., Siciliano, S.D., Sonnentag, O., Stewart, K.J., Yang, Y., Martikainen, P.J., 2020. Nitrous oxide emissions from permafrost-affected soils. Nature Reviews Earth & Environment, 1: 420-434. DOI: 10.1038/s43017-020-0063-9.

Voigt, C., van Delden, L., Marushchak, M.E., Biasi, C., Abbott, B.W., Elberling, B., Siciliano, S.D., Sonnentag, O., Stewart, K.J., Yang, Y., Martikainen, P.J., 2020. Nitrous oxide fluxes from permafrost regions. DOI: 10.1594/PANGAEA.919217.

Wang, J.A., Sulla‐Menashe, D., Woodcock, C.E., Sonnentag, O., Keeling, R.F., Friedl, M.A., 2020. Extensive land cover change across arctic–boreal Northwestern North America from disturbance and climate forcing. Global Change Biology, 26(2): 807-822. DOI: 10.1111/gcb.14804.

Eitel, J.U.H., Maguire, A.J., Boelman, N., Vierling, L.A., Griffin, K.L., Jensen, J., Magney, T.S., Mahoney, P.J., Meddens, A.J.H., Silva, C., Griffith, P., Sonnentag, O., 2019. Proximal remote sensing of tree physiology at northern treeline: Do late-season changes in the photochemical reflectance index (PRI) respond to climate or photoperiod? Remote Sensing of Environment, 221: 340-350. DOI: 10.1016/j.rse.2018.11.022.

Knox, S.H., Jackson, R.B., Poulter, B., McNicol, G., Fluet-Chouinard, E., Zhang, Z., Hugelius, G., Bousquet, P., Canadell, J.G., Saunois, M., Papale, D., Chu, H., Keenan, T.F., Baldocchi, D., Torn, M.S., Mammarella, I., Trotta, C., Aurela, M., Bohrer, G., Campbell, D.I., Cescatti, A., Chamberlain, S., Chen, J., Chen, W., Dengel, S., Desai, A.R., Euskirchen, E., Friborg, T., Gasbarra, D., Goded, I., Göckede, M., Heimann, M., Helbig, M.J., Hirano, T., Hollinger, D.Y., Iwata, H., Kang, M., Klatt, J., Krauss, K.W., Kutzbach, L., Lohila, A., Mitra, B., Morin, T.H., Nilsson, M.B., Niu, S., Noormets, A., Oechel, W.C., Peichl, M., Peltola, O., Reba, M.L., Richardson, A.D., Runkle, B.R.K., Ryu, Y., Sachs, T., Schäfer, K.V.R., Schmid, H., Shurpali, N., Sonnentag, O., Tang, A.C.I., Ueyama, M., Vargas, R., Vesala, T., Ward, E.J., Windham-Myers, L., Wohlfahrt, G., Zona, D., 2019. FLUXNET-CH4 synthesis activity: objectives, observations, and future directions. Bulletin of the American Meteorological Society, 100: 2607-2632. DOI: 10.1175/BAMS-D-18-0268.1.

