Campus de Sherbrooke
2500, boul. de l'Université
Université de Sherbrooke
Sherbrooke
Québec, Canada
J1K 2R1
819.821.8000 #62286
Alain.Royer@usherbrooke.ca
Kramer, Daniel (Doctorat - Codirection). Caractérisation spatio-temporelle de la neige à l’aide de la modélisation haute-résolution, de la télédétection micro-ondes et des drones dans l’Archipel Arctique Canadien.
Meloche, Julien (Post-Doctorat - Codirection). L’apport de la caractérisation de la microstructure du manteaux neigeux arctique en contexte de transfert radiatif micro-ondes.
Sasseville, Vincent (Doctorat - Codirection). Implémentation d'un index de qualité de l'habitat du caribou de Peary en fonction des propriétés géophysiques de la neige obtenues par télédétection et modélisation.
Vargel, Céline , 2020 (Doctorat). Caractérisation du manteau neigeux arctique, suivi climatique et télédétection micro-onde .
Laliberté, J., Langlois, A., Royer, A., Madore, J.-B., Gauthier, F., 2022. Retrieving dry snow stratigraphy using a versatile low-cost frequency modulated continuous wave (FMCW) K-band radar. Physical Geography, 43(3): 308-332. DOI: 10.1080/02723646.2021.2008104.
Meloche, J., Langlois, A., Rutter, N., McLennan, D., Royer, A., Billecocq, P., Ponomarenko, S., 2022. High-resolution snow depth prediction using Random Forest algorithm with topographic parameters: A case study in the Greiner watershed, Nunavut. Hydrobiologia, 36(3), e14546. DOI: 10.1002/hyp.14546.
Meloche, J., Langlois, A., Rutter, N., Royer, A., King, J., Walker, B., Philip, M., Wilcox, E., 2022. Characterizing tundra snow sub-pixel variability to improve brightness temperature estimation in satellite SWE retrievals. The Cryosphere, 16(1): 87-101. DOI: 10.5194/tc-16-87-2022.
Voglimacci, J., Wendleder, A., Lantuit, H., Langlois, A., Stettner,., Schmitt, A., Roth, A., Dedieu, J.-P., Royer, A., 2022. Potential of X-band polarimetric SAR co-polar phase difference for arctic snow depth estimation. The Cryosphere, 16(6): 2163-2181. DOI: 10.5194/tc-2021-314.
Mavrovic, A., Pardo Lara, R., Berg, A., Demontoux, F., Royer, A., Roy, A.R., 2021. Soil dielectric characterization during freeze–thaw transitions using L-band coaxial and soil moisture probes. Hydrology and Earth System Sciences, 25: 1117-1131. DOI: 10.5194/hess-25-1117-2021.
Meloche, J., Royer, A., Langlois, A., Rutter, N., Sasseville, V., 2021. Improvement of microwave emissivity parameterization of frozen Arctic soils using roughness measurements derived from photogrammetry. International Journal of Digital Earth, 14(10: Remote Sensing Experiments for Earth System Science): 1380-1396. DOI: 10.1080/17538947.2020.1836049.
Royer, A., Domine, F., Roy, A.R., Langlois, A., Marchand, N., Davesne, G., 2021. New northern snowpack classification linked to vegetation cover on a latitudinal mega-transect across northeastern Canada. Écoscience, 28(3-4): 225-242. DOI: 10.1080/11956860.2021.1898775.
Royer, A., Picard, G., Vargel, C., Langlois, A., Gouttevin, I., Dumont, M., 2021. Improved simulation of arctic circumpolar land area snow properties and soil temperatures. Frontiers in Earth Science, 9, 685140. DOI: 10.3389/feart.2021.685140.
Royer, A., Roy, A.R., Jutras, S., Langlois, A., 2021. Review article: Performance assessment of radiation-based field sensors for monitoring the water equivalent of snow cover (SWE). The Cryosphere, 15: 5079-5098. DOI: 10.5194/tc-15-5079-2021.
Langlois, A., Royer, A., Montpetit, B., Roy, A.R., Durocher, M., 2020. Presenting snow grain size and shape distributions in northern Canada using a new photographic device allowing 2D and 3D representation of snow grains. Frontiers in Earth Science, 7, 347. DOI: 10.3389/feart.2019.00347.
Mavrovic, A., Madore, J.-B., Langlois, A., Royer, A., Roy, A.R., 2020. Snow liquid water content measurement using an open-ended coaxial probe (OECP). Cold Regions Science and Technology, 171, 102958. DOI: 10.1016/j.coldregions.2019.102958.
