Abstract：
:Although a key driver of Earth's climate system, global land-atmosphere energy fluxes are poorly constrained. Here we use machine learning to merge energy flux measurements from FLUXNET eddy covariance towers with remote sensing and meteorological data to estimate global gridded net radiation, latent and sensible heat and their uncertainties. The resulting FLUXCOM database comprises 147 products in two setups: (1) 0.0833° resolution using MODIS remote sensing data (RS) and (2) 0.5° resolution using remote sensing and meteorological data (RS + METEO). Within each setup we use a full factorial design across machine learning methods, forcing datasets and energy balance closure corrections. For RS and RS + METEO setups respectively, we estimate 2001-2013 global (±1 s.d.) net radiation as 75.49 ± 1.39 W m-2 and 77.52 ± 2.43 W m-2, sensible heat as 32.39 ± 4.17 W m-2 and 35.58 ± 4.75 W m-2, and latent heat flux as 39.14 ± 6.60 W m-2 and 39.49 ± 4.51 W m-2 (as evapotranspiration, 75.6 ± 9.8 × 103 km3 yr-1 and 76 ± 6.8 × 103 km3 yr-1). FLUXCOM products are suitable to quantify global land-atmosphere interactions and benchmark land surface model simulations.
journal_name
Sci Datajournal_title
Scientific dataauthors
Jung M,Koirala S,Weber U,Ichii K,Gans F,Camps-Valls G,Papale D,Schwalm C,Tramontana G,Reichstein Mdoi
10.1038/s41597-019-0076-8subject
Has Abstractpub_date
2019-05-27 00:00:00pages
74issue
1issn
2052-4463pii
10.1038/s41597-019-0076-8journal_volume
6pub_type
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