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


under construction

Featured Publications


Increasing plant water stress and decreasing summer streamflow in response to a warmer and wetter climate in seasonally snow‐covered forests. Christensen L., Adams HR, Tai X, Barnard HR, Brooks PD (2020): Ecohydrology e2256 (online) Cross-CZO


Resolving Deep Critical Zone Architecture in Complex Volcanic Terrain. Moravec B.G., White A.M., Root R.A, Sanchez A., Olshansky Y., Paras B.K., Carr B., McIntosh J., Pelletier J.D., Rasmussen C., Holbrook W.S., Chorover J. (2020): Journal of Geophysical Research: Earth Surface 125(1): e2019JF005189 Cross-CZO


Ecological and genomic attributes of novel bacterial taxa that thrive in subsurface soil horizons. Brewer, Tess E., Emma L. Aronson, Keshav Arogyaswamy, Sharon A. Billings, Jon K. Botthoff, Ashley N. Campbell, Nicholas C. Dove, Dawson Fairbanks, Rachel E. Gallery, Stephen C. Hart, Jason Kaye, Gary King, Geoffrey Logan, Kathleen A. Lohse, Mia R. Maltz, Emilio Mayorga, Caitlin O’Neill, Sarah M. Owens, Aaron Packman, Jennifer Pett-Ridge, Alain F. Plante, Daniel D. Richter, Whendee L. Silver, Wendy H. Yang, Noah Fierer (2019): mBio Oct 2019, 10 (5) e01318-19 Cross-CZO National


Mercury sourcing and sequestration in weathering profiles at six Critical Zone Observatories. Richardson, Justin B., Arnulfo A. Aguirre, Heather L. Buss, A. Toby O'Geen, Xin Gu, Daniella M. Rempe, and Daniel deB. Richter (2018): Global Biogeochemical Cycles, 32(10):1542-1555 Cross-CZO National


Ideas and perspectives: Strengthening the biogeosciences in environmental research networks. Richter, D.D., S.A. Billings, P.M. Groffman, E.F. Kelly, K.A. Lohse, W.H. McDowell, T.S. White, S. Anderson, D.D. Baldocchi, S. Banwart, S. Brantley, J.J. Braun, Z.S. Brecheisen, C.W. Cook, H.E. Hartnett, S.E. Hobbie, J. Gaillardet, E. Jobbagy, H.F. Jungkunst, C.E. Kazanski, J. Krishnaswamy, D. Markewitz, K. O’Neill, C.S. Riebe, P. Schroeder, C. Siebe, W.L. Silver, A. Thompson, A. Verhoef, G. Zhang (2018): Biogeosciences 15: 4815-4832 Cross-CZO National


New Opportunities for Critical Zone Science. Sullivan, P.L., Wymore, A.S., McDowell, W.H. et al. (2017): 2017 CZO Arlington Meeting White Booklet Cross-CZO National


Quantifying the effects of wildfire on changes in soil properties by surface burning of soils from the Boulder Creek Critical Zone Observatory. Wieting, C., Ebel, B. A., Singha, K. (2017): Journal of Hydrology: Regional Studies Volume 13, October 2017, Pages 43-57


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 350 (6260): 534-538 Cross-CZO National


Common Critical Zone Observatory (CZO) Infrastructure and Measurements. J. Chorover, S. Anderson, A. K. Aufdenkampe, R. C. Bales, S. L. Brantley, W. Dietrich, P. Kumar, K. A. Lohse, W. McDowell, D. Richter, T. White (2015): A Guide Prepared By CZO PIs, May 05, 2015 Cross-CZO National


Common questions of the US NSF–supported Critical Zone Observatories. Dietrich, W.E. and Lohse, K. (2014): A Guide Prepared By CZO PIs Cross-CZO National


Graduate Research Group White Paper: Cross-CZO Research Potential. Harpold, A.A., D. Karwan, J. Perdrial, J.A. Marshall, J. Driscoll, A. Neal, and C. Phillips (2013): Internal CZO publication Cross-CZO National


