Sebastien Garrigues

Scientist - Land Data Assimilation
Copernicus Department, Copernicus CAMS Services

Summary:
Sebastien Garrigues is a full-time scientist in the coupled data assimilation team, earth system assimilation section in the research department. He has 22 years of research experiences in Earth observation and Earth system modelling for NWP and environmental applications (hydrology, carbon budget, agriculture and atmospheric composition). He has skills in land surface modelling, Earth observation, data assimilation and machine learning . His approach relies on learning the land processes from process-based modelling, data assimilation and machine learning.  His current research aims at improving the land data assimilation system in the Integrated Forecast System (IFS) to consistently constraint both the water and carbon cycles over land. His main achievement is the development of machine learning-based observation operators to assimilate level-1 microwave observations and Solar-Induced chlorophyll Fluorescence (SIF) .
Professional interests:
  • Earth system science for NWP, CO2 and hydrology: 
    • Land surface: water and carbon cycles, surface-atmosphere coupling
    • Atmospheric composition: aerosol, biomass burning emission
  • Machine-learning: observation operator, model emulator, parameter optimisation
  • Data assimilation: 
    • Land: Microwave passive and active observations, Solar Induced Fluorescence, Leaf Area Index.
    • Aerosol
    • Fire
Career background:
  • 2023-present: Scientist - Land data assimilation - Development of machine learning-based observation operator for the assimilation of level-1 microwave and Solar Induced Fluorescence (SIF) observations in the Integrated Forecast System (IFS) - CORSO horizon Europe project - ECMWF (Coupled data assimilation team, ESAS section, RD department) 
  • 2019-2023: Scientist - Atmospheric composition - Assimilation of satellite products for aerosol and biomass burning emission monitoring- Copernicus Atmosphere Monitoring Service (CAMS) - ECMWF
  • 2018-2019:·Researcher (visiting scientist ) - Development and evaluation of a multi-source energy balance scheme in the JULES land surface model - Hydro-JULES fellow – Center for Ecology and Hydrology (CEH), Wallingford, UK
  • 2016-2018:· Researcher - Long-term evolution of evapotranspiration for Mediterranean regions : Impact of adaptations of crop managements in the context of climate change - Marie Curie/Agreenskill+ Awarded fellowship (Marie-Curie FP7 COFUND People Programme) - visiting scientist at Department of Geography and Environmental Science at the University of Reading, Reading, UK and Centre for Ecology and Hydrology (CEH), Wallingford, UK.
  • 2010-2016: Researcher (tenured position) - Impact of global changes on the long-term evolution of the water balance of Mediterranean regions: uncertainty in evapotranspiration predictions - Institut National de Recherche Agronomique (INRA, French National Agronomy Research), EMMAH (Modelling Agricultural and hydrological systems in Mediterranean environment), Avignon, France