Current Research: Our interdisciplinary team works collaboratively at the Susquehanna-Shale Hills CZO to advance methods for characterizing regolith, to provide a theoretical basis for predicting the distribution, properties and evolution of regolith, and to theoretically and experimentally study the impacts of regolith on fluid pathways, flow rates, solute residence times, and response to climate change.
Climate and Hydrometeorology: This research focuses on investigation of explicit coupling and feedback for subsurface-landsurface-atmosphere interaction using fully coupled models over meteorologic and climatic time scales. A long history of hydrologic research at the site has stimulated reanalysis research to reprocess and assimilate observational data collected during experimental campaigns conducted over a 40+ year span, into an integrated watershed reanalysis product.
Weathering: Weathering fronts, mineral transformation reactions, and long-term physical-chemical weathering fluxes are elucidating the important physical, biological and hydrogeochemical processes that operate within this shale dominated catchment.
Hydropedology: Using a suite of non-invasive imaging techniques (X-ray tomography, ground penetrating radar, and electromagnetic induction) in combination with real-time soil monitoring we are able to detect and model subsurface flow networks and their dynamics.
Ecological Research: In this study patterns of tree water use and water availability across the watershed influence trees at the physiological, community and evolutionary time scales; and how a temperate forest affects water, energy and weathering rates.
Stable Isotope Hydrology: The stable isotope network takes a comprehensive approach to determine space-time signatures in all stores of the watershed and to elucidate fluid pathways and time scales from source to sink.
Watershed Modeling: The stable isotope network is also being used to evaluate the “age” and residence times of stable isotopes at Shale Hills as part of an integrated hydrodynamic model for water, solutes and sediments. The Penn State Integrated Hydrologic Model for water and energy budgets has been implemented at Shale Hills and the sediment transport and solute transport are in final stages of completion. A landscape evolution model is planned for implementation in year 5.
Soil Biogeochemistry: This research focuses on quantification of soil respiration rates and investigation of how water movement/storage and soil texture lead to variability in soil-atmosphere CO2 exchange.
Geomorphology: Sediment erosion, transport, and deposition are being incorporated into the Penn State Integrated Hydrologic Model. Efforts include development of a hillslope sediment flux model that incorporates tree-throw and freeze-thaw creep.
Hydrogeophysics: In field-scale and lab-scale tracer tests both soils and shale material show preferential pathways that may be indicative of dual-domain solute transport behavior.
21 Apr 2017 - AGU has published a collection of commentaries highlighting the important role Earth and space science research plays in society.
06 Apr 2017 - 2017 CZO Webinar Series: Critical Zone and Society.
26 Sep 2016 - Get a sense of the people and the work. Several members of the Shale Hills CZO are profiled here, including students and professors.
30 Jun 2017 - Over two days, the catena in Garner Run was home base for the Rutgers 2017 Hydrogeophysics Workshop. Faculty, graduate students, and three...
25 May 2017 - Joanmarie Del Vecchio, MS Candidate in Geosciences, delivered an engaging public presentation on her thesis research "A Record of Coupled Hillslope...
25 Apr 2017 - Ismaiel Szink, Doctoral Candidate in the intercollege graduate degree program ecology, has been awarded the prestigious National Science Foundation...
21 Mar 2017 - Twelve of the fifteen TeenShale high school students from State High traveled to Pittsburgh, PA and presented results from the ongoing multi-year...
