Aquatic Sciences Meeting, Albuquerque 2001

PC02 Optical Studies in Aquatic Ecosystems

Date: Tuesday, February 13, 2001

Location: Southwest Hall

Conmy, R, N, University of South Florida, St. Petersburg, USA, rconmy@seas.marine.usf.edu

Coble, P, G, University of South Florida, St. Petersburg, USA, pcoble@seas.marine.usf.edu

Ivey, J, E, University of South Florida, St. Petersburg, USA, jivey@seas.marine.usf.edu

CHANGES IN THE OPTICAL PROPERTIES OF COLORED DISSOLVED ORGANIC MATTER DURING A LAGRANGIAN EXPERIMENT ON THE WEST FLORIDA SHELF.

Optical properties, such as fluorescence intensity, peak position and absorption coefficients, are useful in determining sources of Colored Dissolved Organic Matter (CDOM) in coastal environments. Biogeochemical processes acting over varying time scales are known to alter these properties. Lagrangian experiments allow for following a water mass to determine time-based changes in optical and physical properties. We will present the results from the June 2000 FSLE cruise (Florida Shelf Lagrangian Experiment) from the West Florida Shelf off Tampa Bay. High resolution surface underway fluorescence maps were generated using the WetLabs multi-spectral SAFIre (Spectral and Absorption Fluorescence Instrument). Discrete samples were collected from the underway system and from the CTD rosette down to 32 meters and then analyzed using fluorescence and absorption spectroscopy. Variations in the optical properties, temperature and salinity were used to examine the biogeochemical changes during this experiment and will be discussed.

This Session Listing

Aquatic Sciences Meeting, Albuquerque 2001

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