Zoom on the Phenobs project

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The Phénobs project is a Labex CEBA project. One of the central objectives of the project is to use this type of data acquired repeatedly over time to quantify variations in density and age of foliage. These variations are very difficult to measure in dense evergreen forest, and could explain the seasonal cycles of vegetation indices detected by satellite and gas exchanges with the atmosphere seen by the flow towers.

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Comparative temporal analysis of CO2 flows between 5 French stations of the ICOS Ecosystem network

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We assembled homogenized long-term time series, up to 19 years, of measurements of net ecosystem exchange of CO2 (NEE) and its partitioning between gross primary production (GPP) and respiration (Reco) for five different ecosystems representing the main plant functional types (PFTs) in France. Part of these data was analyzed to determine the influence of the main environmental variables on carbon fluxes between temperate ecosystems and the atmosphere, and to investigate the temporal patterns of their variations. A multi-temporal statistical analysis of the time series was conducted using random forest (RF) and wavelet coherence approaches.

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