Royer, Alain

Professeur, Faculté des lettres et sciences humaines
FLSH Géomatique appliquée

Coordonnées

Courriel


819-821-8000, poste 62286


Site Web

Diplômes

(1981) Doctorat (Doctorat). Université de Grenoble I - Joseph Fourier.

(1977) Maîtrise avec mémoire (Maîtrise - Maîtrise). Université de Grenoble I - Joseph Fourier.

(1975) Baccalauréat (Baccalauréat). Université de Grenoble I - Joseph Fourier.

Titres de compétence

(2015) Professeur associé. Université du Québec à Montréal.

Professeur titulaire. Université de Sherbrooke.

Présentation

Sujets de recherche

Caractérisation des surfaces, Changements climatiques, impacts, Glace et neige, Risques naturels, Télémétrie (télédétection, radar).

Disciplines de recherche

Climatologie et météorologie.

Mots-clés

changement global, climatologie, Environnement, Physique de la mesure en télédétection, télédétection multispectrale (VIS-IR-MO), transfert radiatif.

Intérêts de recherche

Physique de la mesure en télédétection appliquée à la géophysique de l'environnement: développement de nouveaux indicateurs des changements de l'environnement global à l'échelle du Canada. Étude de l'impact des changements climatiques dans les régions nordiques.