Pomerleau, P., Royer, A., Langlois, A., Cliche, P., Courtemanche, B., Madore, J.-B., Picard, G., Lefebvre, É., 2020. Low cost and compact FMCW 24 GHz radar applications for snowpack and ice thickness measurements. Sensors, 20(14), 3909. DOI: 10.3390/s20143909 .
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.
Vargel, C., Royer, A., Saint-Jean Rondeau, O., Picard, G., Roy, A.R., Sasseville, V., Langlois, A., 2020. Arctic and subarctic snow microstructure analysis for microwave brightness temperature simulations. Remote Sensing of Environment, 242, 11754. DOI: 10.1016/j.rse.2020.111754.
Prince, M., Roy, A.R., Royer, A., Langlois, A., 2019. Timing and spatial variability of fall soil freezing in boreal forest and its effect on SMAP L-band radiometer measurements. Remote Sensing of Environment, 231, 111230. DOI: 10.1016/j.rse.2019.111230.
Rutter, N., Sandells, M.S., Derksen, C., King, J., Toose, P., Wake, L., Watts, T., Essery, R., Roy, A.R., Royer, A., Marsh, P., Larsen, C., Sturm, M., 2019. Effect of snow microstructure variability on Ku-band radar snow water equivalent retrievals. The Cryosphere, 13(11): 3045–3059. DOI: 10.5194/tc-13-3045-2019.
Dolant, C., Langlois, A., Brucker, L., Royer, A., Roy, A.R., Montpetit, B., 2018. Meteorological inventory of rain-on-snow events in the Canadian Arctic Archipelago and satellite detection assessment using passive microwave data. Physical Geography, 39(5): 428-444. DOI: 10.1080/02723646.2017.1400339.
Dolant, C., Montpetit, B., Langlois, A., Brucker, L., Zolina, O., Johnson, C., Royer, A., Smith, P., 2018. Assessment of the Barren Ground caribou die‐off during winter 2015–2016 using passive microwave observations. Geophysical Research Letters, 45(10): 4908-4916. DOI: 10.1029/2017GL076752.
Larue, F., Royer, A., DeSève, D., Roy, A.R., Cosme, E., 2018. Assimilation of passive microwave AMSR-2 satellite observations in a snowpack evolution model over northeastern Canada. Hydrology and Earth System Sciences, 22(11): 5711-5734. DOI: 10.5194/hess-22-5711-2018.
Larue, F., Royer, A., DeSève, D., Roy, A.R., Picard, G., Vionnet, V., Cosme, E., 2018. Simulation and assimilation of passive microwave data using a snowpack model coupled to a calibrated radiative transfer model over North‐Eastern Canada. Water Resources Research, 54(7): 4823-4848. DOI: 10.1029/2017WR022132.
Lyu, H., McColl, K.A., Li, X., Derksen, C., Berg, A., Black, T.A., Euskirchen, E., Loranty, M.M., Pulliainen, J., Rautiainen, K., Rowlandson, T., Roy, A.R., Royer, A., Langlois, A., Stephens, J., Lu, H., Entekhabi, D., 2018. Validation of the SMAP freeze/thaw product using categorical triple collocation. Remote Sensing of Environment, 205: 329-337. DOI: 10.1016/j.rse.2017.12.007.
Marchand, N., Royer, A., Krinner, G., Roy, A.R., Langlois, A., Vargel, C., 2018. Snow-covered soil temperature retrieval in Canadian Arctic permafrost areas, using a land surface scheme informed with satellite remote sensing data. Remote Sensing, 10(11), 1703. DOI: 10.3390/rs10111703.
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.
Montpetit, B., Royer, A., Roy, A.R., Langlois, A., 2018. In-situ passive microwave emission model parameterization of sub-arctic frozen organic soils. Remote Sensing of Environment, 205: 112-118. DOI: 10.1016/j.rse.2017.10.033.
Prince, M., Roy, A.R., Brucker, L., Royer, A., Kim, Y., Zhao, T., 2018. Northern Hemisphere surface freeze–thaw product from Aquarius L-band radiometers. Earth System Science Data, 10(4): 2055-2067. DOI: 10.5194/essd-10-2055-2018.
