Articles | Volume 13, issue 4
Earth Syst. Sci. Data, 13, 1711–1735, 2021
Earth Syst. Sci. Data, 13, 1711–1735, 2021

Data description paper 27 Apr 2021

Data description paper | 27 Apr 2021

Gap-free global annual soil moisture: 15 km grids for 1991–2018

Mario Guevara et al.

Data sets

Gap-Free Global Annual Soil Moisture: 15km Grids for 1991-2018 M. Guevara, M. Taufer, and R. Vargas

Soil moisture training dataset ESA-CC

Soil moisture validation dataset ISMN

A Global Database of Soil Respiration Data, Version 4.0 B. P. Bond-Lamberty and A. M. Thomson

LBA-ECO CD-32 Flux Tower Network Data Compilation, Brazilian Amazon: 1999-2006 S. R. Saleska, H. R. da Rocha, A. R. Huete, A. D. Nobre, P. Artaxo, and Y. E. Shimabukuro

Model code and software

Supporting R code R. Vargas

Short summary
Soil moisture is key for understanding soil–plant–atmosphere interactions. We provide a machine learning approach to increase the spatial resolution of satellite-derived soil moisture information. The outcome is a dataset of gap-free global mean annual soil moisture predictions and associated uncertainty for 28 years (1991–2018) across 15 km grids. This dataset has higher agreement with in situ soil moisture and precipitation measurements. Results show a decline of global annual soil moisture.