Researchers Mapped Four Million Arctic Lakes
The new Lost Lakes database uses satellite monitoring to track how permafrost thaw causes landscape-scale water loss.
Updated on Sept. 27, 2026 in Geography
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Scientists have released the Lost Lakes database, a public resource tracking 4 million Arctic lakes using remote sensing data collected since 2016. The project monitors how thawing permafrost—permanently frozen ground—can cause terrain to sink or drain, leading to sudden lake shrinkage.
Why it matters
Lakes serve as accessible surface-level indicators for subsurface permafrost stability, which is otherwise difficult to observe. Tracking these changes is essential because thawing permafrost releases stored carbon into the atmosphere, potentially creating a feedback loop that accelerates global warming.
The database contains records of 4 million Arctic lakes dating back to 2016. In one specific observation, researchers noted 200 lakes in northwestern Alaska that shrank during the summer of 2018.
The players
Alfred Wegener Institute
A German research institution focused on polar and marine science that tracks environmental shifts in the Arctic.
The details
Researchers utilize remote sensing—the process of collecting data about the Earth's surface from satellites—to monitor lake changes as a proxy for the structural health of the underlying permafrost. When permafrost melts, the ground may collapse or develop new drainage channels, causing water to escape. These records allow users to compare lake surface areas over time through an interactive map.
Timeline
12,000 years ago: Many Arctic lakes began their initial formation period.
Mid-20th century: Certain ponds in western Alaska began to form.
2016: The starting year for the longitudinal record within the database.
Summer 2018: Approximately 200 lakes in northwestern Alaska showed measurable shrinkage.
The Tech Race
This effort builds upon the Alfred Wegener Institute's established polar research by creating a unified monitoring platform. It marks a shift from isolated regional studies to a comprehensive, database-driven approach to tracking Arctic environmental degradation.
The Lost Lakes database is currently free for public use, allowing researchers and the general public to track landscape shifts across the Arctic. Users can compare satellite imagery from 2016 to the present to analyze regional water loss patterns.
The takeaway
Monitoring Arctic lakes provides a critical view into the warming planet's shifting permafrost. Users should monitor updates from the Alfred Wegener Institute to see if the database expands to cover earlier, pre-2016 historical satellite datasets.
Further reading
For more information on regional environmental monitoring, visit our Geography section.
Source note: This article includes information reported by The Cool Down.
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