MG31A:
Physical and Biogeochemical Processes at the Sediment-Water Interface in Estuaries, Coastal Oceans, and Shelf Seas I


Session ID#: 11354

Session Description:
Benthic processes and the resulting fluxes at the sediment-water interface are highly significant in the shallow waters that characterize estuaries, coastal oceans and shelf seas. Many physical and biogeochemical processes influence benthic-pelagic exchange, and near-bed fluxes and transport of sediments, nutrients, carbon and other bioactive solutes. Sediment resuspension and bed reworking by tides, waves, and biological activity are frequent in the energetic coastal environments considered. Dissolved material can be exchanged by diffusive and pumped/advective processes. The interactions between the flows and large and small scale seafloor morphology are complex and can modify flux rates. Particulate matter settles and accumulates in an unconsolidated fluff layer easily remobilised by bottom currents. Our understanding of these processes nevertheless remains limited to date, and fully elucidating the benthic-pelagic exchanges requires approaches encompassing biology, chemistry, physics, and the interactions and feedbacks between them. This session seeks contributions across these disciplines which directly address processes affecting cycling and fluxes at the sediment-water interface and in the near-bed boundary layer in estuaries, coastal oceans and shelf seas. This session will welcome studies based on in-situ observations, laboratory experiments, and modelling either resolving or parameterizing processes.
Primary Chair:  Laurent Amoudry, National Oceanography Centre, Liverpool, United Kingdom
Chairs:  Gary R Fones, University of Portsmouth, Portsmouth, PO1, United Kingdom, Tian-Jian Hsu, University of Delaware, Newark, DE, United States, Peter Traykovski, Woods Hole Oceanograph Inst, Falmouth, MA, United States, Nina Stark, Virginia Polytechnic Institute and State University, Blacksburg, VA, United States, Malay Ghose Hajra, University of New Orleans, Civil and Environmental Engineering, New Orleans, LA, United States, Christian Maerz, Newcastle University, Tyne and Wear, United Kingdom and Natascha Riedinger, Oklahoma State University Main Campus, Boone Pickens School of Geology, Stillwater, OK, United States
Moderators:  Laurent Amoudry, National Oceanography Centre, Liverpool, United Kingdom, Sarah Reynolds, University of Portsmouth, School of Earth & Environmental Sciences, Portsmouth, United Kingdom, Natascha Riedinger, Oklahoma State University Main Campus, Boone Pickens School of Geology, Stillwater, OK, United States and Peter Traykovski, Woods Hole Oceanographic Institution, Applied Ocean Physics and Engineering, Woods Hole, MA, United States
Student Paper Review Liaison:  Natascha Riedinger, Oklahoma State University Main Campus, Boone Pickens School of Geology, Stillwater, OK, United States
Index Terms:

4211 Benthic boundary layers [OCEANOGRAPHY: GENERAL]
4273 Physical and biogeochemical interactions [OCEANOGRAPHY: GENERAL]
4558 Sediment transport [OCEANOGRAPHY: PHYSICAL]
4805 Biogeochemical cycles, processes, and modeling [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
Co-Sponsor(s):
  • B - Biogeochemistry and Nutrients
  • ME - Marine Ecosystems
  • TP - Turbulent Processes

Abstracts Submitted to this Session:

Importance of Microbial Iron Reduction in River-Dominated Continental Margin Sediments (91488)
Martial Taillefert1, Jordon Scott Beckler2,3, Eryn Melissa Eitel1, Shannon Marie Owings4, Joel D Craig5, Ben Fields5, Cecile Cathalot6, Jens Rassmann7, Bruno Bombled7, Rudolph Corvaisier8, Panagiotis Michalopoulos9, Donald B Nuzzio10 and Christophe Rabouille7, (1)Georgia Institute of Technology, School of Earth and Atmospheric Sciences, Atlanta, GA, United States, (2)Mote Laboratory, Ocean Technology Research, Sarasota, FL, United States, (3)Mote Marine Laboratory, Ocean Technology group, Sarasota, FL, United States, (4)Georgia Institue of Technology, School of Earth and Atmospheric Sciences, Atlanta, GA, United States, (5)Georgia Institue of Technology, School of Earth and Atmospheric Sciences, Atlanta, United States, (6)IFREMER, REM/GM/LCG, Plouzané, France, (7)Laboratoire des Sciences du Climat et de l'Environnement, UMR CEA-CNRS-UVSQ et IPSL, Gif sur Yvette, France, (8)CNRS-UBO, Institut Universitaire Europeen de la Mer, Laboratoire des Sciences de l’Environnement Marin, Plousane, France, (9)Hellenic Center for Marine Research, Anavyssos, Greece, (10)Analytical Instrument Systems, Inc., Flemington, NJ, United States
Organic Matter Sulfurization in the Water Column and Its Effect on Sedimentary Processes (89241)
Morgan R Raven1, Alex L Sessions1, Jess F Adkins1 and Robert Thunell2, (1)California Institute of Technology, Pasadena, CA, United States, (2)University of South Carolina Columbia, School of Earth, Ocean and Environment, Columbia, SC, United States
The Effects of Internal Waves Shoaling over a Mid-shelf Submarine Bank as Assessed by Eddy Covariance Measurements of Benthic Oxygen Exchange Rates (88959)
Clare E Reimers, Oregon State University, College of Earth, Ocean, and Atmospheric Sciences, Corvallis, OR, United States
The Seasonal Contribution of Different Celtic Sea Shelf Sediments to Benthic Carbon Cycling (89402)
Natalie Hicks, Henrik Stahl, Gangi Ubbara, Lucianne M Marshall and Angela Hatton, Scottish Association for Marine Science
Seasonal Variation in Sediment and Oxygen Fluxes in Shelf Seas (91439)
Megan E Williams1, Laurent Amoudry1, Alejandro Jose Souza2, Henry Ruhl3 and Daniel Jones4, (1)National Oceanography Centre, Liverpool, United Kingdom, (2)CINVESTAV-IPN, Marine Resources, Merida, Mexico, (3)National Oceanography Centre, Southampton, United Kingdom, (4)National Oceanography Centre, United Kingdom
Temporal Variability of N2O and CH4 in Coastal Sediments: Assessing the Impact of Organic Matter Inputs (91067)
Macarena Burgos, Teodora Ortega and Jesus M Forja, CACYTMAR. Dpto. Química Física, Unviersidad de Cadiz, Spain
Resuspension and Biogeochemistry in Coastal Environments: Results from a Coupled Model for Seabed-Water Column Fluxes (91170)
Julia Moriarty1, Courtney Kay Harris2, Christophe Rabouille3 and Marjorie A. M. Friedrichs2, (1)US Geological Survey, Woods Hole, MA, United States, (2)Virginia Institute of Marine Science, Gloucester Point, VA, United States, (3)Lab Sci Climat & Environnement, Gif Sur Yvette Cedex, France