Carleton Bern, PhD

I am a research soil scientist with the U.S. Geological Survey in the Colorado Water Science Center. My research examines the geochemical interactions between water, rock, and soil. Water quality in relation to agriculture, mining, and hydrocarbon extraction is the focus of my current projects. I am also developing novel modeling approaches to trace the influence of colloids on soil development.





Ph.D.     Ecology and Evolutionary Biology University of Colorado, Boulder, CO                                      2006

B.S.        Biology, Virginia Tech, Blacksburg, VA                                                                                     1996



Professional Experience

Research Soil Scientist, U.S. Geological Survey                                                                    2010-present

Mendenhall Postdoctoral Fellow, U.S. Geological Survey                                                      2008-2010

Post-doctoral Researcher, University of California, Santa Barbara                                        2006-2008

Biologist, Stable Isotope Laboratory, U.S. Geological Survey                                                  2004-2006

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Selected Publications:

Bern, C.R., Yesavage, T. 2018. Dual-phase mass balance modeling of small mineral particle losses from sedimentary rock-derived soils. Chemical Geology.

Bern, C.R. and Stogner, R.W. Sr. 2017. The Niobrara Formation as a challenge to water quality in the Arkansas River, Colorado, USA. Journal of Hydrology: Regional Studies. (Open access)

Bern, C.R., T. Yesavage, and N.K. Foley. 2017. Ion-adsorption REEs in regolith of the Liberty Hill pluton, South Carolina, USA: An effect of hydrothermal alteration. Journal of Geochemical Exploration 172:29-40,

Bern,C.R., Shah, A.K., Benzel, W.M., Lowers, H.A. 2016. The distribution and composition of REE-bearing minerals in placers of the Atlantic and Gulf coastal plains, USA. Journal of Geochemical Exploration.

Bern, C.R., Thompson, A., Chadwick, O.A. 2015. Quantification of colloidal and aqueous element transfer in soils: The dual-phase mass balance model. Geochimica et Cosmochimica Acta.

Bern, C.R., Clark, M.L., Schmidt, T.S., Holloway, J.M., McDougal, R.R., 2015. Soil disturbance as a driver of increased stream salinity in a semiarid watershed undergoing energy development.Journal of Hydrology, 524: 123-136,

Bern C.R., Breit, G.N., Healy, R.W., Zupancic, J., Hammack. R. 2013 Deep subsurface drip irrigation using coal-bed sodic water: Part I. Water and solute movement. Agricultural Water Management.

Bern C.R., Breit, G.N., Healy, R.W., Zupancic, J. 2013. Deep subsurface drip irrigation using coal-bed sodic water: Part II. Geochemistry. Agricultural Water Management.

Bern, C.R., Chadwick, O.A., Hartshorn, A.S., Khomo, L.M., Chorover, J. 2011. A mass-balance model to separate and quantify colloidal and solute redistributions in soil. Chemical Geology.

Bern, C.R., Brzezinski, M.A. Beucher, C., Ziegler, K., and Chadwick, O.A. 2010. Weathering, dust and biocycling effects on soil silicon isotope ratios. Geochimica et Cosmochimica Acta.

Bern, C. R. 2009. Soil chemistry in lithologically diverse datasets: The quartz dilution effect. Applied Geochemistry, 24: 1429-1437,

Bern, C. R., A. R. Townsend, and G. L. Farmer. 2005. Dominance of parent-material strontium in a tropical forest on highly weathered soils. Ecology 86(3): 626-632.