CT009
Significance of Photochemistry in Marine Biogeochemical Cycles
Session ID#: 85259
Session Description:
Over the last 50 years, the field of marine photochemistry has progressed steadily toward an improved understanding of the significance that sunlight has on critical marine chemical processes. We now appreciate that photochemistry has the power to profoundly impact marine ecology, seawater redox state, the elemental cycles of metals, carbon, sulfur and nitrogen, as well as atmospheric processes through the photoproduction and consumption of volatile gases. Current knowledge of photochemical reactions occurring in the surface ocean span molecular to global scales. Advances ranging from high resolution MS and NMR technologies and novel trace element analysis, to new remote sensing capabilities and optical algorithms for modeling photochemical processes throughout the photic zone now bring us to a point that integrated approaches should allow rigorous spatial and temporal scaling of marine photochemical reactions. This session solicits contributions that provide new data and novel approaches that will further advance our evaluation of the quantitative impact of photochemical reactions on local, regional, and global biogeochemical cycles. Presentations covering the full complement of marine photochemical and photobiological studies (organic carbon, elemental, ROS, optical, ecological, and models) as they relate to impacts on all marine systems are welcome.
Index Terms:
4504 Air/sea interactions [OCEANOGRAPHY: PHYSICAL]
4805 Biogeochemical cycles, processes, and modeling [OCEANOGRAPHY: CHEMICAL]
4850 Marine organic chemistry [OCEANOGRAPHY: CHEMICAL]
4852 Photochemistry [OCEANOGRAPHY: CHEMICAL]
Primary Chair: Heather E Reader, Memorial University of Newfoundland, St John's, NL, Canada
Co-chairs: William L Miller, University of Georgia, Marine Science, Athens, GA, United States, David J Kieber, SUNY College of Environmental Science and Forestry, Department of Chemistry, Syracuse, NY, United States and Yuting Zhu, Wadsworth Center, New York State Department of Health, Albany, NY, United States
Primary Liaison: Heather E Reader, Memorial University of Newfoundland, St John's, NL, Canada
Photochemical source of nitrous acid in the marine boundary layer at Tudor Hill Marine Atmospheric Observatory in Bermuda (639365)
Yuting Zhu1, Youfeng Wang1,2, Xianliang Zhou1,3, Yasin F Elshorbany4, Chunxiang Ye2, Matthew Hayden5 and Andrew Peters5, (1)Wadsworth Center, New York State Department of Health, Albany, NY, United States, (2)State Key Laboratory of Environmental Simulation and Pollution Control, Peking University, College of Environmental Sciences and Engineering, Beijing, China, (3)University at Albany, SUNY, Department of Environmental Health Sciences, Albany, United States, (4)University of South Florida, Atmospheric Chemistry and Climate Laboratory, College of Arts and Sciences, St. Petersberg, FL, United States, (5)Bermuda Institute of Ocean Sciences, St.George's, Bermuda
Determining the Photochemical Fate of Organic UV-Filters Commonly Found in Sunscreen (640111)
Jessalyn Davis1, Michael Gonsior2 and Leanne Powers2, (1)University of Southern Mississippi, Department of Marine Science, Hattiesburg, MS, United States, (2)University of Maryland Center for Environmental Science, Chesapeake Biological Laboratory, Solomons, MD, United States
Photobleaching of CDOM: A new approach to quantify apparent quantum yield matrices applicable to spectral photochemical models (646143)
Xiaohui Zhu, Boston University, Earth and Environment, Boston, MA, United States, William L Miller, University of Georgia, Marine Science, Athens, GA, United States and Cedric G Fichot, Boston University, Boston, MA, United States
Constraining photochemical production rates of dissolved inorganic carbon in the open ocean using the moderate dissolved inorganic carbon (DI13C) isotope enrichment (MoDIE) method (646364)
Kun Ma, University of Georgia, Skidaway Institute of Oceanography, Savannah, United States, Jay Brandes, University of Georgia, Skidaway Institute of Oceanography, Department of Marine Sciences, Savannah, GA, United States, Leanne Powers, University of Maryland Center for Environmental Science, Chesapeake Biological Laboratory, Solomons, MD, United States and William L Miller, University of Georgia, Marine Science, Athens, GA, United States
Photochemical lability of dissolved organic matter in deep water in the western tropical Pacific Ocean (649345)
Gui-sheng Song, School of Marine Science & Technology, Tianjin University, United States, Fangming Yang, Tianjin University, School of Marine Science & Technology, Tianjin, China, Huixiang Xie, ISMER UQAR, Rimouski, QC, Canada and Philippe Massicotte, Université Laval, Takuvik Joint International Laboratory (UMI 3376), Quebec, QC, Canada
Assessing the wavelength dependence of photochemical reactions in aquatic ecosystems using light-emitting diodes (LEDs) (650594)
Collin P Ward, Woods Hole Oceanographic Institution, Woods Hole, MA, United States, Jennifer C Bowen, University of Michigan, Ann Arbor, MI, United States and Charles Sharpless, University of Mary Washington, Chemistry, Fredericksburg, VA, United States
Photochemical degradation of antioxidants: kinetics and molecular end products (657054)
Sofia Semitsoglou Tsiapou1, Travis Meador1, David Kahoun2 and Lihini Aluwihare3, (1)Biology Centre CAS, SoWa, Ceske Budejovice, Czech Republic, (2)University of South Bohemia, Institute of Chemistry at Faculty of Science, Ceske Budejovice, Czech Republic, (3)Scripps Institution of Oceanography, Geosciences Research Division, La Jolla, CA, United States
