Stumpf, R. NOAA/NOS, rstumpf@cfcg.er.usgs.gov
Ransibrahmanakul, V. Oak Ridge Assoc.,
Arnone, R. Naval Research Laboratory, arnone@nrlssc.navy.mil
Steward, R. University of South Florida, bstew@monty.marine.usf.edu
Carder, K. University of South Florida, kcarder@monty.marine.usf.edu
Tester, P. NOAA Southeast Fisheries Center, ptester@hatteras.bea.nmfs.gov
Tomas, C. Florida Marine Research Institute, tomas_c@sellers.dep.state.fl.us

 
SEAWIFS ALGORITHMS FOR APPLICATION TO TURBID COASTAL WATERS OF THE US SOUTHEAST AND GULF OF MEXICO.
 
An examination of field radiometry and optical measurements together with processing of SeaWiFS data allows us to assess algorithms for the case 2 waters of the eastern Gulf of Mexico and the South Atlantic Bight. This region has extreme variability in pigments, suspended sediments, and detrital and dissolved pigments. Field measurements indicate that standard global algorithms for chlorophyll give acceptable results. Application to SeaWiFS data, however, results in significant overestimation owing to the over-correction of the atmosphere. Even the current calibration results in negative radiances in the blue bands (410 - 490 nm) in many coastal plumes. We have developed an iterative solution that removes all negative radiances, and results in good estimates of the remote sensing reflectance for 443 to 670 nm and also estimated chlorophyll that is consistent with both a limited set of concurrent field data and historical observations. The chlorophyll and attenuation results appear acceptable even in large estuaries such as Mobile Bay, lower Tampa Bay, and Florida Bay. Favorable results appear for measures of suspended sediment, although some adjustment is needed for Florida Bay and Pamlico Sound.
 
Day: Tuesday, Feb. 2
Time: Poster
Location: Sweeney Center
 
Code: SS43TU1155S