AVHRRSurface water temperature from NOAA's Advanced Very High Resolution Radiometer (AVHRR). Overpasses from all operating AVHRR instruments are averaged into daily, 3-day, 7-day, monthly, seasonal and annual composites (composite includes day and night overpasses). Spatial resolution is nominally 1 km. More information
AVHRR-VIIRS MultisensorSurface water temperature combined from the Advanced Very High Resolution Radiometer (AVHRR) and the Visible Infrared Imaging Radiometer Suite (VIIRS). Overpasses from all operating AVHRR and VIIRS instruments are averaged into daily, 3-day, 7-day, monthly, and seasonal composites (nighttime only). Spatial resolution is nominally 750 km. More information
Geo-Polar BlendedSurface water temperature blended from all available U.S. and international geostationary and polar-orbiting satellites. Greater satellite orbit coverage and the blending technique assure these data are cloud-free. Only nighttime satellite overpasses are used. Spatial resolution is 5 km. More information
PODAAC Multiscale Ultrahigh Resolution (MUR)Surface water temperature analysis from all available infrared and microwave satellites. Coverage from all satellites and the analysis method assure cloud-free coverage on a daily basis. Product is "foundational" SST, i.e. surface temperature before the diurnal heating begins. Spatial resolution is 1 km. More information
MODISChlorophyll-a from the Moderate Resolution Imaging Spectroradiometer (MODIS) onboard the NASA Aqua satellite, processed using the NOAA OC3 algorithm with the combined NIR-SWIR atmospheric correction (NOAA OC3 NIR-SWIR). More information
OLCIChlorophyll-a from the Ocean and Land Colour Intrument (OLCI) onboard the European Sentinel-3A and 3B satellites, courtesy of the European Union's Copernicus satellite program. The data are processed with the European Space Agency's ocean color 4-band combination chlorophyll-a algorithm (OC4ME) and the MERIS 1999 Baseline Atmospheric Correction. More information
VIIRSChlorophyll-a from the Visible Infrared Imaging Radiometer Suite (VIIRS) onboard the Suomi-NPP satellite, processed with the NOAA OC3 algorithm (Wang et al., 2017) and the NIR atmospheric correction of Jiang & Wang (2014). More information
Diffuse Attenuation Coefficient at 490 nm
MODISThe "KD2" standard algorithm from NASA's Ocean Biology Processing Group is used, and processed operationally by NOAA CoastWatch. More information and data processing caveats.
NOAA's turbid coastal-water algorithm is available as a combined product ("k490noaa") using NASA's KD2 algorithm for open-ocean water and NOAA's algorithm for turbid coastal water (Wang et al., 2009). More information
OLCIThe European Space Agency's "M07" Kd490 algorithm with the MERIS 1999 Baseline Atmospheric Correction is used. More information
VIIRSThe Wang et al. (2009) algorithm, developed for MODIS, is used. Atmospheric correction is with the near infra-red approach of Jiang & Wang (2014), also known as the BMW atmospheric correction. The Wang (2009) algorithm is intended to improve values across ocean conditions from turbid to clear. More information
Sediment Index (Remote-Sensing Reflectance at red wavelengths)
The remote-sensing reflectance (Rrs) in the red wavelengths can be used as a surrogate for sediment concentration in the surface water. As the sediment load in the surface water increases, the reflectance in the red wavelengths will increase. Since the Rrs values are reflectance measurements and not sediment concentration measurements, only relative amounts of sediment in the water may be inferred. Higher Rrs values indicate relatively more suspended sediment compared to lower Rrs values. Patterns of suspended sediment distribution, both spatial and temporal, and sediment gradients may be detected and monitored.
MODIS (Rrs at 667 nm)
VIIRS (Rrs at 672 nm)
Total Suspended Matter
Total suspended matter (TSM) is a measure of the concentration of particulate material in the surface water such as mud, silt, and other fine-scale debris, including both organic and inorganic fractions.
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