Your query was:

"OS11A-01"

HR: 08:35h
AN: OS11A-01 INVITED
TI: Ocean History: Nutrients and the Global Carbon Cycle
AU: * Delaney, M L
EM: delaney@ucsc.edu
AF: University of California, Santa Cruz, Santa Cruz, CA 95064 United States
AB: Critical factors in the global carbon cycle are the burial of organic carbon and calcium carbonate in marine sediments. Key questions about the modern ocean focus on the production of organic carbon by photosynthesis and its relationship to nutrient cycling. Organic carbon transport through the water column and its regeneration at depth in the ocean and in sediments control organic carbon burial, and calcium carbonate production in the water column and depth-related dissolution control its burial. Questions include issues like what limits productivity of organic carbon and calcium carbonate? How are different nutrient cycles linked to each other and to the carbon cycle? How are these linked to changes in atmospheric carbon dioxide through time? Marine sediments serve both as carbon sinks and as the archives of ocean history of climate and biogeochemical cycles. In this talk, I will focus on the status of our knowledge of carbon and nutrient cycle variations in past oceans on different timescales (e.g., events, excursions, long-term trends) from the marine sedimentary record.
DE: 4800 OCEANOGRAPHY: BIOLOGICAL AND CHEMICAL
SC: OS
MN: 2004 Ocean Sciences Meeting