ARCHIVED CONTENT: In December 2020, the CZO program was succeeded by the Critical Zone Collaborative Network (CZ Net) ×
Christina CZO was active 2009-2013 ×



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.


NSF Discovery articles focus on the CZOs.

10 May 2018 - The Discoveries section of the National Science Foundation's website on Critical Zone Observatories (CZOs).

White paper of 2017 CZ Science Meeting in Arlington, VA

01 Jan 2018 - New Opportunities for Critical Zone Science Following the June 2017 Arlington Meeting for Critical Zone Science (hosted by CZO), a white booklet...


CZOs at AGU 2017

05 Dec 2017 - Information on CZO award recipients, events, presentations, etc. at the 2017 AGU Fall Meeting.

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.

The frontier beneath our feet — an AGU commentary on the critical zone

21 Apr 2017 - AGU has published a collection of commentaries highlighting the important role Earth and space science research plays in society.

2017 CZO Webinar Series: Critical Zone and Society

06 Apr 2017 - 2017 CZO Webinar Series: Critical Zone and Society.


CZOs at AGU 2016

22 Nov 2016 - CZOs at AGU 2016: Agenda and award recipients

2016 CZO REUs and RETs present summer research

01 Aug 2016 - CZO REUs and RETs presented their research at the CUAHSI Biennial Colloquium, July 24-27, 2016, in Shepherdstown, West Virginia. The presentations...

AGU Abstracts due August 3: List of CZ Sessions

24 Jul 2016 - AGU 2016 sessions related to CZ science. Submit your abstract by August 3.


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...

New study suggests bedrock weathering based on topography

30 Oct 2015 - St. Clair et al. suggest tectonic stresses interact with topography to influence bedrock weathering.

2015 CZO REUs and RETs present summer research

17 Aug 2015 - The Critical Zone Observatory Research Experience for Undergraduates and Research Experience for Teachers program traveled to Baltimore, Maryland to...

Joint AGU-ESA Event Brings Together Collaborative Networks

17 Aug 2015 - Members of AGU and the Ecological Society of America came together in their first joint event to discuss opportunities for research collaboration.

The 2015 CZO REU/RET orientation begins at Penn State

10 Jun 2015 - Funded by the National Science Foundation, eight REU/RET participants with Susquehanna Shale Hills Critical Zone Observatory joined seven...


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.

CZO REUs and RETs present research at 2014 CUAHSI Biennial Meeting

26 Aug 2014 - The Critical Zone Observatory Research Experience for Undergraduates and Research Experience for Teachers program participants traveled to...

2014 All Hands Meeting

24 Apr 2014 - Information for the 2014 All Hands Meeting for the CZO Network on 21-14 September, including registration information and abstract submission.

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...

“What’s so critical about the Critical Zone?” webinar

02 Apr 2014 - March 31, 2014. Dr. Enriqueta Barrera (NSF CZO program director) and Dr. Gordon Grant (USFS; CZO Steering Committee chairperson)


Career Opportunities: NSF Program Director, Hydrologic Sciences, Rotator; two (2)  Openings

12 Nov 2013 - The Division of Earth Sciences has two vacant rotator positions in the Hydrologic Sciences program of the Surface Earth Processes (SEP)...

Discoveries in the Critical Zone: Where Life meets Rock

11 Jul 2013 - The National Science Foundation's Cheryl Dybas recently finalized a new report entitled "Discoveries in the Critical Zone: Where Life meets...

Post-doctoral researcher Diana Karwan funded to accomplish cross-CZO science

11 Jan 2013 - Karwan awarded an NSF EAR Postdoctoral Fellowship to work with Susquehanna Shale Hills and Christina River Basin Critical Zone Observatories


Critical Zone Observatory Sensor Blog Launched

04 Dec 2012 - Steve Hicks, Stroud Water Research Center’s research engineer, has launched a blog aimed at sharing wireless sensor network ideas, designs,...

CZO Presentations at 2012 AGU

03 Dec 2012 - A listing of more than 125 CZO-related presentations for the 2012 annual meeting of the AGU.

Scientists Sample Stormwater in Eye of Hurricane Sandy

07 Nov 2012 - Hurricane Sandy has brought significant devastation to some East Coasters, but for scientists at Stroud Water Research Center, the University of...

Science on the Graveyard Shift: Discovering what gets buried and how

31 Oct 2012 - By dark of night in an old graveyard, things rustle. At least if that cemetery is at London Grove Friends Meeting in Kennett Square, Pa. Look...

New wells to provide critical zone data

03 Aug 2012 - A major research effort was underway the last week of July 2012, led by the faculty and students of the Christina River Basin Critical Zone...

Rutgers-Newark Geophysical Society visits for Christina River Basin CZO forest survey

19 Apr 2012 - On April 18-19, 2012, colleagues from Rutgers University, Temple University, and City University of New York visited the Christina River Basin CZO...

Introducing our post-doctoral researchers’ CZO work

15 Mar 2012 - 2011 witnessed the most extensive use of post-doctoral researchers in Stroud Water Research Center’s 45-year history, with four newly minted Ph.D.s

Holly Michael receives prestigious grant at University of Delaware

01 Mar 2012 - The most widespread contaminant of groundwater is not a microbe, industrial chemical or harmful element such as arsenic, according to University of...

Investigating the earth’s critical zone

30 Jan 2012 - To the ordinary eye, south-central Pennsylvania's Shale Hills catchment is a pleasant little tract of deciduous forest much like any other in...

A critical workshop - Landmark international workshop for critical zone scientists held at UD

18 Jan 2012 - International collaboration in critical zone science took a giant step forward in November when about 80 researchers from the U.S., Europe, China...


Levia awarded Humboldt Fellowship to conduct research on insect-forest interactions

19 Dec 2011 - On the underside of a beech leaf, there may be small, white clumps that look like cotton candy. Upon closer look, these sticky fibers encase...

Critical research: Understanding complex interactions within Earth’s critical zone

15 Dec 2011 - Donald Sparks, Anthony Aufdenkampe, and Lou Kaplan reveal their progress in understanding the complex interactions within the Earth's critical zone

Soil solutions: UD doctoral student in soil science receives Dixon Award

30 Nov 2011 - Chunmei Chen, a University of Delaware doctoral student in the Department of Plant and Soil Sciences, was chosen to receive the Dixon Award for best...

Stroud Scientists at Work: Scientists Tour Critical Zone Observatories

15 Sep 2011 - Local bow hunters and about 80 water research scientists from Europe, North America, China, and Australia were among the few humans braving the...

Hurricane Irene: Scientists Collect Water Quality and Climate Change Data from Huge Storm

29 Aug 2011 - While Hurricane Irene had officials along the East Coast preparing for mass evacuations, scientists at the Stroud Water Research Center and the...

For the love of trees: Levia edits major book on forest hydrology and biogeochemistry

25 Jul 2011 - Delphis (Del) Levia, associate professor of geography at the University of Delaware, has always loved trees. Growing up on his parents' 93-acre...


Team to study human effect on watershed

19 Oct 2009 - The narrow creek that runs behind the Stroud Water Research Center has witnessed plenty of changes over the centuries. Hundreds of years ago,...

New Critical Zone Observatory seeks to answer climate change questions

28 Sep 2009 - The University of Delaware, in collaboration with Stroud Water Research Center in Avondale, Pa., has received a $4.3 million grant from the National...

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