Université de Montréal 520, chemin de la Côte-Ste-Catherine
Université de Montréal
Montréal
Québec, Canada
H2V 2B8
514.343.8032
oliver.sonnentag@umontreal.ca
Bennett, Kathryn (Doctorat). L'impact du dégel du pergélisol sur la dynamique spatiale et temporelle des gaz à effet de serre dans les zones de pergélisol.
Gorrab ep El Khedhri, Azza (Post-Doctorat - Codirection). Suivi des traits hydrauliques des arbres à partir des produits de la profondeur optique de la végétation (VOD) issus des observations micro-ondes passives: cas de la forêt boréale.
Mavrovic, Alex (Doctorat - Codirection). Suivi des flux de carbone des régions arctiques par télédétection satellitaire micro-onde multifréquence.
Qu, Bo (Doctorat). Assimilation de données satellitaires micro-ondes passives dans un modèle écosystémique pour l’amélioration des estimations de productivité de la forêt boréale au Canada.
Roy, Camille (Maîtrise - Codirection). Suivi des stratégies hydrauliques d’arbre en forêt boréale à partir de mesures et de modélisation.
Voigt, Carolina (Post-Doctorat). Mise en relation des flux de gaz à effet de serre souterrains et en surface dans la région arctique boréale du Canada.
El-Amine, Mariam , 2020 (Maîtrise). Contrôles environnementaux de la variabilité interannuelle de la reprise et de la fin de la photosynthèse au sein de la forêt boréale nord-américaine .
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.
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.
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.
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.
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.
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.
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.
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., 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.
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.
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.
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.