Facilitating the accessibility of in-situ datasets and their integration with Remote Sensing activities: the FLUXNET products in the datasets STAC catalogue of the OEMC project

With recent advancements of satellite images in terms of spatial resolution and feature-specific bands, the need for high quality in-situ datasets for calibration and validation activities is growing proportionally, together with the definition of sensor standards, setup and sampling design. In this context, the Open Earth Monitor Cyberinfrastructure (OEMC) project, funded by Horizon Europe, aims at building operational, cloud-optimized and open tools, and Earth Observations datasets in support of environmental policies. That also includes a wide range of in-situ datasets for supporting 32 OEMC use cases. The global network of flux tower stations FLUXNET is contributing to the OEMC with in-situ measurements of GHG fluxes based on the eddy covariance (EC) technique, using a comprehensive list of highly-standardized meteorological variables. This involves two types of challenges: from the one side, there is the need for the definition of a catalogue for the in-situ domain of the OEMC project, to be integrated with the other services; from the other, it is desirable to have an implementation of an even more accessible tool for FLUXNET datasets, and its integration with a new EC footprint product characterized by higher temporal resolution for an even better integration with remote sensing (RS) activities. In this presentation we illustrate the rationale that guided us in the implementation of a STAC catalogue for the in-situ datasets of the OEMC project, and its first version now released. We also present the new “Shuttle” system for accessing the FLUXNET datasets, and a new output for representing the EC footprint at half-hourly scale, currently implemented only for the Integrated Carbon Observation System (ICOS), but potentially extensible to other networks.