Mes domaines d’étude sont principalement la géophysique et la télédétection pour le suivi des risques naturels dans un environnement de changement. Je me concentre principalement sur les régions polaires où mes études tentent d’établir les liens complexes entre l’activité humaine, les changements climatiques et les risques naturels qui y sont associés. Je tente de voir l’évolution de ces risques à long terme à l’aide de modèles en intégrant des mesures terrain.

• Formation
• Domaines d’enseignement
• Recherches actuelles
• Publications récentes

• Postdoctorat (géographie physique et télédétection), Université de Sherbrooke, Québec, Canada (2010)
• Ph. D. (géophysique), University of Manitoba, Canada (2007)
• M. Sc. (télédétection), Université de Sherbrooke, Québec, Canada (2003)
• B. Sc. (géographie physique et télédétection), Université de Sherbrooke, Québec, Canada (2001)

• Télédétection optique et radar
• Géomatique et géorisques
• Géomatique et changements climatiques
• La neige

• Les effets des changements climatiques sur le pergélisol, le couvert nival et la toundra, lacs et rivières et géosystèmes dans le but de trouver des solutions et stratégies d’adaptation pour les communautés nordiques.
• La quantification des incertitudes relatives à la détermination de l’équivalent en eau de la neige liées à la végétation et la topographie, et l’exploration du besoin de mesures en continu et en temps réel.
• La promotion et le développement des méthodes innovatrices de mesures du manteau neigeux.

• Larue F., A. Royer, D. De Sève, A. Langlois, A. Roy and L. Brucker (2017). Validation of GlobSnow-2 snow water equivalent over Eastern Canada. Remote Sensing of Environment, 194 : 264-277.
• Langlois, A., C.-A. Johnson, B. Montpetit, A. Royer, E.A. Blukacz-Richards, E. Neave, C. Dolant, A. Roy, G. Arhonditsis, D.-K. Kime, S. Kaluskar, L. Brucker (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.
• Roy, A., Royer, A., St-Jean-Rondeau, O., Montpetit, B., Picard, G., Marchand, N., and Langlois, A. (2016) Microwave snow emission modeling uncertainties in boreal and subarctic environments. The Cryosphere, 10 : 623-638.
• Busseau, B.-C., Royer, A., Langlois, A., Barrère, M. And Domine, F. (2015) Analysis of the Interactions between Snow and Vegetation over low Arctic – Subarctic transition (North Eastern Canada). Physical Geography, 38:2, 159-175.
• Papasodoro, C., Berthier, E., Royer, A., Zdanowic z, C. And Langlois, A. (2015) Area, elevation and mass changes of the two southernmost ice caps of the Canadian Arctic Archipelagobetween 1952 and 2014. The Cryosphere, 9 : 1535-1550.
• Dolant, C., Langlois, A., Montpetit, B., Brucker, L., Roy, A., and Royer, A. (2015) Development of a rain-on-snow detection algorithm using passive microwave radiometry. Hydrological Processes. 30, 18 : 3184–3196
• Roy A. Royer A., Derksen, C., Brucker, L., Langlois, A., Mialond, A., and Kerr, Y. (2015) Evaluation of Spaceborne L-band Radiometer Measurements for Terrestrial Freeze/Thaw Retrievals in Canada. IEEE selected topics in applied earth observations and remote sensing, 8(9) : 4442-4459.
