HR: 10:50h
AN: OS12A-03 INVITED     [Abstracts]
TI: Dissolved Organic Matter in the Hudson River Plume
AU: * Chen, R F
EM: bob.chen@umb.edu
AF: UMassBoston, Environmental, Earth and Ocean Sciences (EEOS) 100 Morrissey Blvd., Boston, MA 02125 United States
AU: Gardner, G B
EM: bernie.gardner@umb.edu
AF: UMassBoston, Environmental, Earth and Ocean Sciences (EEOS) 100 Morrissey Blvd., Boston, MA 02125 United States
AB: As part of the LATTE (Lagrangian Transport and Transformation Experiment) program, dissolved organic carbon (DOC), total nitrogen (TN), and chromophoric dissolved organic matter (CDOM) were measured in the Hudson River Estuary and Plume. As revealed by high resolution measurements from the Integrated Coastal Observation System (ICOS), dissolved organic matter has several sources within the estuary including the Hudson and Raritan Rivers, and a yet unidentified anthropogenic source off Manhattan. The quantity of dissolved organic matter that is exported from the Hudson River Estuary is significantly greater than that which the Hudson River can supply by simply conservative mixing with coastal seawater. In May, 2004, rhodamine dye was injected at the surface as the plume flowed out onto the New York/New Jersey shelf, once as the plume turned north towards Long Island, and once as the plume flowed south along the New Jersey coast. The ECOShuttle (a towed-undulating vehicle) carrying a rhodamine fluorometer was able to track these dye patches. An examination of dissolved organic matter transformations that occurred over these two to two and one-half day Lagrangian experiments will be discussed. In addition seasonal distributions of dissolved organic matter distributions will be presented from cruises in June 2003, June 2004 and September 2004 under different river flow and wind conditions.
DE: 4805 Biogeochemical cycles (1615)
DE: 4847 Optics
DE: 4850 Organic marine chemistry
DE: 4857 Pollution
SC: Ocean Sciences [OS]
MN: 2004 AGU Fall Meeting