Linkages between denitrification and organic matter quality, Boulder Creek Watershed, CO. Barnes, R.T., R.L. Smith, and G.R. Aiken (2012): Journal of Geophysical Research- VOL. 117, G01014, 14 PP



Chemistry of water, stream sediment, wildfire ash, soil, dust, and mine waste for Fourmile Creek Watershed, Colorado, 2010-2019. Murphy, S.F., McCleskey, R.B., D.A., Holloway, J.M., Writer, J.W., Martin, D.A., and Stricker, C.A. (2020): U.S. Geological Survey Data Releas

Wildfire-driven changes in hydrology mobilize arsenic and metals from legacy mine waste. Murphy, S.F., McCleskey, R.B., Martin, D.A., Holloway, J.M., and Writer, J.W., (2020): Science of the Total Environment v. 743, 140635

Atmospheric dust deposition varies by season and elevation in the Colorado Front Range, USA. Heindel, RC, Putman, AL, Murphy, SF, Repert, DA, and Hinckley, ES (2020): JGR-Earth Surface 125, e2019JF005436

Orographic controls on sub-daily rainfall statistics and flood frequency in the Colorado Front Range, USA . Rossi, MW, Anderson, RS, Anderson, SP (2020): Geophysical Research Letters 47, e2019GL085086,

Inorganic nitrogen wet deposition gradients in the Denver-Boulder metropolitan area and Colorado Front Range – Preliminary implications for Rocky Mountain National Park and interpolated deposition maps. Wetherbee, G., Benedict, K., Murphy, S., Elliott, E. (2019): Science of the Total Environment 691 (2019) 1027–1042

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Atmospheric dust deposition varies by season and elevation in the Colorado Front Range, USA. Heindel, RC, Putman, AL, Murphy, SF, Repert, DA, and Hinckley, ES (2020): JGR-Earth Surface 125, e2019JF005436

Boulder Creek Critical Zone Observatory Annual report 2019 . Anderson, S.P., Anderson, R.S., Molotch, N.P., Rajaram, H., Tucker, G.E. (2019): NSF Award #1331828

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Undergrad Theses

Spring of Gordon Gulch: A groundwater analysis . Heckman, C. (2012): Honors thesis, Environmental Studies, University of Colorado, 53 pp.

The Geochemical Impact of Wildfire and Mining on the Fourmile Creek Watershed, Colorado . Beganskas, S. (2012): Submitted to the Department of Geology of Amherst College in partial fulfillment of the requirements for the degree of Bachelor of Arts with honors.

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Examining the Role of Organic Compounds and Secondary Minerals on Ga/Al Fractionation in the Critical Zone. Justin B. Richardson*, Benjamin W. Kumpf, and Louis A. Derry (2018): Abstract 12c:345 presented at 2018 Goldschmidt Meeting, Boston, MA 12-17 August Cross-CZO

Multi-disciplinary Insights in to the Effects of Vegetation Change on Hydrologic Partitioning (Invited). Brooks, P.D., Barnard, H.R., Biederman, J.A., Harpold, A., Singha, K., Swetnam, T.L., Tai, X. (2018): Abstract H21A-06 presented at 2018 AGU Fall Meeting, Washington, D.C., 10-14 Dec Cross-CZO

Fostering Collaboration Across the US Critical Zone Observatories Network. Sharkey, S. and White, T. (2017): 2017 American Geophysical Union Fall Meeting, New Orleans, LA, 11-15 Dec Cross-CZO National

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Solifluction Lobes on Niwot Ridge: Using Drones, Time-lapse Cameras, and Weather Data to Study Periglacial Features . Dylan Lanka (2018): Senior honors thesis, Physical Geography, University of Colorado.

The response of streamflow and evapotranspiration to changes in snowmelt across the western United States. Barnhart, Theodore B. (2018): Ph.D. dissertation, Dept. of Geography, University of Colorado, Boulder.

Runoff generation in Betasso catchment: Investigation of Hortonian overland flow . Hammack, Garret (2017): Senior honors thesis, Physical Geography, University of Colorado.

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