Karenia brevis monthly bloom frequency maps on the West Florida Shelf
Description
This dataset provides monthly frequency maps of Karenia brevis blooms (red tides) on the West Florida Shelf, 1978-1986, 2003-2024. It integrates data from two satellite sensors: - CZCS-derived maps: Covering 1978-1986, based on CZCS Nimbus-7 data - MODIS-derived maps: Covering 2003-2019, based on MODIS Aqua data - VIIRS-derived maps: Covering 2012-2014, based on VIIRS SNPP data Two spatial resolutions are provided: - 1 km resolution, geographic extent: 88.0°W to 81.0°W, 23.0°N to 31.0°N - 0.1° resolution, geographic extent: 87.5°W to 81.0°W, 25.0°N to 30.5°N File Formats: - TIFF (.tif): Each file contains monthly bloom frequency values ranging from 0 to 1, indicating the proportion of days within the month when a bloom was detected at each pixel. Pixels with no valid observations are marked as NaN. - PNG (.png): Visualization-ready images using a 'jet' colormap, where values from 0 to 1 are mapped to a color gradient (blue to red) for rapid visual inspection. Each file name follows the format: YYYY_MM_monthly_frequency_SENSOR_RESOLUTION.EXT Where: YYYY_MM = year and month of observation SENSOR = MODIS or VIIRS RESOLUTION = 1km or 0.1deg EXT = file extension (.tif or .png)
Files
Steps to reproduce
The methods used to generate this dataset are detailed in the following peer-reviewed publications: - Hu, C., Yao, Y., Cannizzaro, J. P., Garrett, M., Harper, M., Markley, L., Villac, C., & Hubbard, K. (2022). Karenia brevis bloom patterns on the west Florida shelf between 2003 and 2019: Integration of field and satellite observations. Harmful Algae, 117, 102289. - Yao, Y., Hu, C., Cannizzaro, J. P., Barnes, B. B., English, D. C., Xie, Y., Hubbard, K., & Wang, M. (2023). Detection of Karenia brevis red tides on the West Florida Shelf using VIIRS observations: Accounting for spatial coherence with artificial intelligence. Remote Sensing of Environment, 298, 113833.