1- Affiliation
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2- Formation et expériences professionnelles :
3-
Domaines d'intérêts :
Modélisation régionale du climat, Changements climatiques, Variabilité et
extrêmes du climat, Modèles couplés atmosphère-océan-glace, Dynamques des
systèmes météorologiques, Climatologie, Météorologie.
4- Publications :
• 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., 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.
• 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.
• Khaliq, N., Ouarda, T.B.M.J., A. St-Hilaire, and P. GACHON, 2006a: Bayesian
change-point analysis of Montreal (Canada) heat spells. International Journal of
climatology (in press).
• Khaliq, N., Ouarda, T.B.M.J., GACHON, P. and B. Bobée, 2006b: Frequency analysis
of a sequence of dependent and/or non-stationary hydro-meteorological observations:
a review. Journal of Hydrology (in press).
• Khaliq, N., P. GACHON, A. St-Hilaire, T.B.M.J. Ouarda, and B. Bobée, 2006c:
Southern Québec (Canada) Summer Heat Spells over the 1941-2000 Period: an Assessment
of Observed Changes. Theoretical and Applied Climatology (in press).
• Nguyen VTV, Nguyen TD, Gachon P. 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.
• 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.
• 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.
• Dibike, Y., P. GACHON, A. St-Hilaire, T.B.M.J. Ouarda, and VTV Nguyen, 2006: Uncertainty
analysis of statistically downscaled temperature and precipitation regimes in northern Canada.
Theoretical and Applied Climatology (submitted).
• GACHON, P., and Dibike, Y., 2006: Temperature change signals in northern Canada: Convergence
of statistical downscaling results using two driving GCMs. International Journal of Climatology,
(submitted).
• Hessami, M., P. GACHON, T.B.M.J. Ouarda, and A. St-Hilaire, 2006: Automated regression-based
Statistical Downscaling Tool. Environmental Modelling & Software (in review).
• Khaliq, N., Ouarda, T.B.M.J., St-Hilaire, A., GACHON, P. and Shushama, L.U., 2006: A stochastic
characterization of occurrences of heat spells in Montreal, Canada. Theoretical and Applied
Climatology (submitted).
Autres contributions
• 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.
• GACHON P., 2000: La modélisation du climat - où en sommes nous ? VertigO - Revue en sciences de
l'environnement, Vol 1 No 2 , September 2000.
http://www.unites.uqam.ca/vertigo/.
• GACHON P., F.J. Saucier and R. Laprise, 2001: Atmosphere-ocean-ice interaction processes in the Gulf
of St. Lawrence: numerical study with a coupled model. Sixth Conference on Polar Meteorology and
Oceanography and the 11th Conference on Interaction of the Sea and Atmosphere, AMS (American
Meteorological Society) meeting, San Diego (California, USA), 14-18 May 2001. Abstract volume,
J1.18, J37-J40.
• 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.
• Goldstein, J., J. Milton, N. Major, P.GACHON, and D. Parishkura, 2004: Climate extremes indices and
their links with future water availability: Case study for summer of 2001, article published in the
proceeding of the 57th Annual Conference of the Canadian Water Resources Association. Montreal, Canada,
June 16-18 2004, 7pp.
• Hessami M., T.J. Ouarda, P. GACHON, A. St-Hilaire, F. Selva and B. Bobée, 2004: Evaluation of statistical
downscaling methods over several regions of eastern Canada, article published in the proceeding of the 57th
Annual Conference of the Canadian Water Resources Association. Montreal, Québec, Canada. June 16-18, 2004,
9 pp.
• Nguyen T., V.T.V. Nguyen, P. GACHON and A. Bourque, 2004: An assessment of statistical downscaling methods
for generating daily precipitation and temperatures extremes in the greater Montreal region, article
published in the proceeding of the 57th Annual Conference of the Canadian Water Resources Association.
Montreal, Québec, Canada. June 16-18, 2004, 10 pp.
• Saucier F.J., S. Senneville, F. Roy, G. Smith, P. GACHON, and D. Caya, 2002: Modeling the ice-ocean
seasonal cycle in Hudson Bay, Foxe Basin and Hudson Strait. Extended Abstract, Small-Scale Sea Ice
Modeling Workshop, Fairbanks, Alaska, USA, 7-9 August 2002, 46 pp.
Workshop et conférences
• GACHON, P. and Dibike, Y., 2006: Climate change and extremes in northern
Canada: Statistical downscaling results using two driving coupled GCMs. Canadian
Meteorological and Oceanographic Society (CMOS) Congress 40th, Toronto,
June 2-5, 2006.
