Ph.D., Atmospheric and Oceanic Sciences, McGill University


Alain Caya

Physical Scientist - Assimilation of Satellite Data and Meteorology


Development and operational implementation of satellite data assimilation techniques and meteorology to improve the computer models used for weather and environmental forecasting. Research on ice to support safe navigation in the Arctic and Atlantic oceans and inland waters, leading to improved meteorological forecasting

  • Development of a variational data assimilation system for sea ice
  • Estimation of forecasting error covariance
  • Data assimilation in coupled atmosphere-ice-ocean models
  • Satellite data assimilation for sea ice analysis


Review of scientific journal articles (e.g., Bulletin of the American Meteorological Society)

Organization of conference sessions (e.g., co-chair of the Data Assimilation session at the 2006 IEEE International Geoscience and Remote Sensing Symposium & 27th Canadian Symposium on Remote Sensing)


Buehner, M., A. Caya, L. Pogson, T. Carrieres and P. Pestieau, 2013: A New Environment Canada Regional Ice Analysis System, Atmosphere-Ocean, 51, 18-34.

Caya, A., M. Buehner, and T. Carrieres, 2010: Analysis and Forecasting of Sea Ice Conditions with Three-Dimensional Variational Data Assimilation and a Coupled Ice-Ocean Model, J. Atmos. Oceanic Technol., 27, 353-369.

Liu, H., J. Anderson, Y. Kuo, C. Snyder and A. Caya. 2008. Evaluation of a Non-Local Quasi-Phase Observation Operator in Assimilation of CHAMP Radio Occultation Refractivity with WRF. Mon. Wea. Rev. 136:242-256.

Caya, A., M. Buehner, M. Shokr and T. Carrieres. 2006. A first attempt of data assimilation for operational sea ice monitoring in Canada. 2006 IEEE International Geoscience And Remote Sensing Symposium & 27th Canadian Symposium on Remote Sensing, Denver, Colorado.

Caya, A., J. Sun and C. Snyder. 2005. A comparison between the 4D-Var and the ensemble Kalman filter techniques for radar data assimilation. Mon. Wea. Rev.133: 3081-3094.

Caya, A., N. A. Crook and J. Sun. 2003. The use of an evaporation scheme in a boundary-layer model for real-time 4D-Var radar data assimilation and forecasting of convergence lines. Available on CD from American Meteorological Society in Preprints from the 31st International Conference on Radar Meteorology".

Caya, A., S. Laroche, I. Zawadzki and T. Montmerle. 2002. Using Single-Doppler Data to Obtain a Mesoscale Environmental Field. J. Atmos. Oceanic Technol. 19: 21-36.

Caya, A., R. Laprise and P. Zwack. 1998. Consequences of Using the Splitting Method for Implementing Physical Forcings in a Semi-Implicit Semi-Lagrangian Model. Mon. Wea. Rev. 126: 1707–1713.

Expertise Categories associated with this S&T Expert:

          Data assimilation
          Sea ice modelling
Weather & Meteorology
     Atmospheric Modelling
          Numeric modelling
          Remote sensing
          Satellite technology