Natali, S.M., Watts, J.D., Rogers, B.M., Potter, S., Ludwig, S.M., Selbmann, A.-K., Sullivan, P.F., Abbott, B.W., Arndt, K.A., Birch, L., Björkman, M.P., Bloom, A.A., Celis, G., Christensen, T.R., Christiansen, C.T., Commane, R., Cooper, E.J., Crill, P., Czimczik, C., Davydov, S., Du, J., Egan, J.E., Elberling, B., Euskirchen, E., Friborg, T., Genet, H., Göckede, M., Goodrich, J.P., Peichl, M., Grogan, P., Helbig, M.J., Jafarov, E.E., Jastrow, J.D., Kalhori, A.A.M., Kim, Y., Kimball, J.S., Kutzbach, L., Lara, M.J., Larsen, K.S., Lee, B.-Y., Liu, Z., Loranty, M.M., Lund, M., Lupascu, M., Madani, N., Malhotra, A., Matamala, R., McFarland, J., McGuire, A.D., Michelsen, A., Minions, C., Oechel, W.C., Olefeldt, D., Parmentier, F.-J.W., Pirk, N., Poulter, B., Quinton, W., Rezanezhad, F., Risk, D., Sachs, T., Schaefer, K., Schmidt, N.M., Schuur, E.A.G., Semenchuk, P.R., Shaver, G., Sonnentag, O., Starr, G., Treat, C.C., Waldrop, M.P., Wang, Y., Welker, J., Wille, C., Xiaofeng, X., Zhang, Z., Zhuang, Q., Zona, D., 2019. Large loss of CO2 in winter observed across the northern permafrost region. Nature Climate Change, 9: 852–857. DOI: 10.1038/s41558-019-0592-8.

Parmentier, F.-J.W., Sonnentag, O., Mauritz, M., Virkkala, A.-M., Schuur, E.A.G., 2019. Is the northern permafrost zone a source or a sink for carbon? Eos, 100. DOI: 10.1029/2019EO130507.

Peltola, O., Vesala, T., Gao, Y., Räty, O., Alekseychik, P., Aurela, M., Chojnicki, B., Desai, A.R., Dolman, A.J., Euskirchen, E., Friborg, T., Göckede, M., Helbig, M.J., Humphreys, E., Jackson, R.B., Jocher, G., Joos, F., Klatt, J., Knox, S.H., Kowalska, N., Kutzbach, L., Lienert, S., Lohila, A., Mammarella, I., Nadeau, D., Nilsson, M.B., Oechel, W.C., Peichl, M., Pypker, T., Quinton, W., Rinne, J., Sachs, T., Samson, M., Schmid, H., Sonnentag, O., Wille, C., Zona, D., Aalto, T., 2019. Monthly gridded data product of northern wetland methane emissions based on upscaling eddy covariance observations. Earth System Science Data, 11(3): 1263–1289. DOI: 10.5194/essd-11-1263-2019.

Quinton, W.L., Berg, A., Braverman, M., Carpino, O., Chasmer, L., Connon, R., Craig, J., Devoie, É., Hayashi, M., Haynes, K., Olefeldt, D., Pietroniro, A., Rezanezhad, F., Schincariol, R., Sonnentag, O., 2019. A synthesis of three decades of hydrological research at Scotty Creek, NWT, Canada. Hydrology and Earth System Sciences, 23(4): 2015–2039. DOI: 10.5194/hess-23-2015-2019.

Sonnentag, O., 2019. Changing boreal forest-atmosphere interactions across northwestern Canada in response to increasing natural and anthropogenic pressures. Texas A & M University; Department of Geography seminar series. College Station, Texas.

Stone, L.E., Fang, X., Haynes, K.M., Helbig, M.J., Pomeroy, J.W., Sonnentag, O., Quinton, W.L., 2019. Modelling the effects of permafrost loss on discharge from a wetland‐dominated, discontinuous permafrost basin. Hydrological Processes, 33(20): 2607-2626. DOI: 10.1002/hyp.13546.

Wilcox, E.J., Keim, D., de Jong, T., Walker, B., Sonnentag, O., Sniderhan, A.E., Mann, P., Marsh, P., 2019. Tundra shrub expansion may amplify permafrost thaw by advancing snowmelt timing. Arctic Science, 5(4): 202-217. DOI: 10.1139/as-2018-0028.

Filippa, G., Cremonese, E., Migliavacca, M., Galvagno, M., Sonnentag, O., Humphreys, E., Hufkens, K., Ryu, Y., Vervaillie, J., Morra di Cella, U., Richardson, A.D., 2018. NDVI derived from near-infrared-enabled digital cameras: Applicability across different plant functional types. Agricultural and Forest Meteorology, 249: 275-285. DOI: 10.1016/j.agrformet.2017.11.003.