• GACHON, P., Dibike, Y., andf V-T-V Nguyen, 2006: Climate change and extremes
in northern Canada: Statistical downscaling results using two driving coupled
GCMs. Third Annual Meeting of the Asia Oceania Geosciences Society and Second
Conference of the Asia-Pacific Association of Hydrology and Water Resources,
Singapore, 11-14 July 2006.
• GACHON, P., D. Parishkura, N. Gauthier, P. Poudret, A. Cotnoir, M. Badolo,
A. Bokoye, and G. Vigeant, 2005: Variabilité, Extrêmes et Changements climatiques
au Sahel. Colloque Science et Société, Université du Québec à Montréal, Montreal,
Dec. 1, 2005. (invited speaker).
• GACHON, P. 2005: From Modelling to Scenarios of Climate Change, Adapting to
Climate Change in Canada 2005: Understanding Risks and Building Capacity, May 4-7,
2005, Centre Sheraton Montréal Hotel, Montréal, Québec, Special CWN Workshop on
Climate Change and Water. (invited speaker).
• GACHON, P. and B. Bass, 2005: The Canadian Climate Scenarios Network (CCSN),
Adapting to Climate Change in Canada 2005: Understanding Risks and Building
Capacity, May 4-7, 2005, Sheraton Hotel, Montréal, Québec. (invited speaker).
• Nguyen, V-T-V., T-D. Nguyen and P. GACHON, 2004: An evaluation of statistical
downscaling methods for simulating daily precipitation and extreme temperature
series at a local site. 14th Congress of the Asia-Pacific Division of International
Association of Hydraulic Research, December 15-18, 2004, Hongkong, 6 pp.
• Nguyen T., V.T.V. Nguyen, and P. GACHON, 2004 : Statistical Downscaling
Methods for Simulation of Daily Precipitation and Extreme Temperature Series at
a Local Site, First Annual Meeting of the Asia Oceania Geosciences Society and
Second Conference of the Asia-Pacific Association of Hydrology and Water
Resources, Singapore, 5-9 July 2004.
• GACHON P., J. Goldstein, T. Nguyen, D. Chaumont, N. Major, J. Milton and
V.T.V. Nguyen, June 16th, 2004: Development of scenarios of climate variability
and extremes: Precipitation regime, from global to local scale, 57th Annual
Conference of the Canadian Water Resources Association, Montreal, Québec,
Canada, 15-18 June 2004.
• Nguyen T., V.T.V. Nguyen, P. GACHON and A. Bourque, June 1st, 2004 : “An
assessment of statistical downscaling methods for generating daily precipitation
and temperatures extremes in the greater Montreal region”, 38th Congress of the
Canadian Meteorological and Oceanographic Society. Edmonton, Alberta, Canada.
May 31- June 3, 2004.
• Nguyen T., V.T.V. Nguyen, P. GACHON and A. Bourque, June 16th, 2004 : ”An
Assessment of Statistical Downscaling Methods for Generating Daily Precipitation
and Temperatures Extremes in the Greater Montreal Region”. 57th Annual
Conference of the Canadian Water Resources Association. Montréal, Québec,
Canada. June 16-18, 2004.
• Goldstein, J., J. Milton, N. Major, P.GACHON, and D. Parishkura, 2004: Climate
extremes indices and their links with future water availability: Case study for
summer of 2001. 57th Annual Conference of the Canadian Water Resources
Association. Montreal, Canada, June 16-18 2004.
• Hessami M., T.J. Ouarda, P. GACHON, A. St-Hilaire, F. Selva and B. Bobée, 2004
: Evaluation of statistical downscaling methods over several regions of eastern
Canada. 57th Annual Conference of the Canadian Water Resources Association.
Montreal, Québec, Canada. June 16-18, 2004.
• Chaumont D., N. Major, P. GACHON, J. Milton, C. Lin and V. Slonosky, 2004 :
Variabilités et extrêmes climatiques observés au Québec – Dernières décennies-
Analyse par indices climatiques. ACFAS congress, UQAM, Montreal, Québec, Canada.
10-12 May 2004.
• Parishkura, D., J. Goldstein, P. GACHON, and J. Milton, 2004: Développement de
scénarios climatiques à partir de méthodes de mise à l’échelle statistique.
ACFAS congress, 10-12 May 2004, UQAM, Montreal, Québec, Canada.
• Goldstein J., P. GACHON, J. Milton, and D. Parishkura, 2004: Statistical
downscaling models evaluation: A regional case study for Quebec regions, Canada.
European Geosciences Union 1st General Assembly. Nice, France, April 25 - 30
2004.
• GACHON O. and E. Barrow, 2003 : Scenarios of Climate Change for Impacts and
Adaptation. Invited speaker, CMOS Congress 37th, Ottawa, 2-5 June 2003.