Langues parlées et écrites

Anglais, Français

Publications

Articles de revue

  • Roy A., A. Royer, C. Derksen, L. Brucker, A. Langlois, A. Mialon, and Y. Kerr. (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, doi: 10.1109/JSTARS.(2476358), (Article accepté).
  • Roy A., A. Royer, O. St-Jean-Rondeau, B. Montpetit, G. Picard, A. Mavrovic, N. Marchand, and A. Langlois. (2015). Microwave snow emission modeling uncertaintiesin boreal and subarctic environments. The Cryosphere Discuss., 9, (Article soumis).
  • Papasodoro C., A. Royer, A. Langlois and E. Berthier. (2015). Potential of RADARSAT-2 stereo radargrammetryfor the generation of glacier digital elevation models. J. of Glaciology, (Article soumis).
  • Papasodoro C., E. Berthier, A. Royer, C. Zdanowicz, and A. Langlois. (2015). Area, elevation and mass changes of the two southernmost icecaps of the Canadian Arctic Archipelago between 1952 and 2014. The Cryosphere, 9, 1535-1550. (Article accepté).
  • Montpetit B., A. Royer, J.-P. Wigneron, A. Chanzy and A. Mialon. (2015). Evaluation of multi-frequency bare soil reflectivity models. Remote Sensing of Environment, 162, 186 - 195. (Article publié).
  • André C., C. Ottlé, A. Royer, F. Maignan. (2015). Land Surface Temperature Retrieval over circumpolar Arctic using SSM/I-SSMIS and MODIS Data. Remote Sensing of Environment, 162, 1-10. (Article accepté).
  • Courtemanche B., B. Montpetit, A. Royer and A. Roy. (2015). Creation of a lambertian microwave surface for retrieving the downwelling contribution in ground-based radiometric measurements. IEEE Geoscience and Remote Sensing Letters, 12(3), 462-466. (Article publié).
  • Blanchard Y, A. Royer, N. O'Neill and E. Eloranta. (2014). Cloud optical depth and ice particle size of Arctic thin ice clouds from ground-based thermal radiometry. Journal of Geophysical Research (Atmosphere), (Article soumis).
  • Montpetit B., A. Royer, A. Roy and A. Langlois. (2014). In-situ passive microwave parameterization of sub-arctic frozen organic soils. IEEE Geoscience and Remote Sensing Letters, (Article soumis).
  • Dupont F., G. Picard, A. Royer, M. Fily, A. Roy, A. Langlois and N. Champollion. (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. (Article publié).
  • Montpetit B., A. Royer, A. Roy and A. Langlois. (2014). In-situ passive microwave parameterization of sub-arctic frozen organic soils. IEEE Geoscience and Remote Sensing Letters, (Article soumis).
  • Picard G., A. Royer, L. Arnaud and M. Fily. (2014). Influence of meter-scale wind-formed features on the variability of the microwave brightness temperature around Dome C in Antarctica. The Cryosphere, 8, (Article publié).
  • Roy, A., Royer, A. and Hall, R.J. (2014). Relationship between forest microwave transmissivity and structural parameters for the Canadian boreal forest. IEEE Geoscience and Remote Sensing Letters, 11(10), 1802-1806. (Article publié).
  • Rutter, N., M. Sandells, C. Derksen, P. Toose, A. Royer, B. Montpetit, A. Langlois, J. Lemmetyinen, and J. Pulliainen. (2014). Snow stratigraphic heterogeneity within ground-based passive microwave radiometer footprints: Implications for emission modeling. J. Geophys. Res. Earth Surf., 119(3), 550–565. (Article publié).
  • Langlois, A., Bergeron, J., Brown, R., Royer, A., Harvey, R., Roy, A., Wang, L. and 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. J. of Hydrometeorology, On line, (Article publié).
  • Bergeron J., A. Royer and R. Turcotte. (2014). Snow cover estimation using blended MODIS and AMSR-E data for improved watershed-scale spring streamflow simulation in Quebec, Canada. Hydrological Processes, On line, (Article publié).
  • Montpetit, B., Royer, A., Roy, A., Langlois, A. and Derksen, C. (2013). Snow microwave emission modeling of ice lenses within a snowpack using the Microwave Emission Model for Layered Snowpacks. IEEE Transactions on Geoscience and Remote Sensing, 51(9), 4705- 4717. (Article publié).
  • Chokmani K., M. Bernier and A. Royer. (2013). A Merging Algorithm for Regional Snow Mapping over Eastern Canada from AVHRR and SSM/I Data. Remote Sensing, 5(11), 5463-5487. (Article publié).
  • Roy, A., Picard, G., Royer, A., Montpetit, B., Dupont, F., Langlois, A., C. Derksen and N. Champolion. (2013). Brightness temperature simulations of the Canadian seasonal snowpack driven by measurements of snow specific surface area. IEEE Transactions on Geosciences and Remote Sensing, 51(9), 4692-4704. (Article publié).
  • Picard, G., Brucker, L., Roy, A., Dupont, F., Fily, M., Royer, A., and Harlow, C. (2013). Simulation of the microwave emission of multi-layered snowpacks using the Dense Media Radiative transfer theory: the DMRT-ML model. Geoscientific Model Development, 6, 1061-1078. (Article publié).
  • Roy A., A. Royer, B. Montpetit, P.A. Bartlett, and A. Langlois. (2013). Snow specific surface area simulation using the one-layer snow model in the Canadian LAnd Surface Scheme (CLASS). The Cryosphere, 7, 961-975. (Article publié).
  • Langlois, A., Royer, A., Derksen, C., Montpetit, B., Dupont, F. and Goita, K. (2012). Coupling of the snow thermodynamic model SNOWPACK with the Microwave Emission Model for Layered Snowpacks (MEMLS) for subarctic and arctic Snow Water Equivalent retrievals. Water Resources Research, 48(W12524), 1-14. (Article publié).
