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AFFILIATIONS

Professeur adjoint, centre pour l’Étude et la Simulation du Climat à l’Échelle Régionale, Département des sciences de la terre et de l’atmosphère, Université du Québec à Montréal, Montréal (Québec).

Professeur invité, Institut National de la Recherche Scientifique, Eau­Terre­Environnement, Université du Québec, Québec

PRIX / ÉTUDES

Doctorat en sciences de l'environnement, Université du Québec à Montréal (thèse sur la modélisation numérique du climat régional et les analyses diagnostiques, 1999); bourses de recherche doctorale de Pétro-Canada et de l'Université du Québec à Montréal.

Post-doctorat : Bourse de recherche scientifique dans les laboratoires du gouvernement canadien (programme du CRSNG), Institut Maurice-Lamontagne, ministère des Pêches et des Océans, Mont-Joli, Québec (1999-2002).

 

Philippe Gachon

Chercheur scientifique - Recherche sur les scénarios climatiques et les méthodes de régionalisation

RECHERCHE / S-T ACTUELLE - Contribuer au mandat d'Environnement Canada (EC) qui consiste à améliorer les renseignements sur le climat futur, ses extrêmes et ses répercussions afin de servir de base à la prise de décisions sur l’adaptation au Canada

  • Élaboration de scénarios climatiques à haute résolution
  • Méthodes de Mise à l’Échelle Statistiques
  • Analyse des extrêmes et des tendances : température (canicules), précipitation (fréquence, intensité et durée des événements de précipitation abondante), vents et variables hydrologiques (faible ou fort débit)
  • Évaluation des modèles climatiques régionaux : reconstitution des extrêmes observés et événements climatiques extrêmes projetés au Canada
  • Dynamique de l'atmosphère à grande et à fine échelle et sa relation avec la variabilité et les changements climatiques régionaux

ACTIVITÉS PROFESSIONNELLES / INTÉRÊTS

Philippe Gachon est chercheur scientifique au centre canadien de la modélisation et de l'analyse climatique et professeur adjoint à l'Université du Québec à Montréal (UQÀM, centre ESCER). Philippe Gachon a obtenu son doctorat en 1999 en Sciences de l’Environnement à l'UQÀM (projet de thèse en modélisation régionale du climat et en analyse diagnostique des tempêtes), suivi d'un stage post-doctoral à l'Institut Maurice-Lamontagne (Ministère Pêches et Océans Canada) sur le problème du couplage océan-glace-atmosphère entre 1999 et 2002. Il est actuellement le co-responsable, avec des collègues de l'INRS-ETE (Québec) et à l'étranger, du projet international FACE qui vise à soutenir l'adaptation des populations vulnérables à la variabilité et au changement du climat au Canada, au Maroc et au Niger. Son expertise englobe la réduction d'échelle statistique et dynamique, l’analyse des tempêtes et des extrêmes, et le développement de scénarios climatiques à l'échelle régionale. Il travaille en étroite collaboration pour développer des outils afin d’aider à améliorer la santé humaine, la durabilité et la résilience des systèmes naturels et humains, et faciliter le transfert, l’intégration et l’application des informations sur le changement du climat afin de développer les connaissances et les stratégies en adaptation.

PRINCIPALES PUBLICATIONS

2014

Benyahya, L., P. Gachon, A. St-Hilaire and R. Laprise, 2014: Frequency analysis of seasonal extreme precipitation in southern Quebec (Canada): an evaluation of regional climate model with respect to gridded observed datasets, Hydrology Research, 45.1, 115-133, DOI:10.2166/nh.2013.066.

Roy, P., P. Gachon and R. Laprise, 2014: Sensitivity of seasonal precipitation extremes to model configuration of the Canadian Regional Climate Model over eastern Canada using historical simulations, Climate Dynamics (accepted, January 22nd, 2014) DOI: 10.1007/s00382-014-2066-z.

2013

Bonsal, B. R., R. Aider, P. Gachon, and S. Lapp, 2013: An Assessment of Canadian Prairie Drought: Past, Present, and Future, Climate Dynamics, 41, 501-516, DOI 10.1007/s00382-012-1422-0.

