Critical Zones

The Critical Zone is Earth's permeable near-surface layer.... 

from the tops of the trees to the bottom of the groundwater. It is a living, breathing, constantly evolving boundary layer where rock, soil, water, air, and living organisms interact. These complex interactions regulate the natural habitat and determine the availability of life-sustaining resources, including our food production and water quality. The Clay Science group at UGA plays a part in this effort with a history of research and funding to study the geologic record of global change. We are now part the CZO network conducting interdisciplinary research at the Calhoun Critical Zone Observatory, which represents the first CZO located in the southeastern United States.

Critical Zone Observatories (CZO)

Critical Zone Exploration Network (CZEN)

Soil Transformations in European Catchments (SoilTrEC)


Here are review publications that discuss the need for establishing CZO's


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