  • Derksen C. + 19 co-authors, including A. Royer. (2012). Variability and Change in the Canadian Cryosphere. Climate Change, 115(1), 59-88. (Article publié).
  • Roy, A., Royer, A., Wigneron, J.-P., A. Langlois, J. Bergeron and P. Cliche. (2012). A simple parameterization for a boreal forest radiative transfer model at microwave frequencies. Remote Sensing of Environment, 124, 371–383. (Article publié).
  • Montpetit B., Royer A., Langlois A., Cliche P., Roy A., Champollion N., Picard G., Domine F. and Obbard R. (2012). New short wave infrared albedo measurements for snow specific surface area retrieval. Journal of Glaciology, 58(211), 941-952. (Article publié).
  • Dupont, F., Royer, A., Langlois, A., Gressent, A., Picard, G., Fily, M., Cliche, P. and Chum, M. (2012). Monitoring the melt season length of the Barnes Ice Cap over the 1979–2010 period using active and passive microwave remote sensing data. Hydrological Processes, 26(17), 2643–2652. (Article publié).
  • Kohn J. and A. Royer. (2012). Microwave brightness temperature as an indicator of near-surface air temperature over snow in Canadian northern regions. Int. J. of Remote Sensing, 33(4), 1126-1138. (Article publié).
  • Brucker L., A. Royer, G. Picard, A. Langlois, M. Fily. (2011). Hourly simulations of the microwave brightness temperature of seasonal snow in Quebec, Canada, using a coupled snow evolution-emission model. Remote Sensing of Environment, 115, 1966-1977. (Article publié).
  • Langlois, A., Royer, A., Dupont, F., Roy, A., Goïta, K. and Picard, G. (2011). Improved corrections of forest effects on passive microwave satellite remote sensing of snow over boreal and subarctic regions. IEEE Transactions on Geoscience and Remote Sensing, 49(10), 3824-3837. (Article publié).
  • Touré A., K. Goïta, A. Royer, E. Kim, M. Durand, S.A. Margulis and Huizhong Lu. (2011). A Case Study of Using a Multi-Layered Thermo-Dynamical Snow Model for Radiance Assimilation. IEEE Transactions on Geoscience and Remote Sensing, 49(8), 2828-2837. (Article publié).
  • Roy A., A. Royer et R. Turcotte. (2011). Analyse de l’identification de la fonte de neige printanière avec QuickSCAT dans le Sud du Québec, Canada. J. Can de Télédétection, 36(2), 89–98. (Article publié).
  • Royer A., K. Goïta, J. Kohn, D. DeSève. (2010). Monitoring Dry, Wet and No- Snow Conditions from Microwave Satellite Observations. IEEE Geos. Remote Sens. Letters, 7(4), 670-674. (Article publié).
  • Langlois, A., Royer, A., Montpetit, B., Picard, G., Brucker, L., Arnaud, L., Goïta, K. and Fily, M. (2010). On the relationship between measured and modeled snow grain morphology using infrared reflectance. Cold Regions Science and Technology, 61, 34–42. (Article publié).
  • Royer A. and S. Poirier. (2010). Surface temperature spatial and temporal variations in Northern America from homogenized satellite SSMR-SSM/I microwave measurements and reanalysis for 1979-2008. J. of Geophysical Research, 115(D08110), (Article publié).
  • Langlois, A., Royer A. and Goïta, K. (2010). Analysis of simulated and spaceborne passive microwave brightness temperatures using in-situ measurements of snow and vegetation properties. Can. J. Remote Sensing, 36, S135–S148. (Article publié).
  • Roy A., A. Royer and R. Turcotte. (2010). Improvement of spring floods simulations with the use of remote sensing snow cover area data in Québec. J. of Hydrology, 390, 35-44. (Article publié).
  • Turcotte, R., Fortier Filion, T.-C., Lacombe, P., Fortin, V., Roy, A. & Royer, A. (2010). Simulation hydrologique des derniers jours de la crue de printemps: le problème de la neige manquante. Hydrological Sciences J., 55(6), 872-882. (Article publié).
  • Kohn J. and A. Royer. (2010). AMSR-E data Inversion for soil temperature estimation under snow cover. Rem. Sens. of Enviro., 114, 2951–2961. (Article publié).
  • Vachon, F., Goïta, K., De Sève, D., Royer, A. (2010). Inversion of a snow emission model calibrated with in situ data for snow water equivalent monitoring. IEEE Transactions on Geoscience and Remote Sensing, 48(1), 59-71. (Article publié).
  • Langlois, A., Brucker, L., Kohn, J., Royer, A., Derksen, C., Cliche, P., Picard, G., Fily, M. and Willemet, J.M. (2009). Simulation of Snow Water Equivalent (SWE) using Thermodynamic Snow Models in Québec, Canada. J. of Hydrometeorology, 10(6), 1447. (Article publié).
  • Toure A. M., Goïta K. Royer A., Mätzler C. and M. Schneebeli. (2009). Near-infrared digital photography to estimate snow correlation length for microwave emission modeling. Applied Optics, 48(1), 1-11. (Article publié).
  • Haboudane, D., F. Bonn et A. Royer. (2008). Evaluation and predictability of terrain susceptibility to hillslope erosion at the regional scale using dem-derived indices and remotely sensed information. Télédétection, 7, 373-391. (Article publié).
  • Royer A., F. Becker et P. Gagnon. (2008). Trente-cinq ans d’observation de la Terre : de la photographie à l’électromagnétométrie,. Télédétection, 7, 65-88. (Article publié).
  • Royer, A., M. Fily, G. Picard. (2008). Évolution des températures de surface des régions polaires et subarctiques par télédétection satellite. Lettre PIGB-PMRC France, 21, (Article publié).

