B53H:
Characterizing Spatial and Temporal Variability of Hydrological and Biogeochemical Processes across Scales II


Session ID#: 7474

Session Description:
Biogeochemical processes are often spatially discrete (hotspots) and temporally restricted (hot moments) due to variability in controlling factors like hydrologic fluxes, lithologic characteristics, microbial composition, vegetation, etc. Although this scale-dependence of biogeochemical processes accounts for a high percentage of nutrient cycling, the ability to identify and incorporate them into reactive transport models remains a significant challenge. This session invites contributions that identify spatial and temporal patterns in biogeochemical variables, implement such variability in reactive transport models, and/or document the extent that hot spots/moments influence larger-scale system functioning. This session will focus on exchanging ideas on (1) new techniques for identifying biogeochemical hotspots and hot moments across scales, (2) understanding the governing controls such as, soil-landscape features, flux-inputs, vegetation characteristics that leads to this emergent behavior, (3) incorporating this spatio-temporal variability in models and/or designing scale-aware parameterizations, and (4) quantifying the significance of  incorporating this emergent behavior in reactive transport models.
Primary Convener:  Bhavna Arora, Lawrence Berkeley National Laboratory, Earth and Environmental Sciences Area, Berkeley, CA, United States
Conveners:  Haruko M Wainwright, Lawrence Berkeley National Laboratory, Berkeley, CA, United States and Susan S. Hubbard, Oak Ridge National Laboratory, Oak Ridge, United States
Chairs:  Bhavna Arora, Lawrence Berkeley National Laboratory, Earth and Environmental Sciences Area, Berkeley, CA, United States and Haruko M Wainwright, Lawrence Berkeley National Laboratory, Berkeley, CA, United States
OSPA Liaison:  Haruko M Wainwright, Lawrence Berkeley National Laboratory, Berkeley, CA, United States
Index Terms:

0414 Biogeochemical cycles, processes, and modeling [BIOGEOSCIENCES]
0434 Data sets [BIOGEOSCIENCES]
3252 Spatial analysis [MATHEMATICAL GEOPHYSICS]
3270 Time series analysis [MATHEMATICAL GEOPHYSICS]

Abstracts Submitted to this Session:

Scaling Denitrification Fluxes from Cores to Catchments: Spatial and Temporal Controls (Invited) (59370)
Jonathan M Duncan1, Lawrence E Band1 and Peter M Groffman2, (1)Pennsylvania State University Main Campus, Ecosystem Science and Management, University Park, United States, (2)Cary Inst Ecosystem Studies, Millbrook, United States
Assessing Wetland Effects on Nitrogen Reduction within a Fluvial Network Perspective: A Combined Field and Modeling Approach (78285)
Amy T Hansen1, Jacques C Finlay1, Jonathan A. Czuba2, Christy Dolph1 and Efi Foufoula-Georgiou3, (1)University of Minnesota Twin Cities, Minneapolis, MN, United States, (2)Univ Minnesota, Minneapolis, MN, United States, (3)University of California Irvine, Department of Civil and Environmental Engineering, Irvine, CA, United States
The Role of Hyporheic Zones in Cycling of Carbon and Nitrogen (83073)
Dipankar Dwivedi1, Carl I Steefel1, Bhavna Arora1, Gautam Bisht2 and Kenneth Hurst Williams3, (1)Lawrence Berkeley National Laboratory, Earth and Environmental Sciences Area, Berkeley, CA, United States, (2)Pacific Northwest National Laboratory, Richland, United States, (3)Lawrence Berkeley National Laboratory, Berkeley, CA, United States
Biogeochemical Regimes in Intensively Managed Catchments: Confounding Complexity or Emerging Simplicity? (Invited) (83604)
Nandita B Basu, University of Waterloo, Department of Civil and Environmental Engineering, Waterloo, ON, Canada and Kimberly J Van Meter, University of Waterloo, Waterloo, ON, Canada
Importance of High-frequency Chemistry for Resolving Hot Moments in Headwaters: A Combined Optical Sensor and Time-series Modelling Approach (58552)
Timothy Jones1, Nick Arthur Chappell2, Wlodek Tych2 and Ravinder Singh Bhalla3, (1)University of Lancaster, Lancaster Environment Centre, Lancaster, United Kingdom, (2)University of Lancaster, Lancaster, United Kingdom, (3)Foundation for Ecological Research, Advocacy and Learning, Auroville, India
Biofilm development in a hotspot of mixing between shallow and deep groundwater in a fractured aquifer: field evidence from joint flow, chemical and microbiological measurements (81419)
Olivier Bochet1,2, Alexis Dufresne3, Mathieu Pédrot4, Eliot Chatton4, Thierry Labasque4, Sarah Ben Maamar4, Luc Burté5, Jérôme de La Bernardie6, Nicolas Guihéneuf7, Nicolas Lavenant8, Christophe Petton9, Olivier Bour6, Luc Aquilina10 and Tanguy Le Borgne4, (1)University of Rennes, Rennes Cedex, France, (2)University of Rennes 1 / ADEME, Géosciences Rennes UMR 6118, Rennes, France, (3)CNRS, Ecobio UMR 6553, Rennes, France, (4)University of Rennes 1, Géosciences Rennes UMR 6118, Rennes, France, (5)University of Rennes 1 / ANTEA GROUP, Géosciences Rennes UMR 6118, Rennes, France, (6)Univ Rennes, CNRS, Géosciences Rennes, UMR 6118, Rennes, France, (7)Géosciences Rennes, Rennes, France, (8)Geosciences Rennes, CNRS, Rennes Cedex, France, (9)Univ Rennes, CNRS, Géosciences Rennes – UMR 6118, Rennes, France, (10)UMR CNRS 6118, University of Rennes 1, Géosciences Rennes, Rennes, France
Microbial facies distribution and its geological and geochemical controls at the Hanford 300 area (81840)
Zhangshuan Hou1, William C Nelson2, James Stegen3, Christopher J Murray2 and Evan Arntzen4, (1)Pacific Northwest National Laboratory, Energy and Environment Directorate, Richland, WA, United States, (2)Pacific Northwest National Laboratory, Richland, WA, United States, (3)Pacific Northwest National Laboratory, Richland, United States, (4)Pacific Northwest National Lab, Richland, WA, United States
CO2 production rate maxima in the deeper unsaturated zone of a semi-arid floodplain at Rifle, Colorado (83430)
Tetsu K Tokunaga1, Yongman Kim2, Jiamin Wan1, Wenming Dong3, Mark E Conrad4, Markus Bill5, Chad Hobson2, Kenneth Hurst Williams1 and Philip E Long6, (1)Lawrence Berkeley National Laboratory, Berkeley, CA, United States, (2)Lawrence Berkeley National Laboratory, Earth Science Divission, Berkeley, CA, United States, (3)Lawrence Berkeley National Laboratory, Energy Geoscience Division, Berkeley, United States, (4)Lawrence Berkeley National Laboratory, Earth and Environmental Sciences Area, Berkeley, United States, (5)Lawrence Berkeley National Laboratory, Earth and Environmental Sciences Area, Berkeley, CA, United States, (6)Lawrence Berkeley National Lab, Chelan, WA, United States

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