ArticleNature communications2026
Groundwater depletion contributes to an increase in global carbon emissions.
Article in Nature communications, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Authors and funding
10 authors.
Funding
Abstract
Carbon emissions from groundwater depletion (GWD) can be involved in the global carbon cycle; however, it is poorly understood that how much contribution they have. We here generate two maps on global GWD using measurements from >171,000 monitoring wells and on global groundwater bicarbonate (HCO₃⁻) concentrations using the meta data from 28,902 measurements. We then evaluate the global GWD-induced carbon emissions and show that 1) the total emissions from GWD can be a type of significant source (52 ± 18 MMT CO₂ yr⁻¹) within the global carbon cycle, which have exceeded the net emissions of grasslands (~35 MMT CO₂ yr⁻¹), one of the world's main carbon sources; 2) the total GWD is approximately 550 ± 73 km³/year in recent 20 years, which is generally consistent with previous studies; 3) China (6.7 ± 1.6 MMT CO₂ yr⁻¹), Brazil (6.6 ± 2.5MMT CO₂ yr⁻¹), and India (5.8 ± 1.5 MMT CO₂ yr⁻¹) are the top three contributors of GWD-induced carbon emissions.
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