Rapports

  • Blanchet J.-P., A. Royer, F. Chateauneuf and N. O’Neill. (2009). Thin Ice Cloud in Far-Infrared Experiment (TICFIRE), Final Research Report Contract 9F028-07-011/A for new Mission/Payload Concepts, Canadian Space Agency. 100 p.
  • DeLaFontaine J., A. Royer, F. Châteauneuf and J. Hackett. (2009). Platform for the Observation of the Earth and for in-orbit Technology Experiments POETE. Final Technical Report for the Canadian Space Agency, Canada, Contract No. #9F028-07-0111/006/MT. 80 p.

Articles de conférence

  • Hamel J.F., A. St-Amour, J. de Lafontaine, T. J. Lynham, J. M. Johnston, J. Cain, M. Lihou, D. Dufour, A. Royer, M. Flannigan, G. Bonin, S. Gravel and D. Davignon. (2015). The Innovative Microsatellite-Based Canadian Wildland Fire Monitoring System. Proceedings, IAC-15.B1.2.4. (Article accepté).
  • Roy A., A. Royer, B. Montpetit and A. Langlois. (2015). Microwave snow emission modeling of boreal forest. Proceedings, (Article sous presse).
  • (2015). Response of L-Bandbrightness temperatures to Prairie soil and snow properties from surface-basedradiometer measurements. Oral, (Article accepté).
  • Royer A., P. Cliche, N. Marchand, A. Roy, Y. Blanchard, N. O’Neill and D. Crozel. (2014). An Automatic Sky Spectral Thermal Infrared Radiometer (ASSTIR) system. 4th International Symposium on Recent Advances in Quantitative Remote Sensing: RAQRS'IV. (Article publié).
  • Roy A., A. Royer, B. Montpetit and A. Langlois. (2014). Microwave brightness temperature analysis of snow under boreal forest over North Eastern-Canada. Oral, (Article publié).
  • Roy A., A. Royer, B. Montpetit, A. Langlois. (2014). Simulation of snow under boreal forest microwave brightness temperature. IGARSS and 35th Canadian Symp. on Rem. Sensing. (Article publié).
  • André C., C. Ottlé, F. Maignan, A. Royer and M. Fily. (2014). Summer land surface temperature mapping over Arctic from passive microwave microwave sensors. IGARSS and 35th Canadian Symp. on Rem. Sensing. (Article publié).
  • Marchand N., A. Royer, G. Krinner and A. Roy. (2014). Monitoring of the permafrost surface active layer in Quebec and in the Arctic using remote sensing. Geophysical Research Abstracts, v. 16, (Article publié).
  • Roy A., A. Royer, B. Montpetit, A. Langlois, L. Brucker, C. Derksen, A. Mialon, Y. Kerr. (2014). Analysis of SMOS and Aquarius L-band observations of soil freezing and thawing processes over Arctic regions. 13th Specialist Meeting on Microwave Radiometry and Remote Sensing of the Environment (MicroRad 2014). (Article publié).
  • Royer A., A. Roy, A. Langlois, P Toose, C. Derksen and G. Picard. (2014). Retrieval of mean snow grain optical radius from surface-based microwave radiometry. Oral, (Article publié).
  • Papasodoro C., A. Royer, A. Langlois. (2014). Monitoring Baffin Island glaciers melt using RADARSAT-2 Stereo Radargrammetry. Oral, (Article publié).
  • Picard G., L. Arnaud, Q. Libois, N. Champollion, C. Carmagnola, S. Morin, B. Montpetit, A. Royer. (2013). Innovative methods for high-resolution and quantitative snowpack stratigraphy. Oral, (Article publié).
  • Royer A., A. Langlois, P. Cliche, N. Marchand, B. Montpetit, N. Thériault, A. Roy, É. Lefebvre, B. Lesaffre, G. Picard, M. Fily. (2013). Amélioration de la modélisation de l’émission micro-onde de la neige par un suivi saisonnier des propriétés radiométriques et in-situ de la neige à la Baie James. Oral, (Article publié).
  • Royer A., G. Picard, L. Arnaud, M. Fily. (2013). Monitoring snow dunes at Dome C in Antarctica using in-situ and satellite microwave brightness temperatures. Oral, (Article publié).
  • Dupont F., G. Picard, A. Royer, M. Fily, S. Morin and M. Lafaysse. (2013). Climate sensitivity of the Barnes Ice Cap investigated by snow modeling and remote sensing data. Oral, (Article publié).
  • Rodrigue S., A. Royer and R. Fernandes. (2013). Over 30 years of remotely-sensed snow cover duration in relation to the vegetation cover over tundra, taiga and forested areas in Nunavik. Oral, (Article publié).
  • Royer A., A. Roy, B. Montpetit, F. Dupont, L. Brucker, G. Picard and M. Fily. (2013). From optical snow grain radius to microwave grain size parameterization: Simulations and validation analysis. Oral, (Article publié).
  • Langlois, A., Royer, A. and C. Derksen. (2012). Coupling of the snow thermodynamic model SNOWPACK with the Microwave Emission Model for Layered Snowpacks for Snow Water Equivalent (SWE) retrievals. Oral, (Article publié).
  • Roy, A., Royer, A., Montpetit, B. and A. Langlois. (2012). Models parameterization for SWE retrievals from passive microwave over Canadian boreal forest. Oral, (Article publié).
  • Royer, A., A. Langlois, A. Roy, G. Picard and B. Montpetit. (2012). Improvements in snow monitoring using a coupled snow evolution – microwave emission model. Oral, (Article publié).
  • Blanchet JP, A. Royer, F. Châteauneuf, T. Ayash, Y. Blanchard, Y. Bouzid, P. Gauthier, N. O'Neill, O. Pancrati and L. Garand. (2012). Space Observations of Thin Ice Clouds and Water Vapour in Cold Polar Conditions. Oral, (Article publié).
  • Royer, A, Langlois, A., Derksen, C., Roy, A. , Montpetit, B., Bergeron, J., Picard, G., Brucker, L., Goïta, K. (2012). Improvements in snow monitoring using microwave space-based observations. International Polar Year 2012 Conference. (Article publié).
  • Dupont F., G. Picard, A. Royer, M. Fily, A. Roy, N. Champollion. (2012). Modelling the winter microwave emission of the Barnes Ice Cap. MicroRad 2012: 12th Specialist Meeting on Microwave Radiometry and Rem. Sens. of the Enviro. (Article publié).
  • Soliman A., Duguay C., Hachem S. and A. Royer. (2011). ESA's Data User Element (DUE) Permafrost Project: Developing uncertainty indices of operational LST products for the modeling community. American Geophysical Union Fall meeting. (Article publié).
  • Bergeron J. M., A. Royer et R. Turcotte. (2011). Estimation de la couverture nivale à partir d’une combinaison des données MODIS et AMSR-E dans un contexte de prévision des crues printanières au Québec. Oral, (Article publié).
  • Montpetit B., A. Royer, A. Langlois, A. Roy and P. Cliche. (2011). In-situ Near-infrared reflectance measurements for Snow grain size determination. Oral, (Article publié).
  • Royer A., J. Kohn, S. Poirier and M. Fily. (2010). Near-surface air temperature and land-surface temperature retrievals in winter and summer from passive microwave brightness temperature over Northern latitudes. Oral, (Article publié).
  • Brucker L., A. Royer, G. Picard, A. Langlois and M. Fily. (2010). Simulation of time evolution of microwave snow TB using coupled snow evolution-emission models. Oral, (Article publié).
  • Proulx, C., Châteauneuf, F., Wang, M., Royer, A., Hamel, J.-F. and J. de Lafontaine, J. (2009). An uncooled mid wave and thermal infrared payload for fire monitoring. Proc. of SPIE Vol. 7474, 74741Q, (Article publié).
  • Blanchard Y., A. Royer, N. T. O’Neill and J.-P. Blanchet. (2009). Retrieving cloud optical depth and ice particle size using thermal and far infrared radiometry in an Arctic environement. Proc. IGARSS 09, (Article publié).
  • Royer A., Langlois, A. and Goïta, K. (2009). AMSR-E passive microwave brightness temperatures for snow properties retrieval compared with in-situ measurements across a boreal forest to taiga transect in Québec. Oral, (Article publié).

