Scaling carbon fluxes from eddy covariance sites to globe: synthesis and evaluation of the FLUXCOM approach

Abstract. FLUXNET comprises globally distributed eddy-covariance-based estimates of carbon fluxes between the biosphere and the atmosphere. Since eddy covariance flux towers have a relatively small footprint and are distributed unevenly across the world, upscaling the observations is necessary to obtain global-scale estimates of biosphere–atmosphere exchange. Based on cross-consistency checks with atmospheric inversions, sun-induced fluorescence (SIF) and dynamic global vegetation models (DGVMs), here we provide a systematic assessment of the latest upscaling efforts for gross primary production (GPP) and net ecosystem exchange (NEE) of the FLUXCOM initiative, where different machine learning methods, forcing…

• NS
  National Science Foundation

  Award: 1852977
• UD
  U.S. Department of Energy

  Awards: 1852977, DE-SC0016323
• ES
  European Space Agency

  Awards: ESRIN/4000123002/18/I-NB, 4000123002/18/I-NB, 820852
• M
  Max-Planck-Gesellschaft
• H2
  Horizon 2020 Framework Programme

  Awards: 820852, 776186, 776810, 640176
• DO
  Division of Chemistry
• HE
  H2020 European Institute of Innovation and Technology

  Awards: 820852, 776810