• Dupont, F., Picard, G., Royer, A., Fily, M., Roy, A., Langlois, A. and 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, Oct. 2014 doi: 10.1109/TGRS.2014.2299829
• 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, doi: http://dx.doi.org/10.1175/JHM-D-13-055.1
• 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, doi:10.1002/2013JF003017.
• Roy, A., Royer, A., Montpetit, B., Bartlett, P.A., and Langlois, A. (2013)  Snow specific surface area simulation using the one-layer snow model in the Canadian LAnd Surface Scheme (CLASS). The Cryosphere, 7, 961-975, doi:10.5194/tc-7-961-2013
• Langlois, A., Royer, A., Derksen, C., Montpetit, B., Dupont, F., Goïta, K. (2012) Coupling the snow thermodynamic model SNOWPACK with the microwave emission model of layered snowpacks for subarctic and arctic snow water equivalent retrievals. Water Resources Research, vol. 48, W12524, December 2012.
• Derksen, C., Smith, S. L., Sharp, M., Brown, L., Howell, S., Copland, L., Muelle, D. R., Gauthier, Y., Fletcher, C., Tivy, A., Bernier, M., Bourgeois, J., Brown, R., Burn, C. R., Duguay, C., Kushner, P., Langlois, A., Lewkowicz, A. G., Royer, A. and Walker, A. (2012) Varianility and change in the canadian cryosphere, Climatic Change, DOI: 10.1007/s10584-012-0470-0.
• Derksen, C., Toose, P., Lemmetyinen, J., Pulliainen, J., Langlois, A., Rutter, N. and Fuller, M.C. (2012) Evaluation of passive microwave brightness temperature simulations and snow water equivalent retrievals through a winter season, Remote Sensing of Environment, 117, 236-248.
• 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. Hydrol. Process. doi: 10.1002/hyp.9382
• Dupont, F., Picard, G., Royer, A., Fily, M., Langlois, A., Roy, A., and Champollion, N. (2012) Modeling the microwave emission of bubbly ice; Applications to blue ice and superimposed ice in the Antarctic and Arctic, IEEE Transactions on Geosciences and Remote Sensing, Submitted, TGRS_2012-01104.
• Montpetit B., Royer, A., Roy, A., Langlois, A. and Derksen, C. (2012) Snow microwave emission modeling of ice lenses within the snowpack using the Microwave Emission Model for Layered Snowpacks (MEMLS), Hydrological Processes.
• Montpetit B., Royer A., Langlois A., Cliche P., Roy A., Champollion N., Picard G., Domine F., Obbard R. (2012) New short wave infrared albedo measurements for snow specific surface area retrieval, Journal of Glaciology, vol. 58, no. 211, doi: 10.3189/2012JoG11j248.
• Roy, A., Picard, G., Royer, A., Montpetit, B., Dupont, F., Langlois, A., and Derksen, C. (2012) Snow brightness temperature simulations driven by measurements of the specific surface area of snow grains, IEEE Transactions on Geoscience and Remote Sensing, Accepted, TGRS-2012-00591.
• Roy, A., Royer, A., Wigneron, J.-P., Langlois, A., Bergeron, J., Cliche, P. (2012) A simple parameterization for a boreal forest radiative transfer model at microwave frequencies. Remote Sensing of Environment, 124, doi: 10.1016/j.rse.2012.05.020.

