The 2017 AGU Fall Meeting will be held at the New Orleans Ernest N. Morial Convention Center in New Orleans, Louisiana on December 11-15, 2017.
Consider submitting an abstract to the sessions listed below related to Critical Zone science! Abstract submission deadline: August 2
CZ-related AGU Sessions:
Session ID#: 24933
Session Description: The critical zone (CZ) – Earth's permeable veneer from the tops of trees to the bottom of groundwater aquifers – is a constantly evolving layer where rock, soil, water, air, and living organisms interact, regulating habitats and determining the availability of life-sustaining resources, including food production and water quality. Like an elaborate piece of industrial machinery, plants build the CZ by altering the physical architecture and chemistry of the subsurface. Like a complex network of pipes, plants plumb the CZ by impacting reservoirs and pathways of water and nutrients. We solicit contributions that explore plants’ effects on the CZ and the CZ’s effects on plants. We are interested in abstracts contributing to understanding the evolving relationships of plants and the CZ over multiple timescales: (1) complex plant-CZ relationships that regulate the flows of energy, water, carbon and nutrients and (2) how plant-CZ interactions and organization shape landscapes and sculpt soils.
Primary Convener: Jaivime A Evaristo, University of Saskatchewan, Saskatoon, SK, Canada
Conveners: Shirley A Papuga, University of Arizona, Tucson, AZ, United States, Diana L Karwan, University of Minnesota Twin Cities, Minneapolis, MN, United States and Kathleen A Lohse, Idaho State University, Biological Sciences, Pocatello, ID, United States
Session ID#: 23702
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, Tucson, AZ, United States
Conveners: Jerome Gaillardet, Institut de Physique du Globe de Paris, Paris, France, William H McDowell, University of New Hampshire Main Campus, Durham, NH, United States and Jennifer L Druhan, University of Illinois at Urbana Champaign, Urbana, IL, United States
Session ID#: 25010
Session Description: Extending from the bottom of the weathered bedrock to the top of canopy, the critical zone as a whole harbors many hydrological stores and pathways relevant to earth system functioning at sub-decadal time scales. This multi-layered “living skin of the Earth” is highly heterogeneous both horizontally and vertically; scaling up local insights into an integrated mechanistic understanding of this interface between the atmosphere, the oceans and Earth’s interior remains challenging. This session collects contributions using modelling- and/or measurement-based analyses spanning local-to-global scales to 1) quantify hydrological fluxes and residence times within the critical zone, and 2) provide insights into couplings and feedbacks with climate seasonal dynamics and short-term variability, ecosystem functioning, and geochemical cycling.
Primary Convener: Sylvain Kuppel, University of Aberdeen, Aberdeen, United Kingdom
Conveners: Scott Jasechko, University of Calgary, Geography, Calgary, AB, Canada, Gonzalo Miguez-Macho, University of Santiago de Compostela, Santiago de Compostela, Spain and Kaiyu Guan, University of Illinois at Urbana Champaign, Department of Natural Resources and Environmental Sciences, Urbana, IL, United States
Session ID#: 23400
Session Description: The Critical Zone (CZ) is the Earth’s skin where climate, geology, ecosystems, and human activities converge. The evolution and function of the CZ are governed by multiple processes (e.g., meteorological, hydrological, geochemical, geomorphological, and biological) over a wide range of temporal and spatial scales. This session aims to showcase contributions that highlight recent model development and applications to develop a predictive understanding of CZ. We invite abstracts that: 1) demonstrate the synergy between field and modeling efforts; 2) elucidate underlying processes at and across multiple scales; 3) reveal new understanding about the CZ response to changing climate and land use; and 4) synthesize data or test hypotheses across multiple study sites. The session is intended to serve as an exploration of the breadth of CZ sciences and to facilitate comparison across different sites. We encourage submissions from modeling endeavors within and across disciplines.
Primary Convener: Li Li, Pennsylvania State University Main Campus, University Park, PA, United States
Conveners: Harry Vereecken, Forschungszentrum Julich GmbH, Julich, Germany, Praveen Kumar, University of Illinois at Urbana Champaign, Urbana, IL, United States and Bhavna Arora, Lawrence Berkeley National Laboratory, Berkeley, CA, United States
Session ID#: 26021
Session Description: Over a decade of Critical Zone research suggests that landscape evolution is controlled by processes ranging from tectonic forces to energy fluxes associated with solar radiation and precipitation. These processes drive the generation of porosity through fracturing, mineral dissolution, and bioturbation. Porosity is essential to many life sustaining features of the critical zone and functions to provide organisms access to key nutrients, pathways for throughflow of meteoric and subsurface water, exposes surface area for chemical dissolution and mineral weathering, and allows for the entrainment and transport of particulates. Variations in porosity dictate critical zone architecture both spatially (vertically and laterally) and temporally. Our session aims to bring together a cross section of scientists working to integrate measurements from geophysics, geochemistry, hydrology, and ecology to elucidate porosity structure in the critical zone, and its correlation with physical, chemical, and biological processes.