• Goldstein J., G. Desrochers, P. GACHON and J. Milton, 2003: Statistical
Downscaling Models Robustness: A regional case study approach for Quebec. CMOS
Congress 37th, Ottawa, 2-5 Juin 2003.
• Saucier F.J., S. Senneville, F. Roy, G. Smith, P. GACHON, and D. Caya, 2002 :
Modeling the ice-ocean seasonal cycle in Hudson Bay, Foxe Basin and Hudson
Strait. Small-Scale Sea Ice Modeling Workshop, Fairbanks (Alaska, USA), 7-9
August 2002.
• GACHON P., and F.J. Saucier, 2002 : The boundary layer structure over cold
oceanic surface simulated by the Canadian Regional Climate Model : example of
Hudson Bay in summertime. The Northern Environment, CMOS Congress 36th, Rimouski
(Québec, Canada), 22-25 May 2002.
• GACHON P., F. J. Saucier and R. Laprise, 2001 : Atmosphere-ocean-ice
interaction processes in the Gulf of St. Lawrence : numerical study with a
coupled model. Sixth Conference on Polar Meteorology and Oceanography and the
11th Conference on Interaction of the Sea and Atmosphere, AMS (American
Meteorological Society) meeting, San Diego (Californie, USA), 14-18 May 2001.
• GACHON P. and F.J. Saucier, 2000 : The effects on monthly regional climate
modelling of coupling of sea ice, ocean and atmosphere versus prescribed surface
oceanic conditions in Canadian Regional Climate Model (CRCM) : example of
January month in the Gulf of St. Lawrence, IGS (International Glaciological
Society) symposium, Fairbanks (Alaska, USA), 19-23 Juin 2000.
• Zwack P., P. GACHON and R. Laprise, 1999 : The influence of sea ice
distribution in northeastern North America on mesoscale atmospheric circulations
: monthly climate and a polar low. Environmental prediction, CMOS congress 33rd,
Montréal (Québec, Canada), 31 Mai - 4 Juin, 1999.
Autres conférences
• GACHON, P., 2005: De la modélisation
climatique globale aux scénarios de changements climatiques, Colloque sur les outils
d’aide à la prévision hydrologique, Ecole Nationale d’Ingénieur de Tunis,
Tunis, Tunisia, March 1st, 2005.Tutorial presentation. (invited speaker).
• GACHON, P., 2005: La variabilité et les changements climatiques tels que
simulés par les MCG en Afrique de l'Ouest, Colloque sur les outils d’aide à
la prévision hydrologique, Ecole Nationale d’Ingénieur de Tunis, Tunis,
Tunisia, March 2nd, 2005. Tutorial presentation. (invited speaker).
• GACHON, P., 2005: From modelling to scenarios of climate change, Climate
Scenarios Workshop, EC-AIRG, Ottawa, Crowne Plaza Hotel, January 31st and
February 1st, 2005.
• GACHON, P., 2005: From Modelling to Scenarios of Climate Change at regional
or local scale, Climate Models and Their Applications: Day of Lecture Series,
March 11, 2005, Holiday Inn, Montreal, Global Environmental and Climate Change
Centre (GEC3) & Ouranos. (invited speaker).
• GACHON, P., 2004: Development of high resolution climate changes scenarios
within the Ouranos context, ACSD, Environment Canada, Downsview, Toronto, Nov.
24, 2004. (invited speaker).
• Chaumont D., N. Major, P. Roy, G. Desrochers, P. GACHON, J. Milton, C. Lin,
V. Slonosky and A. St-Hilaire,
2004 : Variabilités et extrêmes climatiques observés au Québec – Dernières
décennies- Analyse par indices climatiques, 1st Ouranos Symposium, Montreal,
Québec, Canada, June 9-10, 2004.
• Nguyen T., V.T.V. Nguyen and P. GACHON, June 10th, 2004: “An assessment of
statistical downscaling methods for generating daily precipitation and
temperatures extremes in the greater Montreal region”, 1st Ouranos Symposium.
Montreal, Québec, Canada. June 9-10, 2004.
• Goldstein, J., P. GACHON, J. Milton, and D. Parishkura: Statistical
downscaling models evaluation: A regional case study for Quebec regions, Canada.
1st Ouranos Symposium on Climate Change, Montreal, Québec, Canada, June 9-10,
2004.
• Hessami M., T.J. Ouarda, P. GACHON, A. St-Hilaire, F. Selva and B. Bobée, June
9th, 2004 : “Evaluation of statistical downscaling methods over several regions
of eastern Canada”, 1st Ouranos Symposium, Montreal, Québec, Canada, June 9-10,
2004.