Fisher, J.B., Hayes, D.J., Schwalm, C.R., Huntzinger, D.N., Stofferahn, E., Schaefer, K., Luo, Y., Wullschleger, S.D., Goetz, S., Miller, C.E., Griffith, P., Chadburn, S., Chatterjee, A., Ciais, P., Douglas, T.A., Genet, H., Ito, A., Neigh, S.R., Poulter, B., Rogers, B.M., Sonnentag, O., Tian, H., Wang, W., Xue, Y., Yang, Z.-L., Zeng, N., Zhang, Z., 2018. Missing pieces to modeling the Arctic-Boreal puzzle. Environmental Research Letters, 13(2): 020202. DOI: 10.1088/1748-9326/aa9d9a.

Franz, D., Acosta, M., Altimir, N., Arriga, N., Arrouays, D., Aubinet, M., Aurela, M., Ayres, E., López-Ballesteros, A., Barbaste, M., Berveiller, D., Biraud, S., Boukir, H., Brown, T., Brümmer, C., Buchmann, N., Burba, G., Carrara, A., Cescatti, A., Ceschia, E.I., Clement, R., Cremonese, E., Crill, P., Darenova, D., Dengel, S., D'Odorico, P., Filippa, G., Fleck, S., Fratini, G., Fuß, R., Gielen, B., Gogo, S., Grace, J., Graf, A., Grelle, A., Gross, P., Grünwald, T., Haapanala, S., Hehn, M., Heinesch, B., Heiskanen, J., Herbst, M., Herschlein, C., Hörtnagl, L., Hufkenz, K., Ibrom, A., Jolivet, C., Joly, L., Jones, M., Kiese, R., Klemedtsson, L., Kljun, N., Klumpp, K., Kolari, P., Kolle, O.V.R., Kowalski, A., Kutsch, W., Laurila, T., de Ligne, A., Linder, S., Lindroth, A., Lohila, A., Longdoz, B., Mammarella, I., Manise, T., Maraňón Jiménez, S., Matteucci, G., Mauder, M., Meier, P., Merbold, L., Mereu, S., Metzger, S., Migliavacca, M., Mölder, M., Montagnani, L., Moureaux, C., Nelson, D., Nemitz, E., Nicolini, G., Nilsson, M.B., Op de Beeck, M., Osborne, B., Ottosson Löfvenius, M., Pavelka, M., Peichl, M., Peltola, O., Pihlatie, M., Pitacco, A., Pokorný, R., Pumpanen, J., Ratié, C., Rebmann, C., Roland, M., Sabbatini, S., Saby, N.P.A., Saunders, M., Schmid, H., Schrumpf, M., Sedlák, P., Serrano Ortiz, P., Siebicke, L., Šigut, L., Silvennoinen, H., Simioni, G., Skiba, U., Sonnentag, O., Soudani, K., Soulé, P., Steinbrecher, R., Tallec, T., Thimonier, A., Tuittila, E.-S., Tuovinen, J.-P., Vestin, P., Vincent, G., Vincke, C., Vitale, D., Waldner, P., Weslien, P., Wingate, L., Wohlfahrt, G., Zahniser, M., Vesala, T., 2018. Towards long-term standardised carbon and greenhouse gas observations for monitoring Europe's terrestrial ecosystems: a review. International Agrophysics, 32(4): 439-455. DOI: 10.1515/intag-2017-0039.

Gielen, B., Acosta, M., Altimir, N., Buchmann, N., Cescatti, A., Ceschia, E.I., Fleck, S., Hörtnagl, L., Klumpp, K., Kolari, P., Lohila, A., Loustau, D., Maraňón Jiménez, S., Manise, T., Matteucci, G., Merbold, L., Metzger, S., Moureaux, C., Montagnani, L., Nilsson, M.B., Osborne, B., Papale, D., Pavelka, M., Saunders, M., Simioni, G., Soudani, K., Sonnentag, O., Tallec, T., Tuittila, E.-S., Peichl, M., Pokorny, R., Vincke, C., Wohlfahrt, G., 2018. Ancillary vegetation measurements at ICOS ecosystem stations. International Agrophysics, 32(4): 645-664. DOI: 10.1515/intag-2017-0048.