22 Nov 2016 - CZOs at AGU 2016: Agenda and award recipients
Geochemical evolution of the Critical Zone across variable time scales informs concentration-discharge relationships: Jemez River Basin Critical Zone Observatory. McIntosh J.C., Schaumberg C., Perdrial J., Harpold A., Vázquez-Ortega A., Rasmussen C., Vinson D., Zapata-Rios X., Brooks P.D., Meixner T., Pelletier J., Derry L., Chorover J. (2017): Water Resources Research 53(5): 4169–4196 Cross-CZO National
Enhancing Interoperability and Capabilities of Earth Science Data using the Observations Data Model 2 (ODM2). Hsu, Leslie, Emilio Mayorga, Jeffery S. Horsburgh, Megan R. Carter, Kerstin A. Lehnert and Susan L. Brantley (2017): Data Science Journal, 16: 4, pp. 1–16 Cross-CZO National
Expanding the role of reactive transport models in critical zone processes. Li Li, Kate Maher, Alexis Navarre-Sitchler, Jenny Druhan, Christof Meile, Corey Lawrence, Joel Moore, Julia Perdrial, Pamela Sullivan, Aaron Thompson, Lixin Jin, Edward W. 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
Variability in aboveground carbon dynamics driven by slope aspect and curvature in an eastern deciduous forest, USA. Smith, L., Eissenstat, D., and Kaye, M. (2017): Canadian Journal of Forest Research, vol. 47: 149–158
Controls on deep critical zone architecture: a historical review and four testable hypotheses. Riebe, C. S., Hahm, W. J., Brantley, S. L. (2017): Earth Surface Processes and Landforms, 42 (1): 128–156 Cross-CZO National
Variation of organic matter quantity and quality in streams at Critical Zone Observatory watersheds. Miller, Matthew P., Boyer, Elizabeth W., McKnight, Diane M., Brown, Michael G., Gabor, Rachel S., Hunsaker, Carolyn T., Iavorivska, Lidiia, Inamdar, Shreeram, Johnson, Dale W., Kaplan, Louis A., Lin, Henry, McDowell, William H., Perdrial, Julia N. (2016): Water Resources Research, 52 (10): 8202–8216 Cross-CZO
Designing a suite of measurements to understand the critical zone. Brantley, S. L., DiBiase, R. A., Russo, T. A., Shi, Y., Lin, H., Davis, K. J., Kaye, M., Hill, L., Kaye, J., Eissenstat, D. M., Hoagland, B., Dere, A. L., Neal, A. L., Brubaker, K. M., and Arthur, D. K (2016): Earth Surface Dynamics 4: 211-235
Fully-Coupled Hydrologic Processes for Modeling Landscape Evolution. Zhang, Y., R. Slingerland, and C. Duffy (2016): Environmental Modelling & Software, 82:89-107
Mineralogical Transformations and Soil Development in Shale across a Latitudinal Climosequence. Dere Ashlee L., Timothy S. White, Richard April, and Susan L. Brantley (2016): Soil Science Society of America, 80:623–636
Variability of dissolved organic carbon in precipitation during storms at the Shale Hills Critical Zone Observatory. Iavorivska, Lidiia, Boyer, Elizabeth W., Grimm, Jeffrey W., Miller, Matthew P., DeWalle, David R., Davis, Kenneth J., and Kaye, Margot W. (2017): Hydrological Processes, 31(16):2935–2950
Spatial patterns of tree and shrub biomass in a deciduous forest using leaf-off and leaf-on LiDAR. Brubaker Kristen M., Johnson Quincey K., and Kaye Margot W. (2017): Canadian Journal of Forest Research (submitted)
Root morphology and mycorrhizal type strongly influence root production in nutrient hot spots of mixed forests . Chen W, Koide RT, Eissenstat DM (2017): Journal of Ecology
Designing a network of critical zone observatories to explore the living skin of the terrestrial Earth. Brantley, S.L., McDowell, W.H., Dietrich, W.E., White, T.S., Kumar, P., Anderson, S., Chorover, J., Lohse, K.A., Bales, R.C., Richter, D., Grant, G., and Gaillardet, J. (2017): Earth Surface Dynamics Cross-CZO National
Hyporheic zone influences on concentration-discharge relationships in a headwater sandstone stream. Hoagland, Beth, Russo, Tess A., Gu, Xin, Hill, Lillian, Kaye, Jason, Forsythe, Brandon, and Brantley, Susan L. (2017): Water Resources Research, 53(6):4643–4667
Reviews and syntheses: On the roles trees play in building and plumbing the Critical Zone. Brantley, Susan L., David M. Eissenstat, Jill A. Marshall, Sarah E. Godsey, Zsuzsanna Balogh-Brunstad, Diana L. Karwan, Shirley A. Papuga, Joshua Roering, Todd E. Dawson, Jaivime Evaristo, Oliver Chadwick, Jeffrey J. McDonnell, Kathleen C. Weathers (2017): Biogeosciences Discussions Cross-CZO National
Cosmogenic 10Be indicates that periglacial boulder fields are ancient, multigenerational features. Denn, Alison R., Bierman, Paul R., Kirby, Eric, Zimmerman, Susan R. H., and Caffee, Marc W. (2017): GSA Today (submitted)