CT52A:
Linking Optical and Chemical Properties of Organic Matter I


Session ID#: 11300

Session Description:
During the last decade there has been a substantial increase in the number of studies using the optical properties (absorbance and fluorescence) of dissolved organic matter (DOM) as a proxy for its chemical properties in freshwater, estuaries and the coastal and open ocean. As a result progress has been made on finding the actual chemical compounds or phenomena responsible for DOM’s optical properties. Techniques such as ultrahigh resolution mass spectrometry have played an important role. However much requires further study. Spectroscopic measurements which are relatively easier to employ in synoptic and high resolution sampling of DOM distribution and dynamics offer unique insight to major advances in our understanding of organic matter cycling in all aquatic ecosystems. We invite talks and posters that specifically make connections between optical signals in absorbance and/or fluorescence and biogeochemical properties of freshwaters (lakes, rivers), estuaries and the coastal and open ocean. We encourage studies that describe DOM’s optical and chemical linkages at interfaces: terrestrial-aquatic, ocean-atmosphere, benthic-pelagic, dissolved-particulate, water-sediment, etc.  We also welcome contributions that utilize remote sensing and in-situ monitoring to make connections between optical and chemical properties of organic matter.
Primary Chair:  Chris L Osburn, North Carolina State University, Marine, Earth, and Atmospheric Sciences, Raleigh, NC, United States
Chairs:  Robert G Spencer, Florida State University, Department of Earth, Ocean and Atmospheric Science, Tallahassee, FL, United States, Colin A Stedmon, Technical University of Denmark - Space, Kongens Lyngby, Denmark and Thomas S Bianchi, University of Florida, Geological Sciences, Ft Walton Beach, FL, United States
Moderators:  Colin A Stedmon, Technical University of Denmark, National Institute for Aquatic Resources, Kgs. Lyngby, Denmark, Robert G Spencer, Florida State University, Earth, Ocean and Atmospheric Science, Tallahassee, FL, United States, Thomas S Bianchi, University of Florida, Geological Sciences, Ft Walton Beach, FL, United States and Chris L Osburn, North Carolina State University, Marine, Earth, and Atmospheric Sciences, Raleigh, NC, United States
Student Paper Review Liaison:  Chris L Osburn, North Carolina State University, Marine, Earth, and Atmospheric Sciences, Raleigh, NC, United States
Index Terms:

4264 Ocean optics [OCEANOGRAPHY: GENERAL]
4806 Carbon cycling [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]
4808 Chemical tracers [OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL]

Abstracts Submitted to this Session:

CT52A-02
Molecular Families Associated with Optical Properties in the Florida Coastal Everglades (91283)
Sasha Wagner, Skidaway Institute of Oceanography, Savannah, GA, United States, Rudolf Jaffe, Florida International University, Southeast Environmental Research Center, Miami, FL, United States, Kaelin Cawley, University of Colorado at Boulder, Department of Civil, Environmental and Architectural Engineering, Boulder, CO, United States, Thorsten Dittmar, University of Oldenburg, Research Group for Marine Geochemistry (ICBM-MPI Bridging Group), Oldenburg, Germany and Aron Stubbins, Skidaway Institute of Oceanography, University of Georgia, Savannah, GA, United States
CT52A-03
Further Insights on the Chemical Structure of Humic Substances (HS) and Chromophoric Dissolved Organic Matter (CDOM) in Relation to their Optical/Chemical Properties (89784)
Rossana Del Vecchio1, Tara Marie Schendorf2, Kevin Koech2 and Neil V Blough2, (1)University of Maryland, ESSIC, College Park, MD, United States, (2)Univ Maryland, College Park, MD, United States
CT52A-04
Quantum Yields of Natural Organic Matter and Organic Compounds: Implications for the Fluorescence-based Interpretation of Organic Matter Composition (90933)
Urban Johannes Wünsch, Technical University of Denmark, National Institute of Aquatic Resources, Kgs. Lyngby, Denmark, Kathleen Murphy, Chalmers University of Technology, Water Environment Technology, Gothenburg, Sweden and Colin A Stedmon, Technical University of Denmark, National Institute for Aquatic Resources, Kgs. Lyngby, Denmark
CT52A-06
Time-resolved and Depth-dependent Photo-Degradation of Marine Dissolved Organic Matter Analyzed by Semi-continuous EEM Fluorescence Monitoring (89062)
Michael Gonsior, University of Maryland Center for Environmental Science, Chesapeake Biological Laboratory, Solomons, MD, United States, Stephen Timko, University of California Irvine, CA, United States, Maureen H Conte, Bermuda Institute of Ocean Sciences, St.George's, Bermuda and Philippe Schmitt-Kopplin, Helmholtz Zentrum Muenchen, German Research Center for Environmental Health, Research Unit Analytical Biogeochemistry, Neuherberg, Germany
CT52A-07
In Situ Absorbance and Fluorescence as Surrogate Data to Continuously Measure Nitrogen, Phosphorus and Carbon Concentrations in a Brackish Tidal Marsh (92487)
James Randall Etheridge1,2, Francois Birgand3 and Michael R Burchell2, (1)East Carolina University, Engineering, Greenville, NC, United States, (2)North Carolina State University at Raleigh, Biological and Agricultural Engineering, Raleigh, NC, United States, (3)North Carolina State University, Biological and Agricultural Engineering, Raleigh, NC, United States
CT52A-08
Photochemical Degradation of Petroleum-Derived Water-Soluble Organics into the Background Dissolved Organic Carbon Pool (93556)
David C Podgorski1, Phoebe Zito Ray1, Nikole V Roland2, Yuri E Corilo1, Matthew A Tarr3, François Guillemette4 and Robert G Spencer4, (1)National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL, United States, (2)Gardner-Webb University, Department of Natural Sciences, Boiling Springs, NC, United States, (3)University of New Orleans, Department of Chemistry, New Orleans, LA, United States, (4)Florida State University, Department of Earth, Ocean and Atmospheric Sciences, Tallahassee, FL, United States
See more of: Chemical Tracers, DOM and Trace Metals