Roy, A.R., Leduc-Leballeur, M., Picard, G., Royer, A., Toose, P., Dersken, C., Lemmetyinen, J., Berg, A., Rowlandson, T., Schwank, M., 2018. Modelling the L-band snow-covered surface emission in a winter canadian prairie environment. Remote Sensing, 10, 1451. DOI: 10.3390/rs10091451.
Blanchard, Y., Royer, A., O'Neill, N., Turner, D.D., Eloranta, E.W., 2017. Thin ice clouds in the Arctic: cloud optical depth and particle size retrieved from ground-based thermal infrared radiometry. Atmospheric Measurement Techniques, 10: 2129-2147. DOI: 10.5194/amt-10-2129-2017.
Busseau, B.-C., Royer, A., Roy, A.R., Langlois, A., Domine, F., 2017. Analysis of snow-vegetation interactions in the low Arctic-Subarctic transition zone (northeastern Canada). Physical Geography, 38(2): 159-175. DOI: 10.1080/02723646.2017.1283477.
Derksen, C., Xu, X., Dunbar, R.S., Colliander, A., Kim, Y., Kimball, J.S., Black, T.A., Euskirchen, E., Langlois, A., Loranty, M.M., Marsh, P., Rautiainen, K., Roy, A.R., Royer, A., Stephens, J., 2017. Retrieving landscape freeze/thaw state from Soil Moisture Active Passive (SMAP) radar and radiometer measurements. Remote Sensing of Environment, 194: 48-62. DOI: 10.1016/j.rse.2017.03.007.
Langlois, A., Johnson, C.-A., Montpetit, B., Royer, A., Blukacz-Richards, E.A., Neave, E., Dolant, C., Roy, A.R., Arhonditsis, G., Kim, D.-K., Kaluskar, S., Brucker, L., 2017. Detection of rain-on-snow (ROS) events and ice layer formation using passive microwave radiometry: A context for Peary caribou habitat in the Canadian Arctic. Remote Sensing of Environment, 189: 84-95. DOI: 10.1016/j.rse.2016.11.006.
Larue, F., Royer, A., DeSève, D., Langlois, A., Roy, A.R., Brucker, L., 2017. Validation of GlobSnow-2 snow water equivalent over Eastern Canada. Remote Sensing of Environment, 194: 264-277. DOI: 10.1016/j.rse.2017.03.027.
Ouellet, F., Langlois, A., Blukacz-Richards, E.A., Johnson, C., Royer, A., Neave, E., Larter, N.C., 2017. Spatialization of the SNOWPACK snow model for the Canadian Arctic to assess Peary caribou winter grazing conditions. Physical Geography, 38(2): 143-158. DOI: 10.1080/02723646.2016.1274200.
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.
Roy, A.R., Toose, P., Williamson, M., Rowlandson, T., Derksen, C., Royer, A., Berg, A.A., Lemmetyinen, J., Arnold, L., 2017. Response of L-Band brightness temperatures to freeze/thaw and snow dynamics in a prairie environment from ground-based radiometer measurements. Remote Sensing of Environment, 191: 67-80. DOI: 10.1016/j.rse.2017.01.017.
Royer, A., Roy, A.R., Montpetit, B., Saint-Jean Rondeau, O., Picard, G., Brucker, L., Langlois, A., 2017. Comparison of commonly-used microwave radiative transfer models for snow remote sensing. Remote Sensing of Environment, 190: 247-259. DOI: 10.1016/j.rse.2016.12.020.
Toose, P., Roy, A.R., Solheim, F., Derksen, C., Watts, T., Royer, A., Walker, A., 2017. Radio-frequency interference mitigating hyperspectral L-band radiometer. Geoscientific Instrumentation, Methods and Data Systems, 6(1): 39-51. DOI: 10.5194/gi-6-39-2017.
Wigneron, J.-P., Jackson, T.J., O'Neill, P., De Lannoy, G., de Rosnay, P., Walker, J.P., Ferrazzoli, P., Mironov, V., Bircher, S., Grant, J.P., Kurum, M., Schwank, M., Munoz-Sabater, J., Das, N., Royer, A., Al-Yaari, A., Al Bitar, A., Fernandez-Moran, R., Lawrence, H., Mialon, A., Parrens, M., Richaume, P., Delwart, S., Kerr, Y., 2017. Modelling the passive microwave signature from land surfaces: A review of recent results and application to the L-band SMOS & SMAP soil moisture retrieval algorithms. Remote Sensing of Environment, 192: 238-262. DOI: 10.1016/j.rse.2017.01.024.