Loranty, M.M., Abbott, B.W., Blok, D., Douglas, T.A., Epstein, H.E., Forbes, B.C., Jones, B.M., Kholodov, A.L., Kropp, H., Malhotra, A., Mamet, S.D., Myers-Smith, I., Natali, S.M., O'Donnell, J.A., Phoenix, G.K., Rocha, A.V., Sonnentag, O., Tape, K.D., Walker, D.A., 2018. Reviews and syntheses: Changing ecosystem influences on soil thermal regimes in northern high-latitude permafrost regions. Biogeosciences, 15(17): 5287–5313. DOI: 10.5194/bg-15-5287-2018.

Mavrovic, A., Roy, A.R., Royer, A., Filali, B., Boone, F., Pappas, C., Sonnentag, O., 2018. Dielectric characterization of vegetation at L band using an open-ended coaxial probe. Geoscientific Instrumentation, Methods and Data Systems, 7(3): 195-208. DOI: 10.5194/gi-7-195-2018.

Pappas, C., Matheny, A.M., Baltzer, J.L., Barr, A.G., Black, T.A., Gil, B., Detto, M., Maillet, J., Roy, A.R., Sonnentag, O., Stephens, J., 2018. Boreal tree hydrodynamics: asynchronous, diverging, yet complementary. Tree Physiology, 38(7): 953-964. DOI: 10.1093/treephys/tpy043.

Peichl, M., Gažovič, M., Vermeij, I., de Goede, E., Sonnentag, O., Limpens, J., Nilsson, M.B., 2018. Peatland vegetation composition and phenology drive the seasonal trajectory of maximum gross primary production. Scientific Reports, 8, 8012. DOI: 10.1038/s41598-018-26147-4.

Peters, R.L., Fonti, P., Frank, D.C., Poyatos, R., Pappas, C., Kahmen, A., Carraro, V., Prendin, A.L., Schneider, L., Baltzer, J.L., Baron-Gafford, G.A., Dietrich, L., Heinrich, I., Minor, R.L., Sonnentag, O., Matheny, A.M., Wightman, M.G., Steppe, K., 2018. Quantification of uncertainties in conifer sap flow measured with the thermal dissipation method. New Phytologist, 219(4): 1283-1299. DOI: 10.1111/nph.15241.

Pisek, J., Buddenbaum, H.J., Camacho, F., Hill, J., Jensen, J.L.R., Lange, H., Piayda, A., Qu, Y., Roupsard, O., Serbin, S.P., Solberg, S., Sonnentag, O., Thimonier, A., Vuolo, F., 2018. Data synergy between leaf area index and clumping index Earth Observation products using photon recollision probability theory. Remote Sensing of Environment, 215: 1-6. DOI: 10.1016/j.rse.2018.05.026.

Rapinski, M., Payette, F., Sonnentag, O., Herrmann, T.M., Royer, M.-J.S., Siegwart Collier, L., Hermanutz, L., Guanish, G., Elders of Kawawachikamach,., Elders of Kangiqsualujjuaq,., Elders of Nain,., 2018. Listening to Inuit and Naskapi peoples in the eastern Canadian Subarctic: a quantitative comparison of local observations with gridded climate data. Regional Environmental Change, 18(1): 189-203. DOI: 10.1007/s10113-017-1188-3.

Sonnentag, O., 2018. A thawing boreal peat landscape is carbon neutral. Environmental Geochemical Cycle seminar series, apan Agency for Marine-Earth Science and Technology. Yokohama.

