ARCHIVED CONTENT: In December 2020, the CZO program was succeeded by the Critical Zone Collaborative Network (CZ Net) ×


Critical zone currencies have consequences for climate, ecology (terrestrial-to-riverine-to-coastal ocean), and human welfare. A broad model framework is needed to guide data collection and analysis in our four focal questions, to synthesize the data into a self-consistent framework, and to project how the critical zone and its currencies will change with climate and landuse.

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At the highest level, we view the critical zone as mediating the effect of climate and land use on terrestrial sub-systems: terrestrial vegetation, hydrologic dynamics in the critical zone and the channel network, solute and sediment fluxes, and ultimately the quality of in-stream and near-shore aquatic ecosystems. The CZ also mediates feedback from terrestrial systems to the local and regional climate. Our understanding of the propagation of influence between climate and these terrestrial systems, via the CZ, is complicated by complex, coupled nature of the relevant processes.
We propose developing a numerical platform to assist with developing this understanding: the Atmosphere, Watershed, Ecology, Stream and Ocean Model (AWESOM). Read more under our 
We will use AWESOM to synthesize the findings from smaller scale studies, couple the different CZ subsystems together, and explore long-term and large-scale consequences of the dynamics of the CZ in the context of changes in climate, land use, and water management policy.



Modelling News


CZ colleagues: Please contact us about proposals for NSF’s CZ Collaborative Network, due 02 Dec 2019

08 Jul 2019 - CZO will end Nov 2020, succeeded by the “CZ Collaborative Network”. Let’s explore how the CZ community can build upon the CZOs via new NSF proposals.

Water Resources Research Special Collection: Concentration-discharge relations in the critical zone

30 Oct 2017 - Water Resources Research published a new special collection in September 2017 featuring concentration-discharge research from multiple CZOs.

EOS: Taking the Pulse of the Earth’s Surface Systems

04 Dec 2015 - Taking the Pulse of the Earth's Surface Systems In September of 2014, Laurel Larsen (UC Berkley), Elizabeth Hajek (Penn State), and others...

Using a CZO network to explore the architecture, dynamics and evolution of the Critical Zone

03 Nov 2014 - The US CZO National Office has organized a webinar on December 8, 2014 at 11AM - 12:30 PM ET.

Bottom-up model predicts depth to fresh bedrock under hillslopes

16 May 2014 - University of California, Berkeley, geologist William Dietrich pioneered the application of airborne LIDAR – light detection and ranging...

Reactive Transport Modeling Survey – Community Needs for Biogeochemical Studies

08 Apr 2014 - Reactive Transport Modeling Survey – Community Needs for Biogeochemical Studies The below survey is designed by Alexis Navarre-Sitchler, Kate...

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Atmospheric, Watershed, Ecological, Stream and Ocean Model
Modeling long-term and large-scale consequences of CZ dynamics in the context of changes in climate, land use, and water mgmt.