Zach Brecheisen wins the Frederick K. Weyerhaeuser Forest History Fellowship

27 Apr 2017 - The Forest History Society announces that Zachary Brecheisen is the 2017-18 recipient of the F. K. Weyerhaeuser Fellowship! The fellowship consists...


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.


K-12 Soil Science Teacher Resources

24 Mar 2017 - The Soil Science Society of America (SSSA) is a professional scientific society, made up of soil scientists, educators, and consultants focused on...


Diego Barcellos Featured in UGA Graduate School Magazine

08 Feb 2017 - The Winter 2017 issue of UGA Graduate features an in-depth article about cross-CZO grad student Diego Barcellos


Bruno Latour talks about the Calhoun CZO in Munich

08 Dec 2016 - Bruno Latour, anthropologist and philosopher of science, gave a talk on Critical Zone science and the Anthropocene entitled "From the Anthropocene...


CZOs at AGU 2016

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


Four soil pits installed in new Research Area 8!

21 Nov 2016 - Four soil pits were installed in new Research Area 8 at the Calhoun CZO on 21-22 November 2016 for easy access for soil sampling down to 2 meters.


Eight new soil pits dug at the Calhoun!

17 Oct 2016 - Eight soil pits were installed at the Calhoun CZO on 17-18 October 2016 for easy access for soil sampling down to 2 meters. Photo: Will Cook.


USFS Photos from the Historic Archive of the Calhoun Experimental Forest

03 Oct 2016 - Just posted, thanks to efforts of Don Nelson, Kathy O'Neill, Mike Coughlan, Michael Lonneman, Zachary Meyers, and many other students, is an...


Super-high res Calhoun CZO 2016 Leaf-Off LiDAR data available!

03 Oct 2016 - The February 2016 leaf-off flight covered an area of 78.3 square kilometers, less than the summer 2014 flight, but with greater point density


An illustrated introduction to the Calhoun Critical Zone Observatory!

22 Sep 2016 - An introduction to the Calhoun Critical Zone Observatory, by Justin Richardson and Dan Richter, illustrated by Alana McGillis has just been posted!...


First flux tower erected at the Calhoun CZO

17 Aug 2016 - On August 17, 2016 a crew from Georgia Tech led by graduate student Yao Tang and professor Jingfeng Wang, with a little help from the folks at Duke,...


Going deep! Gas wells installed at 8.5 m

14 Jul 2016 - Another Calhoun CZO record - gas reservoirs installed at 8.5m depth! Jay Austin, Zach Brecheisen, and Dan Richter only stopped at 8.5m because they...


The Calhoun Experimental Forest featured in USFS publication

30 Mar 2016 - The USFS Southern Research Station's CompassLive blog features an article about the history of the Calhoun Experimental Forest, founded in 1947....


Critical Zone Profiles - Meet the people doing CZO science (Calhoun CZO)

15 Nov 2015 - Get a sense of the people and the work. Several members of the Calhoun CZO are profiled here, including students and professors.


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.


Sino-USA CZO scientists meet to discuss future collaborations

09 Oct 2015 - About 60 Chinese and American critical zone scientists met in Guiyang, China for two days of discussions and presentations on the significance of...

Calhoun CZO Headquarters!

15 Sep 2016 - At long last, a 900 sq ft house is now our headquarters at the Calhoun!!! We should all start to use it for multi-day, 2-day, & even 1-day...

TDR probes installed to monitor soil moisture

13 Jul 2016 - On July 13, 2016, Duke PhD candidate Zach Brecheisen, with assistance from his advisor Dan Richter and Jay Austin, installed TDR probes at 25-cm...

Field trip to quarry near Calhoun CZO

09 Jun 2016 - On Thursday 9 June 2016, Paul Schroeder led a several hour tour of the Hanson Aggregates Quarry (AKA Mary Lou Rock Quarry) in Clinton SC, about 15...

Critical Zone Profile - Diego Barcellos

09 Jun 2016 - PhD Student, Soil Science, University of Georgia

Historic Legacy Sediments Examined at 2016 Summer Science Meeting

03 Jun 2016 - The Calhoun CZO held its third annual Summer Science Days meeting.  In the photo, Calhoun researchers discuss a 18th-19th century pine root...

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2017 Arlington Meeting for Critical Zone Science

"Critical Zone Science: Current Advances and Future Opportunities”. Arlington, VA (near NSF).
DEADLINE: 01 APRIL 2017 for registration & optional abstract.

Hilton Hotel, Arlington, Virginia.

