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FINDING HARMFUL ALGAE IN FLORIDA AND LAKE ERIE WITH HIGH RESOLUTION SATELLITES (E)

Harmful algal blooms (HABs) of cyanobacteria are an annual occurrence throughout Florida lakes and the western basin of Lake Erie. The moderate imaging resolution spectrometer (MODIS) has the ideal temporal resolution for detecting such blooms, although its spatial resolution is poor for small lakes. High resolution satellites, such as Landsat 8 operational land imager (OLI, 30m) are preferable for monitoring small lakes, but lack frequency for evaluation. This study determines if MODIS can be used as a surrogate for OLI to evaluate the Landsat chlorophyll a (chl) algorithm. MODIS cyanobacteria index (CI) is the metric used for accurate quantification of blooms in Lake Erie and Florida. CI values were compared to MODIS mean chl concentrations over 2013-2015 in the western basin of Lake Erie and over 2015 in Florida lakes and to in situ chl concentrations provided by the Western Lake Erie monitoring program. The Landsat chl algorithm was also applied to OLI and high resolution MODIS (hMODIS, 300m) images of the same day during bloom and non-bloom conditions in both Lake Erie and Florida lakes. MODIS CI and the Landsat chl algorithm correlate well for MODIS Terra and Aqua imagery during 2013-2015. The Landsat 8 OLI chl and hMODIS closely match in these areas. MODIS can serve as a suitable surrogate for Landsat 8 OLI for further testing of Landsat chl algorithms. Additional work is presented in evaluating Landsat 8 chl algorithms in other inland and estuarine waters, including the Chesapeake Bay estuary, using field measurements of chl a concentrations.

Authors

Rappa, V., City College of New York CUNY, USA, vrappa000@citymail.cuny.edu

Stumpf, R., National Oceanic and Atmospheric Administration , USA, richard.stumpf@noaa.gov

Tomlinson, M., National Oceanic and Atmospheric Administration , USA, michelle.tomlinson@noaa.gov

Dupuy, D., National Oceanic and Atmospheric Administration , USA, danielle.dupuy@noaa.gov

Briggs, T., National Oceanic and Atmospheric Administration , USA, travis.briggs@noaa.gov

Meredith, A., National Oceanic and Atmospheric Administration , USA, andrew.meredith@noaa.gov

Wynne, T., National Oceanic and Atmospheric Administration, USA, timothy.wynne@noaa.gov

Lamb, B., City College of New York CUNY, USA, blamb@gradcenter.cuny.edu

Tzortziou, M., City College of New York CUNY, USA, mtzortziou@ccny.cuny.edu

Details

Poster presentation

Session #:021
Date: 03/03/2017
Time: 11:00 - 12:00
Location: Poster/Exhibit Hall

Presentation is given by student: Yes

PosterID: 218