Sonnentag, O., 2018. A thawing boreal peat landscape is carbon neutral. Environmental Science and Technology seminar series, Osaka Prefecture University. Sakai.

Sonnentag, O., 2018. High-latitude land surface-atmosphere interactions. Department of Environmental Sciences seminar series, Jawaharlal Nehru University. New Delhi.

Sonnentag, O., 2018. On the need to integrate (extrapolated) environmental measurements into spatial data infrastructures for improved monitoring of high-latitude climate change impacts. Spatial Data Infrastructure Summit 2018. Whitehorse, Yukon.

Warren, R.K., Pappas, C., Helbig, M.J., Chasmer, L.E., Berg, A.A., Baltzer, J.L., Quinton, W.L., Sonnentag, O., 2018. Minor contribution of overstorey transpiration to landscape evapotranspiration in boreal permafrost peatlands. Ecohydrology, 11(5): e1975. DOI: 10.1002/eco.1975.

Helbig, M.J., Chasmer, L.E., Desai, A.R., Kljun, N., Quinton, W.L., Sonnentag, O., 2017. Direct and indirect climate change effects on carbon dioxide fluxes in a thawing boreal forest–wetland landscape. Global Change Biology, 23(8): 3231–3248. DOI: 10.1111/gcb.13638.

Helbig, M.J., Chasmer, L.E., Kljun, N., Quinton, W.L., Treat, C.C., Sonnentag, O., 2017. The positive net radiative greenhouse gas forcing of increasing methane emissions from a thawing boreal forest-wetland landscape. Global Change Biology, 23(6): 2413-2427. DOI: 10.1111/gcb.13520.

Helbig, M.J., Quinton, W.L., Sonnentag, O., 2017. Warmer spring conditions increase annual methane emissions from a boreal peat landscape with sporadic permafrost. Environmental Research Letters, 12(11): 115009. DOI: 10.1088/1748-9326/aa8c85.

Pelletier, N., Talbot, J., Olefeldt, D., Turetsky, M., Blodau, C., Sonnentag, O., Quinton, W.L., 2017. Influence of Holocene permafrost aggradation and thaw on the paleoecology and carbon storage of a peatland complex in northwestern Canada. The Holocene, 27(9): 1391-1405. DOI: 10.1177/0959683617693899.

Richardson, A.D., Hufkens, K., Milliman, T., Aubrecht, D.M., Chen, M., Gray, J.M., Johnston, M.R., Keenan, T.F., Klosterman, S., Kosmala, M., Melaas, E.K., Friedl, M.A., Frolking, S., Alber, M., Abraha, M., Apple, M., Law, B.E., Black, T.A., Blanken, P., Browning, D., Bret-Harte, S., Brunsell, N., Burns, S.P., Cremonese, E., Desai, A.R., Dunn, A.L., Eissenstat, D.M., Euskirchen, S.E., Flanagan, L.B., Forsythe, B., Gallagher, J., Gu, L., Hollinger, D.Y., Jones, J.W., King, J., Langvall, O., McCaughey, J.H., McHale, P.J., Meyer, G.A., Mitchell, M.J., Migliavacca, M., Nesic, Z., Noormets, A., Novick, K., O'Connell, J., Oishi, A.C., Oswald, W.W., Perkins, T.D., Phillips, R.P., Schwartz, M.D., Scott, R.L., Sonnentag, O., Thom, J.E., 2017. PhenoCam Dataset v1.0: Vegetation Phenology from Digital Camera Imagery, 2000-2015. ORNL DAAC. DOI: 10.3334/ORNLDAAC/1511.

Roy, A.R., Toose, P., Derksen, C., Rowlandson, T., Berg, A.A., Lemmetyinen, J., Royer, A., Tetlock, E., Helgason, W., Sonnentag, O., 2017. Spatial variability of L-band brightness temperature during freeze/thaw events over a prairie environment. Remote Sensing, 9(9): 894. DOI: 10.3390/rs9090894.

