Articles | Volume 11, issue 3
Earth Syst. Dynam., 11, 755–774, 2020
Earth Syst. Dynam., 11, 755–774, 2020

Research article 27 Aug 2020

Research article | 27 Aug 2020

Groundwater storage dynamics in the world's large aquifer systems from GRACE: uncertainty and role of extreme precipitation

Mohammad Shamsudduha and Richard G. Taylor

Data sets

GRACE and GLDAS datasets for world's large aquifer systems Mohammad Shamsudduha and Richard Taylor

Short summary
Recent assessments of the sustainability of global groundwater resources using the Gravity Recovery and Climate Experiment (GRACE) satellites assume that the underlying trends are linear. Here, we assess recent changes in groundwater storage (ΔGWS) in the world’s large aquifer systems using an ensemble of GRACE datasets and show that trends are mostly non-linear. Non-linearity in ΔGWS derives, in part, from the episodic nature of groundwater replenishment associated with extreme precipitation.
Final-revised paper