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Caitlin Hodges

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Caitlin Hodges

Brett Carpenter

Ph.D., 2021 Soil Science and Biogeochemistry – Pennsylvania State University
M.S., 2017 Ecology – University of Georgia
B.S.E.S. 2014 Water and Soil Resources – University of Georgia

Office: 834 SEC

Caitlin Hodges CV (pdf)

Faculty Page


My research focuses on the interface between soil science and biogeochemistry. I pursue fundamental research in soil carbon cycle- mineral weathering feedbacks and redox cycling in upland soils. I am particularly fascinated by low-oxygen processes in well-drained upland soils. I use this fundamental research on soils to understand the role soils play in modulating the global carbon cycle and terrestrial inputs (pollutant fertilizers, heavy metals, etc.) to surface waters.

I use both manipulated laboratory experiments and in situ monitoring of instrumented watersheds to pursue my research questions.

Areas of Interest

Soil weathering, soil carbon cycle, iron and manganese redox, mineral organic carbon associations, low oxygen processes in soils, interpretation of soil CO2 and O2 concentrations

Courses Taught

GEOL 5970 – Biogeochemistry of the Critical Zone

GEOL 1114 – Introduction to Physical Geology

Selected Publications

Hodges, C., N. Carpenter, B. Forsythe, S.L. Brantley, J. Kaye. Accepted, 2021. Carbon dioxide flux partitioning in a calcareous watershed with agricultural impacts. Journal of Geophysical Research: Biogeosciences.

Kaye, J. P., Brantley, S. L., Zan Williams, J., and the SSHCZO team. Proposed Best Practices for Collaboration at Cross-disciplinary Observatories. 2019. Biogeosciences Discussions.

Hodges, C., H. Kim, S. L. Brantley, J. Kaye. 2019. Soil CO2 and O2 concentrations illuminate the relative importance of weathering and respiration to seasonal soil gas fluctuations. Soil Science Society of America Journal. doi: 10.2136/sssaj2019.02.0049

Hodges, C., J. Mallard, D. Markewitz, A. Thompson. 2019. Seasonal and spatial variability of iron reduction in the soils of the Southeastern Piedmont of the US. Catena. doi: 10.1016/j.catena.2019.03.026

Hodges, C., E. King, J. C. Pett-Ridge, A. Thompson. 2018. Potential for iron reduction increases with rainfall in Montane Baslatic Soils of Hawaii. Soil Science Society of America Journal. doi:10.2136/sssaj2017.06.0193

King, E., A. Thompson, C. Hodges, J. C. Pett-Ridge. 2014. Towards understanding temporal and spatial patterns of molybdenum in the critical zone. Proceedings of the tenth Geochemistry of the Earth’s Surface Conference. doi: 10.1016/j.proeps.2014.08.011