Sonnentag, O., 2017. Biogéosciences atmosphériques: une approche interdisciplinaire pour l'étude de l'évolution rapide des interactions terre-atmosphère en hautes latitudes. CARTEL et Département de géomatique applique seminar series, Université de Sherbrooke. Sherbrooke, Québec.

Sonnentag, O., 2017. Changing land-atmosphere interactions of thawing boreal forest landscapes in northwestern Canada. College of Science seminar series, Swansea University. Swansea.

Sonnentag, O., 2017. Changing land-atmosphere interactions of thawing boreal forest landscapes in northwestern Canada. Department of Building, Civil and Engineering seminar series, Concordia University. Montréal, Québec.

Sonnentag, O., 2017. Changing land-atmosphere interactions of thawing boreal forest landscapes in northwestern Canada. Ecosystem Sciences seminar series, Swedish Agricultural University. Umeå.

Sonnentag, O., 2017. Changing land-atmosphere interactions of thawing boreal forest landscapes in northwestern Canada. Life and Environmental Sciences seminar series, University of Iceland. Reykjavik.

Brown, T.B., Hultine, K.R., Steltzer, H., Denny, E.G., Denslow, M.W., Granados, J., Henderson, S., Moore, D., Nagai, S., SanClements, M., Sánchez-Azofeifa, A., Sonnentag, O., Tazik, D., Richardson, A.D., 2016. Using phenocams to monitor our changing Earth: toward a global phenocam network. Frontiers in Ecology and the Environment, 14(2): 84-93. DOI: 10.1002/fee.1222.

Helbig, M.J., Pappas, C., Sonnentag, O., 2016. Permafrost thaw and wildfire: equally important drivers of boreal tree cover changes across the Taiga Plains, Canada. Geophysical Research Letters, 43(4): 1598-1606. DOI: 10.1002/2015GL067193.

Helbig, M.J., Wischnewski, K., Chasmer, L., Kljun, N., Quinton, W.L., Detto, M., Sonnentag, O., 2016. Permafrost thaw in a boreal forest-wetland landscape increases methane emissions. Mer Bleue Meeting 2016, McGill University. Montréal, Québec, Canada.

Helbig, M.J., Wischnewski, K., Gosselin, G.H., Biraud, S.C., Bogoev, I., Chan, W.S., Euskirchen, E.S., Glenn, A.J., Marsh, P.M., Quinton, W.L., Sonnentag, O., 2016. Addressing a systematic bias in carbon dioxide flux measurements with the EC150 and the IRGASON open-path gas analyzers. Agricultural and Forest Meteorology, 228-229: 349-359. DOI: 10.1016/j.agrformet.2016.07.018.

Helbig, M.J., Wischnewski, K., Kljun, N., Chasmer, L.E., Quinton, W.L., Detto, M., Sonnentag, O., 2016. Regional atmospheric cooling and wetting effect of permafrost thaw-induced boreal forest loss. Global Change Biology, 22(12): 4048-4066. DOI: 10.1111/gcb.13348.

Helbig, M.J., Wischnewski, K., Kljun, N., Chasmer, L., Quinton, W.L., Detto, M., Sonnentag, O., 2016. Les effets des changements de la couverture terrestre dans la zone de pergélisol sporadique sur les flux turbulents d’énergie à l’échelle du paysage. Colloque du CEN 2016, Université du Québec à Trois-Rivières. Trois-Rivières, Québec, Canada.

Hwang, Y., Ryua, Y., Kimm, H., Jiang, C., Lang, M., Macfarlane, C., Sonnentag, O., 2016. Correction for light scattering combined with sub-pixel classification improves estimation of gap fraction from digital cover photography. Agricultural and Forest Meteorology, 222: 32-44. DOI: 10.1016/j.agrformet.2016.03.008.

