Our nine U.S. Thematic Clusters study Earth’s outer skin - where water, atmosphere, ecosystems, soil & rock interact.

About CZNet

The Critical Zone Collaborative Network (CZNet) is the next phase of NSF’s Critical Zone research program, comprised of nine Thematic Clusters with a wide range of geological, climatic, and land use settings that provide an opportunity to better understand the critical zone.

Learn More About CZNet

What is the Critical Zone

The Critical Zone is Earth's outer skin, but often defined from bedrock to treetop. This is an enviro​nment where rock, soil, water, air, and living organisms interact and shape the Earth's surface.

CZNet All Hands 2024: Registration is now open!

We are pleased to announce that the 2024 All Hands Meeting will take place August 6-8, 2024 at University of Illinois Urbana-Champaign, with CINet serving as the host cluster. Registration and event information is available at the link below.

Learn More

NEW Research Opportunity for Undergraduates(CZ-REU)!

CZNet is pleased to announce a newly-funded CZ-REU Program!

Program Dates: May 29-Aug 7, 2024

Deadline to Apply: February 21st, 2024 11:59 PM ET

Learn More

The Critical Zone Collaborative Network builds upon the outcomes of the Critical Zone Observatories project.

The Critical Zone Observatories (CZO) project was started in 2007 and consisted of nine observatories. The CZO website has been archived for reference.

View the Archived Critical Zone Observatories Website

Sign up for our newsletter!

Stay up to date with the latest from CZNet.

Subscribe to the CZNet Newsletter