HR: 1330h
AN: OS43A-13    [Abstracts]
TI: Effects of Cross-Shelf Physical Forcing on Satellite Bio-Optical Properties
AU: * Ladner, S D
EM: ladner@nrlssc.navy.mil
AF: Planning Systems Incorporated, NRL Code 7333 Building 1009 RM 127A, Stennis Space Center, MS 39529 United States
AU: Teague, W J
EM: teague@nrlssc.navy.mil
AF: Naval Research Laboratory, NRL Code 7333 Building 1009 RM 107A, Stennis Space Center, MS 39529 United States
AU: Mitchell, D A
EM: doug.mitchell@nrlssc.navy.mil
AF: Naval Research Laboratory, NRL Code 7333 Building 1009 RM 107A, Stennis Space Center, MS 39529 United States
AU: Goode, W A
EM: goode@nrlssc.navy.mil
AF: Naval Research Laboratory, NRL Code 7333 Building 1009 RM 107A, Stennis Space Center, MS 39529 United States
AU: Gould, R W
EM: gould@nrlssc.navy.mil
AF: Naval Research Laboratory, NRL Code 7333 Building 1009 RM 107A, Stennis Space Center, MS 39529 United States
AU: Arnone, R A
EM: arnone@nrlssc.navy.mil
AF: Naval Research Laboratory, NRL Code 7333 Building 1009 RM 107A, Stennis Space Center, MS 39529 United States
AB: Our goal is to determine the effects of cross-shelf physical forcing on the optical properties in the northern Gulf of Mexico using in situ optical profiles and surface ocean color satellite images from SeaWiFS. The Naval Research Laboratory at Stennis Space Center is conducting an extensive monitoring program in the Northeast Gulf of Mexico west of the Desoto Canyon. During the Slope to Shelf Energetics and Exchange Dynamics (SEED) project, 14 bottom mounted Acoustic Doppler Current Profilers (ADCP's) were deployed from May-December 2004 along the shelf break at depths ranging from 60 to 1000 meters to improve understanding of cross-shelf exchange processes. Analysis of the May current data indicate abnormal events, including 30 cm/s off-shelf currents throughout the water column and a 3° Celsius elevation in bottom temperature. Coincident optical profiles were collected in May (absorption, scattering coefficients) and are compared with currents and physical properties (temperature, salinity). Similar subsurface abnormalities with stronger currents occurred in September during the passing of Hurricane Ivan over the mooring sites. We will show a time series of near-surface current speeds and their effect on the surface-satellite optical properties over the entire SEED sampling exercise.
DE: 4219 Continental shelf processes
DE: 4512 Currents
DE: 4546 Nearshore processes
DE: 4552 Ocean optics
DE: 4572 Upper ocean processes
SC: Ocean Sciences [OS]
MN: 2005 Joint Assembly