Autres contributions

Gestion d'évènements

  • Organisateur. 15e Congrès de l'Association Québécoise de Télédétection. (Conférence).
  • Président. Association Québécoise de Télédétection. (Association).
  • Organisateur. Eastern Snow Conference. (Conférence).
  • Responsable. Responsable des programmes de 2e et 3e cycle. (Cours).

Activités de collaboration internationale

  • Co-responsable. (2009-2016). Projets de collaborations France-Québec.
  • Membre du comité. (2014). Délégation Québécoise pour la recherche en environnement et changement climatique - Relations Québec-Chine (FQRNT).

Présentations

  • (2013). La neige racontée du ciel: Évolution du couvert nival des régions nordiques par satellite : applications climatiques et hydrologiques. Conférence invitée. Trois-Rivières.
  • (2013). Pouvons-nous manquer d'eau au Québec? Le défi de la gestion de l'eau dans un monde en changement. Conférence Musée Sciences et Nature de Sherbrooke. Sherbrooke.
  • (2013). The research programme at CARTEL, Université de Sherbrooke. Applications to cryospheric studies. Séminaire invitée. Beijing.
  • (2012). Alerte en Arctique: le réchauffement s’accélère!. Conférence invitée au CEGEP de Sherbrooke. Sherbrooke.
  • (2011). Évolution du couvert nival des régions nordiques par satellite : applications climatiques et hydrologiques. Conférence invitée, séminaires du Centre d'études Nordiques. Québec.
  • (2011). Measurements of snow radiometric and microstructure properties. Séminaire invité Thayer School of Engineering at Dartmouth. Hanover.
  • (2010). Vers de nouveaux paysages et écosystèmes arctiques ?. Conférence internationale sur l'Arctique - Enjeux et équations géopolitiques au 21e siècle. Entretiens Jacques Cartier. Lyon.

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