• GACHON P., Diane Chaumont, Nicolas Major, Marie Claude Simard, Philippe Roy,
Jennifer Milton, Charles Lin and Vicky Slonosky, Feb. 26th, 2004: Climate
indices development related to variability & extremes analysis in Quebec region,
invited speaker, Environment Canada, Climate Research Branch.
• GACHON P. and E. Barrow, 2003 : Scénarios de changements climatiques : le défi
canadien. Canadian Climate Impacts Scenarios Project, Environnement Canada,
invited speaker, GERAD workshop on Coupling of the dynamic of the climate change
and the economy. May 2nd 2004, Montreal, Canada.
• GACHON P., 2003 : "Les Changements Climatiques au Québec", Conférences
"Environnement", invited speaker, École "Rose des Vents", École primaire de
Pointe au Père, Commission scolaire des Phares, Pointe au Père, Qc, January 23,
2003.
• Gachon P. and V. Slonosky, 2003 : Key atmospheric and oceanic factors
responsible for climate variability and extreme events in Canada, invited
speaker, National Workshop: Development of Scenarios of Climate Variability and
Extremes: Current Status and Next Steps, Climate Impacts Scenarios Project,
Environnement Canada, Delta Ocean Pointe Hotel, Victoria, BC, October 16-17,
2003.
• GACHON P., 2002 : "Les Changements Climatiques", Conférences "Environnement et
Eau", invited speaker, École Arc-en-ciel, École primaire de Montréal, November
22, 2002.
• GACHON P., 2002 : "Les changements climatiques et leurs conséquences sur la
ressource hydrique au Québec" (Climatic changes and their roles on hydrologic
resources in Québec), invited speaker, Conseil de bassin-Rivière Rimouski, CEGEP
de Rimouski, November 19, 2002.
• GACHON P., 2002 : Les changements climatiques et le Saint-Laurent marin (Climatic
changes and the marine St. Lawrence), invited speaker, Day of teachers, The
Northern Environment, CMOS Congress 36th, Rimouski (Québec, Canada), May 22-25,
2002.
• GACHON, P. and F. J. Saucier, 2000. The effects of coupling between the ocean,
sea ice and atmosphere in the Gulf of St. Lawrence on the regional atmospheric
circulation, simulated by the Canadian Regional Climate Model (CRCM). Arctic
Regional Climate Model Intercomparison Project (ARCMIP) meeting, Fairbanks
(Alaska, USA), September 12-15, 2000.
• GACHON P., 1999 : The effects of sea-ice distribution on regional climate :
example of Hudson Bay sector in winter, invited speaker, University de Fribourg,
Department of Geography, Fribourg (Switzerland).
• GACHON P., P. Zwack and R. Laprise, 1999 : The effects of sea-ice distribution
on mesoscale cyclone development and on regional climate, 7th Annual Workshop on
Regional Climate Modelling, “Atmospheric & Oceanic processes in the context of
regional climate modelling”, Estérel (Québec, Canada), May 23-26, 1999.
• GACHON P., 1998 : Sensitivity experiments and diagnostic analysis of the
influence of sea-ice distribution on cyclone behaviour, invited speaker,
University de Stockholm, Department of meteorology, Stockholm (Sweden).
Autres contributions
• Choux M., 2005: Degree Master of Engineering, Department of Civil Engineering
and Applied Mechanics, McGill University. Title of Thesis: “Development of new
predictor variables for the statistical downscaling of precipitation” (Dec. 2005),
co-supervision with Pr. VTV Nguyen & P. GACHON.
• GACHON, P., A. St-Hilaire, T. Ouarda, VTV Nguyen, C. Lin, J. Milton, D. Chaumont,
J. Goldstein, M. Hessami, T.D. Nguyen, F. Selva, M. Nadeau, P. Roy, D. Parishkura,
N. Major, M. Choux & A. Bourque, 2005: A first evaluation of the strength and
weaknesses of statistical downscaling methods for simulating extremes over various
regions of eastern Canada. Sub-component, Climate Change Action Fund (CCAF),
Environment Canada, Final report, Montréal, Québec, Canada, 209 pp.
• Tramblay Y., P. GACHON, A. St-Hilaire, et D. Chaumont, 2005: Variabilité et extrêmes
de température et de précipitation entre 1941 et 2000: le cas du golfe du fleuve
Saint Laurent. INRS-ETE, rapport de recherche R-805, 52 pages et 2 Annexes
(ISBN:2-89146-218-1).
Thèse
• GACHON P., 1999 : The effects of the sea-ice distribution on the mesoscale
cyclone development and regional climate, PhD’s Thesis (thesis in climate
numerical modeling), University of Québec at Montréal (UQAM), Montréal (Québec,
Canada), 352 pp.