seafood market 2018 Algae Bloom in Lake Okeechobee 9/20/18

This video shows two different kinds of satellite images of Lake Okeechobee taken in June, July, August and September of 2018, each showing time series from when the bloom began to the most recently available image. The images are created from data collected by a European Union satellite that makes a pass over the lake on a daily basis. The image on the left shows a true-color image, which is what you would see if looking down onto the lake from space. The image on the right is derived from an experimental product developed by Richard Stumpf from the NOAA National Ocean Service. The computer program takes the data showing reflected light across the visible spectrum, focuses only on that light range reflected by blue-green algae, and then produces a map showing the estimated density of blue-green algae cells in the lake. This new product is under development and has been tested through extensive ground truthing by the South Florida Water Management District in partnership with NOAA. SFWMD has been taking counts of blue-green algae in water samples and comparing those with estimates from the satellite tool in order to fine tune those estimates. Watching both maps through time is useful because there is at least one day where it looks like the bloom diminished in size, but it was simply cloud cover blocking a clear view of the entire lake.
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En español

Afloramientos de algas en el lago Okeechobee 8/9/2018
Este video muestra dos tipos diferentes de imágenes satelitales del Lago Okeechobee tomadas en junio, julio, agosto y septiembre de 2018, cada una de las cuales muestra una serie cronológica desde el inicio del afloramiento hasta la última imagen disponible. Las imágenes se crean a partir de los datos recopilados por un satélite de la Unión Europea que hace un pase sobre el lago a diario. La imagen de la izquierda muestra una imagen de color verdadero, que es lo que verías si miraras hacia el lago desde el espacio. La imagen de la derecha se deriva de un producto experimental desarrollado por Richard Stumpf del NOAA National Ocean Service. El programa de computadora toma los datos que muestran la luz reflejada a través del espectro visible, se enfoca solo en el rango de luz reflejado por las algas verdeazuladas, y luego produce un mapa que muestra la densidad estimada de las células de algas verdiazules en el lago. Este nuevo producto está en desarrollo y ha sido probado a través de una exhaustiva verificación en tierra por parte del Distrito de Administración del Agua del Sur de la Florida en asociación con NOAA. El Distrito de Administración del Agua del Sur de la Florida ha estado tomando recuentos de algas verdeazuladas en muestras de agua y las ha comparado con las estimaciones de la herramienta de satélite para ajustar esas estimaciones. Mirar ambos mapas a través del tiempo es útil porque hay al menos un día en el que parece que el afloramiento disminuyó de tamaño, pero era simplemente una capa de nubes que bloqueaba una vista clara de todo el lago.

seafood market 2018 Algae Bloom in Lake Okeechobee 9/20/18
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