B54A:
Concentration-Discharge Relations in the Critical Zone II

Submit an Abstract to this Session



Session ID#: 31856

Session Description:
Process-level prediction of critical zone (CZ) structure and long-term evolution depends on an improved understanding of how hydrologic flows and biogeochemical reactions are coupled on the incremental time scale of hydrologic events. Hydro-bio-geochemical couplings can be inferred from solute releases measured down-gradient of reactive flow paths. These flow paths have variable lengths, compositions, and residence times, and their mixing is reflected in concentration-discharge (C-Q) relations. We invite contributions that seek to resolve mechanisms operating within the CZ (from canopy to bedrock) that control down-gradient C-Q behavior. Focus of the session spans the full range of rock-derived and bio-active solutes, including dissolved, gaseous and colloidal species that may co-occur for a given element. Papers that incorporate observations of internal catchment function (e.g., dynamic relations among hydrology and (bio)geochemistry in various CZ locations) to interpret controls over integrated C/Q response are especially encouraged.
Primary Convener:  Jon Chorover, University of Arizona, Department of Environmental Science, Tucson, United States
Conveners:  Jerome Gaillardet, Institut de Physique du Globe de Paris, Paris, France, William H McDowell, University of New Hampshire Main Campus, Natural Resources and the Environment, Durham, NH, United States and Jennifer L Druhan, University of Illinois at Urbana-Champaign, Urbana, United States
Chairs:  Jon Chorover, University of Arizona, Department of Environmental Science, Tucson, United States and Jennifer L Druhan, University of Illinois at Urbana-Champaign, Urbana, United States
OSPA Liaison:  Jon Chorover, University of Arizona, Department of Environmental Science, Tucson, United States

Cross-Listed:
  • H - Hydrology
Index Terms:

0414 Biogeochemical cycles, processes, and modeling [BIOGEOSCIENCES]
0486 Soils/pedology [BIOGEOSCIENCES]
1804 Catchment [HYDROLOGY]
1806 Chemistry of fresh water [HYDROLOGY]

Abstracts Submitted to this Session:

River mixing as a driver of concentration-discharge relationships: the example of the Amazon River (Invited) (228561)
Mr. Julien Bouchez, PhD1, Jean-Sebastien Moquet1, Jhan Carlo Espinoza2, Jean_Michel Martinez3, Jean-Loup Guyot Sr.4 and Naziano Filizola5, (1)Institut de Physique du Globe de Paris, Paris, France, (2)Instituto Geofísico del Perú, Lima, Peru, (3)Institut de Recherche pour le Développement (IRD), CNRS, UPS, CNES, Laboratoire GET, Toulouse, France, (4)Institut de Recherche pour le Developpement Lima, GET, Lima, Peru, (5)Universidade Federal do Amazonas, Manaus, Brazil
Perennial flow through convergent hillslopes explains chemodynamic solute behavior in a shale headwater catchment (231570)
Elizabeth Herndon, Oak Ridge National Laboratory, Environmental Sciences Division, Oak Ridge, United States, Grit Steinhoefel, Alfred Wegener Institute Helmholtz-Center for Polar and Marine Research, Bremerhaven, Germany, Ashlee Laura Denton Dere, University of Nebraska at Omaha, Geography/Geology, Omaha, NE, United States and Pamela L Sullivan, Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, OR, United States
Cross-site comparisons of concentration-discharge relationships reveal climate-driven chemostatic set points (242257)
Sarah Godsey, Idaho State University, Geosciences, Idaho Falls, ID, United States and James W Kirchner, ETH Swiss Federal Institute of Technology Zurich, Department of Environmental Systems Science, Zurich, Switzerland
Thermodynamic Cconstraints on Coupled Carbonate-Pyrite Weathering Dynamics and Carbon Fluxes (Invited) (245147)
Matthew Winnick, Stanford University, Stanford, CA, United States and Katharine Maher, Stanford University, Earth System Science, Stanford, CA, United States
Long-Term Patterns in C-Q Relations in an Adirondack Stream Reveal Decreasing Severity of Episodic Acidification (284177)
Douglas A Burns1, Gregory Brad Lawrence2, Charles T Driscoll3, Timothy J Sullivan4, Shuai Shao5 and Todd C McDonnell4, (1)US Geological Survey, New York Water Science Center Troy, Troy, United States, (2)US Geological Survey, Troy, NY, United States, (3)Syracuse University, Department of Civil & Environmental Engineering, Syracuse, NY, United States, (4)E&S Environmental Chemistry, Corvallis, OR, United States, (5)Syracuse University, Syracuse, NY, United States
Mechanisms Generating Chemostatic Si-discharge Relationships in Granitoid Catchments of the Critical Zone Network (291724)
Arnulfo Andrés Aguirre, Cornell University, Department of Earth and Atmospheric Sciences, Ithaca, NY, United States and Louis A Derry, Institut de Physique du Globe de Paris, Paris, France

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