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Areas of Interest:

  • Land surface data assimilation
  • Numerical Weather Prediction
  • Land surface in situ and satellite observations
  • Remote sensing and microwave emission modelling

Current activities

Patricia is Senior Scientist with the European Centre for Medium-Range Weather Forecasts (ECMWF) where she is responsible of the Land surface Data Assimilation System (LDAS) activities.  Her research activities are focused on the development of a multi-variate surface data assimilation system in the Integrated Forecasting System (IFS) to cope with the increase in model complexity and new satellite data availability (e.g. ASCAT, SMOS, SMAP). Land surface analysis includes: screen level parameters analysis, snow analysis, soil moisture & temperature analysis.
She implemented a new soil moisture analysis scheme based on a point-wise Extended-Kalman Filter (EKF) for the global land surface in the ECMWF Integrated Forecasting System in November 2010. As part of the EKF implementation strategy a new surface analysis structure was implemented in 2009 to separate completely the upper air analysis and the surface analysis. The new EKF surface analysis opens the possibility to investigate the use of active (ASCAT) and passive (SMOS) microwave satellite data for soil moisture analysis in Numerical Weather Prediction.
Concerning snow, she conducted major research developments in the past few years to improve the quality of the snow analysis, to do a better usage of the satellite snow cover information (use of the IMS NESDIS snow cover information ) and to improve the SYNOP data quality control. She implemented implemented an Optimal Snow analysis (OI) in operations in November 2010 and further revision of the snow analysis, with improved assimilation of IMS snow cover data, including separate error specification that was implemented in IFS cycle 40r1 in November 2013. Land surface observation monitoring and improved land surface blacklisting system were part of these developments.

Patricia de Rosnay coordinating the SMOS and H-SAF projects at ECMWF. She is also Member of:

Career background

Before working at ECMWF Patricia worked for 5 years (2002-2007) as research scientist for the French CNRS (Centre National de la Recherche Scientifique) at CESBIO (Toulouse). She was invloved in soil moisture and passive microwave radiometry observation field experiments (SMOSREX, AMMA, Nafe2005), in the Soil Moisture and Ocean Salinity (SMOS) satellite mission preparation, and in coordinated land surface modeling experiments (ALMIP).

Her previous professional experience from 1994 to 2002, was focused on global land surface modelling developments. In particular, she developed the multi-layer hydrology, sub-grid scale representation of vegetation and soil texture and the irrigation parameterisation in the ORCHIDEE land surface model at the Laboratoire de Météorologie Dynamique (LMD/IPSL, Paris, France).

Patricia de Rosnay received her Ph.D degree in climate modelling from the University Pierre et Marie Curie (Paris 6, France) in 1999.


E-mail: Patricia dot Rosnay at ecmwf dot int



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