Eum, H.-I., P. Gachon, and R. Laprise, 2013: Developing a likely climate scenario from multiple regional climate model simulations with an optimal weighting factor, Climate Dynamics (accepted, Dec. 7th, 2013), DOI 10.1007/s00382-013-2021-4.

Gaitan, C., W. Hsieh, A. Cannon and P. Gachon, 2013: Validation of linear and nonlinear downscaling methods in terms of weather and climate indices: Surface temperature in Ontario and Quebec, Atmosphere-Ocean.

Jeong, D.I., A. St-Hilaire, T.B.M.J. Ouarda, and P. Gachon, 2013: Projection of future daily precipitation series and extreme events by using a multi-site statistical downscaling model over the great Montréal area, Québec, Canada, Hydrology Research, 44.1, 147-168, DOI: 10.2166/nh.2012.183.

Jeong, D.I., A. St-Hilaire, T.B.M.J. Ouarda, and P. Gachon, 2013: Projection of Multi-site Daily Temperatures over the Montréal Area, Canada, Climate Research, 56, 261-280.

Khalili, M., V.T.V Nguyen, and P. Gachon, 2013: A statistical approach to multi-site downscaling of daily extreme temperature series, International Journal of Climatology 33: 15–32, DOI: 10.1002/joc.3402.

Sarr M.A., M. Zoromé, O. Seidou, C. Robin Bryant, and P. Gachon, 2013: Recent trends in selected extreme precipitation indices in Senegal-A change point approach, Journal of Hydrology, 505, 326-334, DOI: 10.1016/j.jhydrol.2013.09.032.

2012

Eum, H.-I., P. Gachon, R. Laprise and T. Ouarda, 2012: Evaluation of regional climate model simulations versus gridded observed and regional reanalysis products using a combined weighting scheme, Climate Dynamics 38, Numbers 7-8, 1433-1457, DOI 10.1007/s00382-011-1149.

Jeong, D.I., A. St-Hilaire, T.B.M.J. Ouarda, and P. Gachon, 2012a: Comparison of transfer functions in a regression-based statistical downscaling model for daily temperature and precipitation over Canada, Stochastic Environmental Research & Risk Assessment, 26, 633-653, DOI: 10.1007/s00477-011-0523-3.

Jeong, D.I., A. St-Hilaire, T.B.M.J. Ouarda, and P. Gachon, 2012b: A multivariate multi-site statistical downscaling model for daily maximum and minimum temperatures, Climate Research, 54, 129–148, DOI: 10.3354/cr01106.

Jeong, D.I., A. St-Hilaire, T.B.M.J. Ouarda, and P. Gachon, 2012c: Multisite statistical downscaling model for daily precipitation combined by multivariate multiple linear regression and stochastic weather generator, Climatic Change, 114:567–591, DOI: 10.1007/s10584-012-0451-3.

Jeong, D.I., A. St-Hilaire, T.B.M.J. Ouarda, and P. Gachon, 2012d: CGCM3 predictors used for daily temperature and precipitation downscaling in southern Québec, Canada, Theoretical and Applied Climatology, 107 (3), 389-406, DOI: 10.1007/s00704-011-0490-0.

Jeong, D.I., A. St-Hilaire, T.B.M.J. Ouarda, and P. Gachon, 2012e: A Multi-site Statistical Downscaling Model for Daily Precipitation using Global Scale GCM Precipitation Outputs, International Journal of Climatology (in press), DOI: 10.1002/joc.3598.

Roy, P., P. Gachon and R. Laprise, 2012: Assessment of summer extremes and climate variability over the north-east of North America as simulated by the Canadian Regional Climate Model, International Journal of Climatology 32: 1615–1627, DOI: 10.1002/joc.2382.

2011

Gachon, P., A.E. Harding, M. Radojevic, E. Pison and V-T-V. Nguyen, 2011: Downscaling Global and Regional Climate Models. Environment Canada, University of Toronto at Scarborough (CL@UT), Climate Impacts and Adaptation Science 2010, Issue 1: Planned Adaptation to Climate Change, ISSN 1927-7709, 19-49.

