Understanding the cave atmosphere

Learn about oxygen, carbon dioxide and radon in caves, and explore environmental readings from a monitored site in the Algarve.

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Environmental readings
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Values reflect the latest available snapshot for public display. All times are UTC.

Gases in the cave environment

Why oxygen, carbon dioxide and radon matter underground.

Oxygen (O₂)

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Carbon dioxide (CO₂)

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Radon (Rn)

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Barrocal-Cave project

Conservation, monitoring and restoration assessment of a world-class cave biodiversity hotspot in Portugal — funded by the Prémio Fundação Belmiro de Azevedo-FCT 2023.

Read about the project