Space

The Human Fingerprint on Earth’s Water Cycle

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Based on a feed excerpt; full article content has not been acquired. Source evidence retrieved 20/10/2026, 13:20:26 UTC.

Briefings

A NASA study using GRACE satellite data from 2002 to 2025 reveals 40 regions where human activities significantly altered terrestrial water storage. Key findings include strong human influence in California's Central Valley, northern India, and northern Brazil, where groundwater pumping and irrigation drove declines or increases. The study identified specific locations like the Boguchany Reservoir in Russia and the Karakum Canal in Turkmenistan as major contributors. The research highlights how human water management overrides climate variability in certain areas, with some regions showing stronger anthropogenic signals than climate factors.

Key points

• GRACE and GRACE-FO missions provided 20+ years of gravity measurements to map terrestrial water storage changes from April 2002 to November 2025.
• 40 regions showed strong associations with human activities, including California's Central Valley, northern India, and northern Brazil, where groundwater pumping and irrigation drove significant storage changes.

Context

This research utilizes over two decades of satellite data to identify where human activities like irrigation and reservoir filling significantly impact Earth's water cycle, revealing specific locations where human influence overrides climate variability.

Limitations

Data coverage spans 2002-2025 with limited temporal detail due to processing constraints. Some trends were previously detected but refined here. Specific causal links between certain farming practices and storage changes require further verification.

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