Hanesiak, J.M., R.E. Stewart, B.R. Bonsal, P. Harder, R. Lawford, R. Aider, B.D. Amiro, E. Atallah, A.G. Barr, T.A. Black, P. Bullock, J.C. Brimelow, R. Brown, H. Carmichael, C. Derksen, L.B. Flanagan, P. Gachon, H. Greene, J. Gyakum, W. Henson, T. Hogg, B. Kochtubajda, H. Leighton, C. Lin, Y. Luo, J.H. McCaughey, A. Meinert, A. Shabbar, K. Snelgrove, K. Szeto, A. Trishchenko, G. van der Kamp, S. Wang, L. Wen, E. Wheaton, C. Wielki, Y. Yang, S. Yirdaw, and T. Zha, 2011: Characterization and summary of the 1999-2005 Canadian Prairie drought, Atmosphere-Ocean 49, Issue 4, 421-452, DOI:10.1080/07055900.2011.626757.

Harding, A.E., P. Gachon and V-T-V. Nguyen, 2011: Replication of atmospheric oscillations, and their patterns, in predictors derived from Atmosphere–Ocean Global Climate Model output, International Journal of Climatology, 31: 1841–1847, DOI: 10.1002/joc.2191.

Khaliq, M.N., Ouarda, T.B.M.J., Gachon, P., and Sushama, L., 2011: Stochastic modeling of hot weather spells and their characteristics. Climate Research, 47, 187–199.

2010

Khaliq, M.N., and Gachon, P., 2010: Pacific Decadal Oscillation climate variability and temporal pattern of winter flows in northwestern North America. Journal of Hydrometeorology 11, 917–933.

2009

Khaliq MN, Ouarda TBMJ, Gachon P., Sushama, L, St-Hilaire A. 2009a: Identification of hydrological trends in the presence of short-term serial and cross correlations: review of the selected methods and their application to annual flow regimes of Canadian rivers. Journal of Hydrology 368, 117–130.

Khaliq MN, Ouarda TBMJ, and Gachon P. 2009b: Identification of temporal trends in annual and seasonal low flows occurring in Canadian rivers: the effect of short- and long-term persistence. Journal of Hydrology, 369, 183–197, doi:10.1016/j.jhydrol.2009.02.045.

2008

Dibike, Y., P. Gachon, A. St-Hilaire, T. Ouarda, and VTV Nguyen, 2008: Uncertainty analysis of statistically downscaled temperature and precipitation regimes in northern Canada. Theoretical and Applied Climatology, 91, 149–170.

Hessami, M., P. Gachon, T. Ouarda, and A. St-Hilaire, 2008: Automated regression-based Statistical Downscaling Tool. Environmental Modelling & Software, 23, 813-834.

Hundecha, Y., A. St-Hilaire, T. Ouarda, S. El Adlouni, and P. Gachon, 2008: A non-stationary extreme value analysis for the assessment of changes in extreme wind speed over the Gulf of St-Lawrence, Canada. Journal of Applied Meteorology and Climatology, 47(11), 2745 – 2759, doi: 10.1175/2008JAMC1665.1.

Khaliq MN, Ouarda TBMJ, Gachon P., Sushama L. 2008: Temporal evolution of low flow regimes in Canadian rivers. Water Resources Research 44, W08436, doi:10.1029/2007WR006132.

Quilbé R., A.N. Rousseau, J-S. Moquet, N. Bao Trinh, Y. Dibike, P. Gachon, and D. Chaumont, 2008: Assessing the Effect of Climate Change on River Flow Using General Circulation Models and Hydrological Modelling: Application to the Chaudière River, Québec, Canada. Canadian Water Resources Journal 33, 73-94.

2007

Gachon, P., and Y. Dibike, 2007: Temperature change signals in northern Canada: Convergence of statistical downscaling results using two driving GCMs. International Journal of Climatology 27, 1623-1641.

Gachon, P., 2007: Uncertainties in regional climate change scenarios. Expert Symposium on Climate Change: Modelling, Impacts, and Adaptations, Ed. S.Y. Liong, K.K. Phoon, and D.G. Toll, National University of Singapore, Singapore,17-19 December 2007, 45-54, ISBN:978-81-904438-3-8.

Khaliq, N., P. Gachon, A. St-Hilaire, T. Ouarda, and B. Bobée, 2007a: Southern Québec (Canada) Summer Heat Spells over the 1941-2000 Period: an Assessment of Observed Changes. Theoretical and Applied Climatology 88, 83–101.

