About Me
I am currently Senior Scientist with the European Centre for Medium-Range Weather Forecasts (ECMWF) where I am responsible of the land surface data assimilation activities. My research activities have been 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 satallite data availability (e.g. ASCAT, SMOS, SMAP). Land surface analysis includes: screen level parameters analysis, snow analysis, soil moisture & temperature analysis.
A new soil moisture analysis scheme based on a point-wise Extended-Kalman Filter (EKF) for the global land surface was developed and implemented in operations in the IFS cycle 36r4 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, we 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. The new snow analysis has been implemented in operations in IFS cycle 36r4 in November 2010. Further revision of the snow analysis, with improved assimilation of IMS snow cover data, including separate error specification, was implemented in IFS cycle 39r1 that will become operational in Autumn 2013. This cycle will also include land surface observation monitoring and improved land surface blcklisting system.
Before working at ECMWF I worked for 5 years (2002-2007) as research scientist for the French CNRS (Centre National de la Recherche Scientifique) at CESBIO (Toulouse). I was invloved in soil moisture and passive microwave radiometry observation ground experiments (SMOSREX, AMMA, Nafe2005), in the Soil Moisture and Ocean Salinity (SMOS) satellite mission preparation, and in coordinated land surface modeling experiments (ALMIP).
My previous experiments, from 1994 to 2002, was focused on land surface modelling developments. In particular, I 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).
E-mail: Patricia dot Rosnay at ecmwf dot int
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