Better estimating global gross primary productivity (GPP) from satellite-derived solar-induced chlorophyll fluorescence (SIF) data


My research with collaborators Cédric Bacour and Fabienne Maignan at the LSCE aims to assess  how we can use satellite-derived solar-induced chlorophyll fluorescence (SIF) data to evaluate and constrain gross primary productivity (GPP – gross carbon uptake) that is simulated by models at global scales. We have tested a simple approach to using SIF data in a model-data integration framework:

Our ongoing work involves the evaluating the consistency of different SIF products, and the continued development of the ORCHIDEE model to include a mechanistic description of the links between photosynthesis- and fluorescence-related processes.

This work was/is funded by:

  • FLuOR (Fluorescence in ORCHIDEE): a French CNES (Centre National d’Etudes Spatiales) Space Agency TOSCA (Terre solide, Océan, Surfaces Continentales, Atmosphère) Programme project to develop, test and optimize a new fluorescence model in the ORCHIDEE terrestrial biosphere model.
  • ESA FLEX Bridge: a preparatory scientific study for Solar Induced Fluorescence retrieval from satellites and applications in assessment of photosynthesis and stress status in terrestrial vegetation. The final report contributed to the scientific basis leading to the selection of the FLEX satellite as the European Space Agency’s (ESA) 8th Earth Explorer mission.