Detecting Karenia brevis blooms and algal resuspension in the western Gulf of Mexico with satellite ocean color imagery |
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Authors: | Timothy T. Wynne Richard P. Stumpf Michelle C. Tomlinson Varis Ransibrahmanakul Tracy A. Villareal |
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Affiliation: | aNOAA, National Ocean Service, Center for Coastal Monitoring and Assessment, 1305 East West Highway, Silver Spring, MD 20910, USA;bMarine Science Institute, The University of Texas at Austin, 750 Channel View Drive, Port Aransas, TX 78373, USA |
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Abstract: | Blooms of the toxic dinoflagellate, Karenia brevis, have had detrimental impacts on the coastal Gulf of Mexico for decades. Detection of Karenia brevis blooms uses an ecological approach based on anomalies derived from ocean color imagery. The same anomaly product used in Florida produces frequent false positives on the Texas coast. These failures occurred during wind-driven resuspension events. During these events resuspension of benthic algae significantly increases chlorophyll concentrations in the water, resulting in confusion with normal water column phytoplankton, such as Karenia. A method was developed to separate the resuspended chlorophyll from the water column chlorophyll, decreasing the false positives used with the detection method. |
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Keywords: | Anomaly Chlorophyll Gulf of Mexico Harmful Algal Bloom Karenia brevis Remote sensing Resuspension SeaWiFS Texas |
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