CT11A:
Tracing Ocean Processes: From Organic Carbon Oxidation to Age Estimates by Transient Tracers I


Session ID#: 37671

Session Description:
Transient tracers are a group of (chemical) compounds that are conservative in sea-water and have well-established source function over time at the ocean surface, or have well-defined decay-functions. Transient tracers can be used to investigate ocean ventilation, temporal changes of ventilation, time-scales of ocean circulation and processes such as oxygen utilization rates and the storage of anthropogenic carbon in the ocean interior. Heterotrophic transformation of organic matter drives elemental cycles in aquatic systems. A wide range of transformations affects the ability of microorganisms to assimilate this complex pool of organic matter, including physical aggregation/disaggregation, sorption/desorption, and encapsulation within minerals, photochemical reactions, processing or repackaging by protists and zooplankton, and hydrolysis by extracellular enzymes. These transformations can occur across various groups of microorganisms ranging from bacteria, phytoplankton, protists, to zooplankton. Furthermore, interactions of diverse compound classes within microorganisms can affect the metabolism of those compounds, resulting in phenomena including the priming effect or co-metabolism. This session will discuss methods to quantify transport and ventilation time-scales as well as organic carbon oxidation processes.
Primary Chair:  Andrew D Steen, University of Tennessee, Earth and Planetary Sciences, Knoxville, TN, United States
Co-chairs:  Toste S Tanhua1, Shuting Liu2 and Tim Stoeven1, (1)GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany(2)University of California Santa Barbara, Marine Science Institute, Santa Barbara, CA, United States
Moderators:  Toste S Tanhua, GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany and Shuting Liu, University of California Santa Barbara, Marine Science Institute, Santa Barbara, CA, United States
Student Paper Review Liaison:  Shuting Liu, University of California Santa Barbara, Marine Science Institute, Santa Barbara, CA, United States
Index Terms:

4532 General circulation [OCEANOGRAPHY: PHYSICAL]
4805 Biogeochemical cycles, processes, and modeling [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
4806 Carbon cycling [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
4808 Chemical tracers [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
Cross-Topics:
  • BN - Biogeochemistry and Nutrients
  • MM - Microbiology and Molecular Ecology
  • PS - Physical Oceanography: Mesoscale and Smaller
  • PO - Physical Oceanography: Other

Abstracts Submitted to this Session:

DOC Bioavailability and Evidence of Priming Effect in the Western North Atlantic (317422)
Nicholas Huynh1, Craig A Carlson1, Keri Opalk1, Shuting Liu1, Elisa R Halewood1, Rachel Jane Parsons2, Luis Manuel Bolanos3 and Stephen J Giovannoni3, (1)University of California Santa Barbara, Marine Science Institute/Department of Ecology, Evolution and Marine Biology, Santa Barbara, CA, United States, (2)Bermuda Institute for Ocean Sciences, BIOS, St. George's, Bermuda, (3)Oregon State University, Department of Microbiology, Corvallis, OR, United States
Spatio-Temporal Variability of Microbial Chitinase Activity in Narragansett Bay (325615)
Clayton Woodward Evans, Texas State University San Marcos, San Marcos, TX, United States, MAR Benavides, University of Copenhagen, Marine Biological Section, København K, Denmark, Ryan A Nuttall, University of Massachusetts Dartmouth, New Bedford, MA, United States, Candace Oviatt, University of Rhode Island, Narragansett, RI, United States and Pia Moisander, University of Massachusetts Dartmouth, Department of Biology, North Dartmouth, MA, United States
Deciphering decomposition mechanisms of labile organic matter in marine environments through small peptides (315595)
Zhanfei Liu, UT Austin, Port Aransas, TX, United States, Shuting Liu, University of California Santa Barbara, Marine Science Institute/Department of Ecology, Evolution and Marine Biology, Santa Barbara, CA, United States and Kaijun Lu, The University of Texas at Austin, Marine Science Institute, Port Aransas, TX, United States
Artificial 236U and 129I in the North Atlantic (GEOTRACES-GA01 Transect) in Spring 2014: Assessment of Distribution and Constraint of their Sources (311395)
Maxi Castrillejo1, Núria Casacuberta2,3, Marcus Christl4, Jordi Garcia-Orellana1, Christof Vockenhuber4, Hans-Arno Synal4 and Pere Masqué1,5, (1)Universitat Autònoma de Barcelona, Department of Physics and Institut de Ciència i Tecnologia Ambientals, Barcelona, Spain, (2)ETH-Zurich, Laboratory of Ion Beam Physics, Zurich, Switzerland, (3)ETH-Zurich, Institute of Biogeochemistry and Pollutant Dynamics, Environmental Physics, Zurich, Switzerland, (4)ETH-Zurich, Laboratory of Ion Beam Physics, Switzerland, (5)Edith Cowan University, School of Science, Centre for Marine Ecosystems Research, Perth, Australia
First 39Ar-Dating of Small Ocean Samples (310917)
Sven Ebser1, Arne Kersting2, Zhongyi Feng1, Lisa Ringena1, Maximilian Schmidt1, Stefan Beyersdorfer2, Emeline Mathouchanh2, Florian Ritterbusch2, Toste S Tanhua3, Tim Stoeven3, Werner Aeschbach2 and Markus Oberthaler1, (1)Heidelberg University, Kirchhoff-Institute for Physics, Heidelberg, Germany, (2)Heidelberg University, Institute of Environmental Physics, Heidelberg, Germany, (3)GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
Inter-Annual Variability and Ocean Transport Matrices (313427)
Ann M Bardin1, Keith T Lindsay2 and Francois Primeau1, (1)University of California Irvine, Irvine, CA, United States, (2)NCAR, Boulder, CO, United States
Synoptic Tracer 129I Sections Across the Arctic Ocean from the 2015 German, US and Canadian GEOTRACES Expeditions (320327)
John Smith1, Nuria Casacuberta2, Marcus Christl3, Christof Vockenhuber2, R Jack Cornett4, Timothy C Kenna5 and Thomas P Guilderson6, (1)Bedford Institute of Oceanography, NS, Canada, (2)ETH Swiss Federal Institute of Technology Zurich, Laboratory of Ion Beam Physics, Zurich, Switzerland, (3)ETH-Zurich, Laboratory of Ion Beam Physics, Switzerland, (4)University of Ottawa, Department of Earth and Environmental Sciences, Ottawa, ON, Canada, (5)Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY, United States, (6)University of California at Santa Clara, Santa Clara, CA, United States

See more of: Chemical Tracers, Organic Matter and Trace Elements