CZO Webinar: Policy Relevance of Critical Zone Science

Policy Relevance of Critical Zone Science webinar presented by Steve Banwart


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Integration of fuzzy logic and image analysis for the detection of gullies in the Calhoun Critical Zone Observatory using airborne LiDAR data. Noto, L. V., S. Bastola, Y. G. Dialynas, E. Arnone, and R. L. Bras (2017): ISPRS Journal of Photogrammetry and Remote Sensing 126: 209-224


Expanding the role of reactive transport models in critical zone processes. Li Li, Kate Maher, Alexis Navarre-Sitchler, JennyDruhan, Christof Meile, Corey Lawrence, Joel Moore, Julia Perdrial, Pamela Sullivan, Aaron Thompson, Lixin Jin, EdwardW. Bolton, Susan L. Brantley, William E. Dietrich, K. Ulrich Mayer, Carl I. Steefel, Albert Valocchi, John Zachara, Benjamin Kocar, Jennifer Mcintosh, Benjamin M. Tutolo, Mukesh Kumar, Eric Sonnenthal, Chen Bao, Joe Beisman (2017): Earth-Science Reviews, 165:280-301 Cross-CZO


Hydro-geomorphic perturbations on the soil-atmosphere CO2 exchange: How (un)certain are our balances?. Dialynas, Y. G., R. L. Bras, and D. deB. Richter (2017): Water Resources Research, 53


Special issue of The Earth Scientist about the Critical Zone and the US NSF Critical Zone Observatory (CZO) program. CZO Education/Outreach team (2016): The Earth Scientist, Volume XXXII, Issue 3, Fall 2016 Cross-CZO National


Clays in the Critical Zone: An Introduction . Paul Schroeder (2016): Clays and Clay Minerals 65 (5): 586-587


Topographic variability and the influence of soil erosion on the carbon cycle. Dialynas, Y. G., S. Bastola., R. L. Bras, S. A. Billings, D. Markewitz, and D. deB. Richter (2016): Global Biogeochemical Cycles 30(5): 644-660


Geophysical imaging reveals topographic stress control of bedrock weathering. St. Clair, J., S. Moon, W. S. Holbrook, J. T. Perron, C. S. Riebe, S. J. Martel, B. Carr, C. Harman, K. Singha, D. deB. Richter (2015): Science, 30 October 2015, Vol. 350, no. 6260, pp. 534-538 Cross-CZO National


Chapter 2 – The Role of Critical Zone Observatories in Critical Zone Science. White T., Brantley S., Banwart S., Chorover J., Dietrich W., Derry L., Lohse K., Anderson S., Aufdendkampe A., Bales R., Kumar P., Richter D., McDowell B. (2015): Developments in Earth Surface Processes 19: 15–78 Cross-CZO National


'One Physical System': Tansley's ecosystem as Earth's critical zone. Richter, D. deB., and S.A. Billings (2015): New Phytologist 206 (3): 900-912


Diachronous beginnings of the Anthropocene: The lower bounding surface of anthropogenic deposits. Edgeworth, M., D.deB. Richter, C. Waters, P. Haff, C. Neal, S.J. Price (2015): The Anthropocene Review 2 (1): 33-58


Surficial gains and subsoil losses of soil carbon and nitrogen during secondary forest development. Mobley, Megan L., Kate Lajtha, Marc G. Kramer, Allan R. Bacon, Paul R. Heine and Daniel deB. Richter (2015): Global Change Biology 21(2): 986-996


Evolution of Soil, Ecosystem, and Critical Zone Research at the USDA FS Calhoun Experimental Forest. Richter, D. deB., A.R. Bacon, S.A. Billings, D. Binkley, M. Buford, M.A. Callaham, A.E. Curry, R.L. Fimmen, A. S. Grandy, P.R. Heine, M. Hofmockel, J.A. Jackson, E. LeMaster, J. Li, D. Markewitz, M.L. Mobley, M.W. Morrison, M.S. Strickland, T. Waldrop, and C. G. Wells (2014): In: USDA Forest Service Experimental Forests and Ranges: Research for the Long Term, Chapter: 18, Publisher: Springer Verlag, Editors: D.C. Hayes, S.L. Stout, R.H. Crawford, A.P. Hoover, pp. 405-433

The Anthropocene is functionally and stratigraphically distinct from the Holocene. Waters, C.N., and 23 co-authors, including D.deB. Richter (2016): Science 351(6269): 137

Comment on “Storage selection functions: A coherent framework for quantifying how catchments store and release water and solutes” by Rinaldo et al. Porporato, A., and S. Calabrese (2016): Water Resources Research 52(1): 613-615

Optimal control solutions to sodic soil reclamation. Mau, Y. and A. Porporato (2016): Advances in Water Resources 91: 37-45

Beyond the SCS-CN method: Theoretical framework for spatially-lumped rainfall-runoff response. Bartlett, M.S., A.J. Parolari, J.J. McDonnell, and A. Porporato (2016): Water Resources Research 52(6): 4608-4627

Framework for event-based semidistributed modeling that unifies the SCS-CN method, VIC, PDM, and TOPMODEL. Bartlett, M.S., A.J. Parolari, J.J. McDonnell, and A. Porporato (2016): Water Resources Research, in press

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