Primary Convener: Nicole West, Central Michigan University, Mount Pleasant, MI, United States
Conveners: Jorden L Hayes, Dickinson College, Department of Earth Sciences, Carlisle, PA, United States and Jason Austin, University of Georgia, Athens, GA, United States
Session ID#: 25314
Session Description: Effective research in the geosciences requires a combination of discovering, analyzing, managing, and publishing data. Community platforms and data tools are being developed to aid researchers, students, and educators in accomplishing these tasks so that they can better focus their efforts on addressing current scientific issues. Many tools are available online and can be accessed through services, thus creating Virtual Research Environments that enhance the sharing of data and tools. We solicit contributions that discuss successes and challenges in developing tools, applications, and platforms that enable data discovery, data sharing and publishing, and data management to support the next generation of research in geosciences.
Primary Convener: Liza Brazil, Consortium of Universities for the Advancement of Hydrological Science, Washington, DC, United States
Conveners: Megan Carter, Columbia University of New York, Palisades, NY, United States, Jon Pollak, Consortium of Universities for the Advancement of Hydrological Science, Washington, DC, United States and Michelle Hall, Science Education Solutions, Los Alamos, NM, United States
Session ID#: 25667
Session Description: As technology continues to advance, our ability to image earth’s critical zone only increases. One of the newest tools available for collecting spatially explicit data are unmanned aerial vehicles (UAVs), also known as drones. UAVs are unique tools that offer reliable data collection at high spatial resolutions. They can provide insight into the spatial heterogeneities in vegetation, land use, and surface waters, and critical zone processes, and help ground truth results of water system models. This session invites contributions that explore the use of UAVs in advancing our understanding of critical zone hydrology. Contributions on types of UAVs, data collection techniques, inferring hydrological processes from UAV data, and use of UAVs to run or refine numerical models are particularly encouraged.
Primary Convener: Christa Kelleher, Syracuse University, Syracuse, NY, United States
Conveners: Anna Coles, University of Saskatchewan, Saskatoon, SK, Canada and Christine E. Hatch, University of Massachusetts Amherst, Department of Geosciences, Amherst, MA, United States
Session ID#: 26088
Session Description: Shale comprises 25% of earth's surface and yet its chemical, mechanical, physical, and transport properties are only poorly understood. A transformation in our understanding of this important lithology is ongoing, largely driven by the shale gas revolution and new critical zone science initiatives. This session will highlight presentations about all aspects of shale spanning from studies at depth related to fracking and horizontal drilling to studies at or near earth's surface related to shales as aquicludes, shales in the critical zone, and shales as hosts for microbiological ecosystems.
Primary Convener: Susan L Brantley, Pennsylvania State University Main Campus, Department of Geosciences, University Park, PA, United States
Conveners: Carl I Steefel, Lawrence Berkeley National Laboratory, Berkeley, CA, United States, Xin Gu, Pennsylvania State University Main Campus, University Park, PA, United States and Qingyun Li, Stanford University, Department of Geological Sciences, Stanford, CA, United States
Session ID#: 29367
Session Description: Land-use and land cover change have the potential to drastically alter the hydrologic cycle and alter the spatiotemporal movements of water resources. The emerging challenges of land system changes from a natural resource perspective are (1) Observing/estimating land-use and land-cover change and (2) Quantifying/predicting subsequent hydrologic impacts. This session invites submissions that use emerging geospatial techniques such as remote sensing, modeling, assimilation of observed vegetation characteristics, and in situ observations like isotopes. Studies are welcomed that quantify hydrologically-relevant landscape change and/or examine land-use and land-cover impacts on: (i) Regional water balance/water resource change; (ii) groundwater resources/groundwater-surface water interactions; (iii) Subsurface-land-atmosphere feedbacks; (iv) Regional climate/drought characteristics; (v) Hydro-chemical fluxes and nutrient cycling. We also welcome studies exploring disturbance from natural versus anthropogenic sources and those dealing with uncertainty in selection of land cover datasets, statistical methods, or numerical modeling.
Primary Convener: Ben Livneh, Cooperative Institute for Research in Environmental Sciences, Boulder, CO, United States
Conveners: Samuel Carl Zipper, McGill University, Earth & Planetary Sciences, Montreal, QC, Canada, Shraddhanand Shukla, University of California Santa Barbara, Santa Barbara, CA, United States and Laura E Condon, Syracuse University, Civil and Environmental Engineering, Syracuse, NY, United States
Session ID#: 25520
Session Description: Microbes play critical roles regulating biogeochemical cycles. Linking processes controlling nutrient transformation and storage with disturbance responses and feedbacks to climate change is a global research priority. Studies that integrate biogeochemical approaches focused on nutrient pools and fluxes with microbial ecology approaches examining community physiology, traits, and structure reveal the complexity of interactions influencing ecosystem responses. How do individual microbial traits influence community stability and response to disturbances? How does microbial community structure change across gradients and influence vegetation dynamics? How can we use this information to predict large-scale fluctuations in soil carbon and nutrient storage? Although advances in molecular and genetic tools are improving our understanding of how microbial processes influence ecosystem scale cycles, questions surrounding the level of detail appropriate to best predict environmental response to change remain. We invite cross-disciplinary studies that investigate microbial-driven responses along environmental gradients, to disturbance, and/or in the context of climate change.
Primary Convener: Martha Gebhardt, University of Arizona, Tucson, AZ, United States
Conveners: Noelle J Espinosa1, Dawson Fairbanks2 and Rachel E Gallery2, (1)University of Arizona, Tucson, AZ, United States (2)University of Arizona, Soil, Water and Environmental Science, Tucson, AZ, United States