The Critical Zone Exploration Network (CZEN) is a network of people, sites, tools, and ideas to investigate processes within the Critical Zone. CZEN has been created by a consortium of researchers and educators drawn from the geosciences, hydrology, microbiology, ecology, soil science, and engineering who study the physical, chemical and biological processes shaping and transforming Earth’s outermost thin veneer.
CZEN network

CZEN is seeking to populate a network of observatories for investigating Critical Zone processes—especially weathering and soil formation—as a function of environmental variables across gradients as shown schematically in this diagram . CZEN is always seeking researchers who wish to add their site to the CZEN network.