Khaliq, N., T. Ouarda, A. St-Hilaire, and P. Gachon, 2007b: Bayesian change-point analysis of heat spell occurrences in Montreal, Canada. International Journal of climatology 27, 805-818.

Nguyen, TD., VTV. Nguyen, and P. Gachon, 2007: A spatial-temporal downscaling approach for construction of intensity-duration-frequency curves in consideration of GCM-based climate change scenarios, in Advances in Geosciences, Vol. 6: Hydrological Sciences”, N. Park et al. (Eds.), World Scientific Publishing Company, pp. 11-21.

2006

Khaliq, N., T. Ouarda, P. Gachon, and B. Bobée, 2006: Frequency analysis of a sequence of dependent and/or non-stationary hydro-meteorological observations: a review. Journal of Hydrology 329, 534–552.

Nguyen, VTV., TD. Nguyen, and P. Gachon, 2006: On the linkage of large-scale climate variability with local characteristics of daily precipitation and temperature extremes: an evaluation of statistical downscaling methods. Advances in Geosciences (WSPC/SPI-B368) 4(16): 1-9.

2004

Barrow, E., B. Maxwell and P. Gachon, 2004 : Climate Variability and Change in Canada: Past, Present and Future, Climate Change Impacts Scenarios Project, National Report, Environment Canada, Meteorological Service of Canada, Adaptation Impacts Research Group, Atmospheric and Climate Sciences Directorate publication, Canada, 114 pp, ISBN: 0-662-38497-0.

Saucier, F.J., S. Senneville, S. Prinsenberg, F. Roy, P. Gachon, D. Caya, and R. Laprise, 2004: Modeling the ice-ocean seasonal cycle in Hudson Bay, Foxe Basin and Hudson Strait, Canada. Climate Dynamics, 23, 303-326.

2003

Gachon, P., R. Laprise, P. Zwack and F.J. Saucier, 2003: The effects of interactions between surface forcings in the development of a model-simulated polar low in Hudson Bay. Tellus A 55 (1), 61-87.

Gachon, P., and F.J. Saucier, 2003 : La modélisation du climat dans les mers intérieures du Canada : Baie d'Hudson et Golfe du Saint-Laurent. Naturaliste Canadien, vol. 127, n°2, 117-122.

2002-2000

Gachon, P., F.J. Saucier, and R. Laprise, 2002: Evaluation of summer-time near-surface temperature and wind fields over Hudson Bay in a regional atmospheric model. in Research activities in atmospheric and oceanic modelling, WMO-TD No. 1105, World Climate Research Program, CAS/JSC Working Group on Numerical Experimentation, Report n° 32, 5.13-5.14.

Senneville, S., F.J. Saucier, P. Gachon, R. Laprise, and D. Caya, 2002: Development of a coupled ice-ocean model of Hudson Bay. in Research activities in atmospheric and oceanic modelling, WMO-TD, No. 1105, World Climate Research Program, CAS/JSC Working Group on Numerical Experimentation, Report n° 32, 8.23-8.24.

Gachon, P. and F.J. Saucier, 2001: Sensitivity study of the effects of oceanic conditions in the Gulf of St. Lawrence (Québec, Canada) on wintertime atmospheric circulation, in Research activities in atmospheric and oceanic modelling, WMO-TD, Working Group on Numerical Experimentation (WGNE), Report n°31.

Gachon, P., F.J. Saucier, M. Faucher and R. Laprise, 2001: Development of an atmosphere-ocean-sea ice coupled regional model in the Gulf of St. Lawrence, in Research activities in atmospheric and oceanic modelling, WMO-TD, Working Group on Numerical Experimentation (WGNE), Report n°31.

Gachon, P., 2000 : La modélisation du climat - où en sommes nous ? VertigO - Revue en sciences de l'environnement, Vol 1 No 2, Septembre 2000.

Catégories d'expertises associées à cet expert des sciences et technologies :

Climat
     Changements et processus climatiques
          Adaptation et incidence
          Effets
          Interactions entre la surface des terres et l’atmosphère
          Prévision
          Temps violent
          Tendances et variabilité
     Modélisation climatique
          Circulation
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