Moore, C.E., Brown, T.B., Keenan, T.F., Duursma, R.A., van Dijk, A.I.J.M., Beringer, J., Culvenor, D., Evans, B., Huete, A., Hutley, L.B., Maier, S., Restrepo-Coupe, N., Sonnentag, O., Specht, A., Taylor, J.R., van Gorsel, E., Liddell, M.J., 2016. Reviews and syntheses: Australian vegetation phenology: new insights from satellite remote sensing and digital repeat photography. Biogeosciences, 13: 5085-5102. DOI: 10.5194/bg-13-5085-2016.

Op de Beeck, M., Gielen, B., Merbold, L., Sonnentag, O., 2016. Ancillary vegetation measurements in grasslands. Rapport préparé pour Integrated Carbon Observation System Ecosystem Thematic Center. 46 pages.

Sonnentag, O., 2016. Atmospheric Biogeosciences at High Latitudes: what is it all about? Department of Geology seminar series. Thiruvananthapuram, Inde.

Sonnentag, O., 2016. Can we track plant development status in peatland ecosystems with near-surface sensing technologies? Mer Bleue Meeting 2016, McGill University. Montréal, Québec, Canada.

Sonnentag, O., 2016. Permafrost thaw and fire history: implications of boreal tree cover changes on carbon, water and energy fluxes across the Taiga Plains, Northwest Territories, Canada. Harvard University, Harvard University Herbaria seminar series. Cambridge, Massachusetts, États-Unis.

Sonnentag, O., 2016. Permafrost thaw and fire history: implications of boreal tree cover changes on carbon, water and energy fluxes across the Taiga Plains, Northwest Territories, Canada. Shinto University, Environmental Sciences seminar series. Matsumoto, Japon.

Sonnentag, O., 2016. Permafrost thaw and fire history: implications of boreal tree cover changes on carbon, water and energy fluxes across the Taiga Plains, Northwest Territories, Canada. University of Kerala, Environmental Sciences seminar series. Thiruvananthapuram, Inde.

Sonnentag, O., 2016. Permafrost thaw and fire history: implications of boreal tree cover changes on land surface properties and turbulent energy fluxes in the Taiga Plains, Canada. Ohio State University, Environmental Engineering seminar series. Columbus, Ohio, États-Unis.

Sonnentag, O., 2016. Permafrost thaw and fire history: implications of boreal tree cover changes on regional climates in the Taiga Plains, Northwest Territories. Legislative Assembly Ledge Talks series. Yellowknife, Territoires du Nord-Ouest, Canada.

Sonnentag, O., 2016. Sensible heat bias in open-path eddy covariance carbon dioxide flux measurements. Japan Agency for Marine-Earth Science and Technology, Environmental Geochemical Cycle seminar series. Yokohama, Japon.

Sonnentag, O., 2016. Toward a global network of digital cameras to monitor our changing planet. Department of Civil Engineering seminar series. Cannanore, Inde.

Sonnentag, O., Helbig, M.J., Wischnewski, K., Humphreys, E.R., Quinton, W.L., Bogoev, I., 2016. Le biais introduit par la chaleur sensible sur les flux de dioxyde de carbone mesurés par techniques de covariance des turbulences à trajet ouvert. Colloque du CEN 2016, Université du Québec à Trois-Rivières. Trois-Rivières, Québec, Canada.

Warren, R., Pappas, C., Helbig, M.J., Sonnentag, O., 2016. Partitioning evapotranspiration in subarctic peatland based on ecosystem-level eddy covariance and sap flow measurements. Mer Bleue Meeting 2016, McGill University. Montréal, Québec, Canada.

Wischnewski, K., Helbig, M.J., Kljun, N., Chasmer, L., Marsh, P., Quinton, W.L., Sonnentag, O., Gosselin, H.G., 2016. De 10 hz à 30 minutes: procédure standardisée pour le post-traitement des données de covariance des turbulences aux Territoires du Nord-Ouest. Colloque du CEN 2016, Université du Québec à Trois-Rivières. Trois-Rivières, Québec, Canada.

