Year: 2007
Type: article
Abstract: ABSTRACT: Central west Florida shelf (CWFS) has a nearly annual occurrence of red tides. Two current operating ocean color sensors (SeaWiFS and MODIS) were used to identify a bloom of the toxic dinoflagellate Karenia brevis during August 2001. Chlorophyll concentrations alone cannot be used to distinguish taxonomic groups, so other optical means must be brought into play to discriminate phytoplankton. Thus, a preexisting technique based on high chlorophyll concentration and low particulate backscatter, previously applied to SeaWiFS, was tested on MODIS to detect K. brevis. Moreover, standard global chlorophyll algorithms , in the CWFS, can have errors, of either sign, so the performance of a new methodology based only on a single water leaving radiance band was applied to measurements from both sensors. The results showed that both approaches worked similarly and satisfactorily, but the new methodology was able to produce more consistent outcomes between both sensors. This is extremely encouraging for across-sensor applications in other red tide events.
Authors: Gustavo De Araújo Carvalho, Peter Minnett, Warner Baringer, Viva Banzon
Language: English
Subfield: Oceanography
Field: Earth and Planetary Sciences
Domain: Physical Sciences
SDG: Life below water
Open Access status: green
OpenAlex ID: W7009122455