Oil Slick Around Mississippi Barrier Islands
acquired June 26, 2010 download large image (3 MB, JPEG, 3400x2800)
acquired June 26, 2010 download GeoTIFF file (24 MB, TIFF, 3200x3200)
acquired June 26, 2010 download Google Earth file (KML)

As of June 27, 2010, the entire gulf-facing beachfront of several barrier islands in eastern Mississippi (offshore of Pascagoula) had received a designation of at least “lightly oiled” by the interagency Shoreline Cleanup Assessment Team that is responding to the disaster in the Gulf of Mexico. A few small stretches of Petit Bois Island had been labeled heavily or moderately oiled.

This high-resolution image shows Petit Bois Island (top right) and the eastern end of Horn Island (top left) on June 26. In general, oil-covered waters are silvery and cleaner waters are blue-gray. This pattern is especially consistent farther from the islands. The intensely bright patches of water directly offshore of the barrier islands, however, may be from a combination of factors, including sediment and organic material, coastal currents and surf, and oil.

The islands provide a sense of scale for the ribbons of oil swirling into the area from the south. Petit Bois Island is about 10 kilometers (6 miles) long. It is one of seven barrier islands that, along with some mainland areas of Mississippi and Florida, make up the Gulf Islands National Seashore. According to the National Park Service Gulf Islands National Seashore Website, all the islands remained open to the public as of June 28, 2010, and clean-up crews were on hand to respond to any oil coming ashore.

The large version of this image, which was captured by the Advanced Land Imager on NASA’s Earth Observing-1 (EO-1) satellite, shows a larger area, including the Mississippi Sound and parts of mainland Mississippi. Although oil has been observed in the Sound, it is unlikely that all the bright patches of water in that area are thickly oil-covered. Differences in brightness in coastal area waters may be due to other factors, including freshwater runoff, strong currents, and water depth and clarity.

  • References

  • Shoreline Assessment Response Team, Mobile Sector. (27, June 2010). Latest Observed 06-27-2010. GIS layer published on Geoplatform.gov/gulfresponse Website. Accessed June 28, 2010.

NASA Earth Observatory image created by Jesse Allen and Robert Simmon, using EO-1 ALI data provided courtesy of the NASA EO-1 team. Caption by Rebecca Lindsey.

Instrument(s): 
EO-1 - ALI

Oil Slick Around Mississippi Barrier Islands

June 29, 2010
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