Connon, R.F., Quinton, W.L., Craig, J.R., Hanisch, J., Sonnentag, O., 2015. The hydrology of interconnected bog complexes in discontinuous permafrost terrains. Hydrological Processes, 29(18): 3831-3847. DOI: 10.1002/hyp.10604.

Detto, M., Asner, G.P., Muller-Landau, H.C., Sonnentag, O., 2015. Spatial variability in tropical forest leaf area density from multireturn lidar and modeling. Journal of Geophysical Research - Biogeosciences, 120(2): 294-309. DOI: 10.1002/2014JG002774.

Garon-Labrecque, M.-È., Léveillé-Bourret, É., Higgins, K., Sonnentag, O., 2015. Additions to the boreal flora of the Northwest Territories with a preliminary vascular flora of Scotty Creek. The Canadian Field-Naturalist, 129(4): 349-367. DOI: 10.22621/cfn.v129i4.1757.

Matthes, J.H., Knox, S.H., Sturtevant, C., Sonnentag, O., Verfaillie, J., Baldocchi, D., 2015. Predicting landscape-scale CO2 flux at a pasture and rice paddy with long-term hyperspectral canopy reflectance measurements. Biogeosciences, 12: 4577-4594. DOI: 10.5194/bg-12-4577-2015.

Peichl, M., Sonnentag, O., Nilsson, M.B., 2015. Bringing color into the picture: using digital repeat photography to investigate phenology controls of the carbon dioxide exchange in a boreal mire. Ecosystems, 18: 115-131. DOI: 10.1007/s10021-014-9815-z.

Raabe, K., Pisek, J., Sonnentag, O., Annuk, K., 2015. Variations of leaf inclination angle distribution with height over the growing season and light exposure for eight broadleaf tree species. Agricultural and Forest Meteorology, 214-215: 2-11. DOI: 10.1016/j.agrformet.2015.07.008.

Sonnentag, O., 2015. Monitoring our changing Earth with digital cameras. The Chinese University of Hong Kong, Earth System Science Programme seminar series. Hong Kong, Chine (République populaire de).

Sonnentag, O., 2015. Sensible heat bias in open-path eddy covariance carbon dioxide flux measurements. Karlsruhe Institute of Technology, Department of Applied Geology seminar series. Karlsruhe, Allemagne.

Sonnentag, O., 2015. The Taiga Plains Research Network: Observing net carbon, water and heat exchanges across a latitudinal permafrost gradient in northwestern Canada for improved understanding of high latitude ecosystem responses to climate change. Monash University, School of Earth, Atmosphere and Environment seminar series. Melbourne, Australie.

Sonnentag, O., 2015. The Taiga Plains Research Network: Observing net carbon, water and heat exchanges across a latitudinal permafrost gradient in northwestern Canada for improved understanding of high latitude ecosystem responses to climate change. The Chinese University of Hong Kong, Department of Geography seminar series. Hong Kong, Chine (République populaire de).

Toomey, M., Friedl, M.A., Frolking, S., Hufkens, K., Klosterman, S., Sonnentag, O., Baldocchi, D., Bernacchi, C., Biraud, S.C., Bohrer, G., Brzostek, E., Burns, S.P., Coursolle, C., Hollinger, D., Margolis, H., McCaughey, H., Monson, R.K., Munger, W.J., Pallardy, S., Phillips, R.P., Torn, M.S., Wharton, S., Zeri, M., Richardson, A.D., 2015. Greenness indices from digital cameras predict the timing and seasonal dynamics of canopy-scale photosynthesis. Ecological Applications, 25(1): 99-115. DOI: 10.1890/14-0005.1.

Talbot, J., Roulet, N.T., Sonnentag, O., Moore, T.R., 2014. Increases in aboveground biomass and leaf area 85 years after drainage in a bog. Botany, 92(10): 713-721. DOI: 10.1139/cjb-2013-0319.

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