For the quantification and monitoring of anthropogenic contributions to the atmospheric CO2 concentration as targeted by CHE, estimates of the natural carbon fluxes between the land surface and the atmosphere need to be included in any analysis. We provide here as deliverable to WP3 (‘Coordinating efforts on uncertainty trade-off for fossil fuel emissions’) task 1 data-driven estimates of the net carbon exchange as well as of the gross photosynthetic carbon uptake of the terrestrial biosphere merging in-situ measurements, machine learning and satellite observations. This report illustrates the datasets (hourly, 0.5deg, global) and the associated uncertainties derived from a leave-one-site-out cross validation exercise. The flux data sets were uploaded to the ECMWF ftp project server. They can furthermore be accessed through direct contract to Sophia Walther () or Martin Jung (firstname.lastname@example.org).