• Rutter, N., Sandells, M., Derksen, C., Royer, A., Lemmetyinen, J., Toose, P., Montpetit, B., Langlois, A., and Pulliainen, J. (2012). Snow stratigraphic heterogeneity within ground-based passive microwave radiometer footprints: implications for emission modelling. Journal of Geophysical Research.
• Ching, Y.,Langlois, A. and Barber, D.G. (2011) On the metamorphic processes controlling snow evolution over Arctic first-year sea ice in spring. Part I: Intercomparison of Observations, Submitted to Journal of Geophysical Research, December 2011
• Dupont, F., Royer, A., Langlois, A., Gressent, A., Picard, G., Fily, M., Cliche, P. And Chum, M. (2011) Monitoring of Barnes ice cap seasonal melt duration over the last 30 years using active and passive microwave remote sensing data, Hydrological Processes, Submitted, August 2011.
• Derksen, C., Toose, P., Lemmetyinen, J., Pulliainen, J., Langlois, A. And Rutter, N. (2011)  Evaluation of passive microwave brightness temperature simulations and snow water equivalent retrievals through a winter season, Remote Sensing of Environment, Submitted, April 2011. 
• 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, no. 10, 3824-3837.
• Brucker, L., Royer, A., Picard, G., Langlois, A. and Fily, M. (2011) Hourly simulations of seasonal snow microwave brightness temperature using coupled snow evolution-emission models in Québec, Canada. Remote Sensing of Environment, 115, 115, pp. 1966-1977.
• Scharien, R.K., Geldsetzer, T., Barber, D.G., Yackel, J.J., and Langlois, A. (2010) Physical, dielectric, and C-band microwave scattering properties of first-year sea ice during advanced melt, Journal of Geophysical Research, Vol. 115, C12026, doi: 10.1029/2010JC006257
• Langlois, A., Royer, A., Montpetit, B., Picard, G., Brucker, L., Arnaud L., Harvey-Collard, P., Fily, M. and Goïta, K. (2010) On the relationship between snow grain morphology and in-situ near infrared calibrated reflectance photographs. Cold Regions Science and Technology, 61, pp. 34-42. doi:10.1016/j.coldregions.2010.01.004
• 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, Canadian IPY Special Issue of Canadian Journal of Remote Sensing, Vol. 36, No. 1, pp. 135-148.
• Langlois, A., Brucker, L., Kohn, J., Royer, A., Derksen, C., Cliche, P., Picard, G., Fily, M. and Willemet, J.M. (2009)  Regional Retrieval of Snow Water Equivalent (SWE) using Thermodynamic Snow Models in Québec, Canada. Journal of Hydrometeorology, Vol. 10, No. 6, 1447-1463.
• Geldsetzer, T., Langlois, A. and Yackel, J.  (2009)  Dielectric properties of brine-wetted snow on first-year sea ice.  Cold Regions Science and Technology, 58, 47-56.
• Isleifson, D., Langlois, A., Barber, D.G. and Shafai, L.  (2009)  C-Band Scatterometer Measurement of Multiyear Sea Ice before fall freeze-up in the Canadian Arctic.  IEEE Transactions on Geoscience and Remote Sensing. 47(6), 1651-1661. 
• Langlois, A., Brucker, L., Kohn, J., Royer, A., Derksen, C., Cliche, P., Picard, G., Willemet, J.M., and Fily, M. (2009). Simulation of Snow Water Equivalent (SWE) using Thermodynamic Snow Models in Québec, Canada. Journal of Hydrometeorology, 10(6), 1447-1462 DOI: 10.1175/2009JHM1154.1
• Langlois, A., Fisico, T., Barber, D.G. and Papakyriakou, T.N.  (2008)  The response of snow thermophysical processes to the passage of a polar low-pressure system and its impact on in-situ passive microwave data: A case study.  Journal of Geophysical Research, 113, C03S04, doi:10.1029/2007JC004197. 
• Langlois, A., Scharien, R., Geldsetzer T., Iacozza J., Barber D.G. and Yackel J. (2008)  Estimation of Snow Water Equivalent over First-Year Sea Ice using AMSR-E and Surface Observations.  Remote Sensing of Environment, 112, 3656-3667. 
• Langlois, A. and Barber, D.G.  (2008)  Advances in seasonal snow water equivalent (SWE) retrieval using in-situ passive microwave measurements over first-year sea ice.  International Journal of Remote Sensing, 29, 16, 4781-4802. 
• Galley, R.J., Trachtenberg, M., Langlois, A., Barber D.G. and Shafai, L. (2008)  Observations of geophysical and dielectric properties and ground penetrating radar signatures for discrimination of snow, sea ice and freshwater ice thickness.  Cold Regions Science and Technology, 57, 29-38. 
• Langlois, A. and Barber, D.G.  (2007)  Passive Microwave Remote Sensing of Seasonal Snow Covered Sea Ice.  Progress in Physical Geography, 31(6), 539-573, doi: 10.1177/0309133307087082. 
• Langlois, A., Barber, D.G., and Hwang, B.J.  (2007)  Development of a snow water equivalent algorithm using passive microwave data over first-year sea ice. Remote Sensing of Environment, vol. 106/1, p.75-88, doi:10.1016/j.rse.2006.07.018. 
• Langlois, A., Mundy, C.J., Barber, D.G.  (2007)  Overwintering Evolution of Geophysical and Electrical Properties of Snow Cover over First-Year Sea Ice. Hydrological Processes, vol. 21, 6, p. 705-716, doi: 10.1002/hyp.6407.

Autres publications