Dolant, C., Langlois, A., Montpetit, B., Brucker, L., Roy, A.R., Royer, A., 2016. Development of a rain-on-snow detection algorithm using passive microwave radiometry. Hydrological Processes, 30(18): 3184-3196. DOI: 10.1002/hyp.10828.
Papasodoro, C., Royer, A., Langlois, A., Berthier, É., 2016. Potential of RADARSAT-2 stereo radargrammetry for the generation of glacier DEMs. Journal of Glaciology, 62(233): 486-496. DOI: 10.1017/jog.2016.44.
Roy, A.R., Royer, A., St-Jean-Rondeau, O., Montpetit, B., Picard, G., Mavrovic, A., Marchand, N., Langlois, A., 2016. Microwave snow emission modeling uncertainties in boreal and subarctic environments. The Cryosphere, 10(2): 623-638. DOI: 10.5194/tc-10-623-2016.
André, C., Ottlé, C., Royer, A., Maignan, F., 2015. Land surface temperature retrieval over circumpolar Arctic using SSM/I–SSMIS and MODIS data. Remote Sensing of Environment, 162: 1-10. DOI: 10.1016/j.rse.2015.01.028.
Courtemanche, B., Montpetit, B., Royer, A., Roy, A.R., 2015. Creation of a lambertian microwave surface for retrieving the downwelling contribution in ground-based radiometric measurements. IEEE Transactions on Geoscience and Remote Sensing, 12(3): 462-466. DOI: 10.1109/LGRS.2014.2346138.
Montpetit, B., Royer, A., Wigneron, J.-P., Chanzy, A., Mialon, A., 2015. Evaluation of multi-frequency bare soil microwave reflectivity models. Remote Sensing of Environment, 162: 186-195. DOI: 10.1016/j.rse.2015.02.015.
Papasodoro, C., Berthier, É., Royer, A., Zdanowicz, C., Langlois, A., 2015. Area, elevation and mass changes of the two southernmost ice caps of the Canadian Arctic Archipelago between 1952 and 2014. The Cryosphere, 9: 1535-1550. DOI: 10.5194/tc-9-1535-2015.
Roy, A.R., Royer, A., Derksen, C., Brucker, L., Langlois, A., Mialon, A., Kerr, Y.H., 2015. Evaluation of spaceborne L-band radiometer measurements for terrestrial freeze/thaw retrievals in Canada. IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 8(9): 4442-4459. DOI: 10.1109/JSTARS.2015.2476358.
Bergeron, J., Royer, A., Turcotte, R., Roy, A.R., 2014. Snow cover estimation using blended MODIS and AMSR-E data for improved watershed-scale spring streamflow simulation in Quebec, Canada. Hydrological Processes, 28: 4626-4639. DOI: 10.1002/hyp.10123.
Dupont, F., Picard, G., Royer, A., Fily, M., Roy, A.R., Langlois, A., Champollion, N., 2014. Modeling the microwave emission of bubbly ice: Applications to blue ice and superimposed ice in the Antarctic and Arctic. IEEE Transactions on Geoscience and Remote Sensing, 52(10): 6639-6651. DOI: 10.1109/TGRS.2014.2299829.
Langlois, A., Bergeron, J., Brown, R., Royer, A., Harvey, R., Roy, A.R., Wang, L., Thériault, N., 2014. Evaluation of CLASS 2.7 and 3.5 simulations of snow properties from the Canadian Regional Climate Model (CRCM4) over Québec, Canada. Journal of Hydrology, 15(4): 1325-1343. DOI: 10.1175/JHM-D-13-055.1.
Picard, G., Royer, A., Arnaud, L., Fily, M., 2014. Influence of meter-scale wind-formed features on the variability of the microwave brightness temperature around Dome C in Antarctica. The Cryosphere, 8: 1105-1119. DOI: 10.5194/tc-8-1105-2014.
Roy, A.R., Royer, A., Hall, R.J., 2014. Relationship between forest microwave transmissivity and structural parameters for the canadian boreal forest. IEEE Transactions on Geoscience and Remote Sensing, 11(10): 1802-1806. DOI: 10.1109/LGRS.2014.2309941.
Rutter, N., Sandells, M., Derksen, C., Toose, P., Royer, A., Montpetit, B., Langlois, A., Lemmetyinen, J., Pulliainen, J., 2014. Snow stratigraphic heterogeneity within ground-based passive microwave radiometer footprints: Implications for emission modeling. Journal of Geophysical Research, 119(3): 550–565. DOI: 10.1002/2013JF003017.