Forests Damaged by Hurricane Katrina Become Major Carbon Source

With the help of NASA satellite data, a research team has estimated that Hurricane Katrina killed or severely damaged 320 million large trees in Gulf Coast forests, which weakened the role the forests play in storing carbon from the atmosphere. The damage has led to these forests releasing large quantities of carbon dioxide into the atmosphere.

The devastation of southern Gulf Coast forests by Hurricane Katrina was documented in before-and-after images from the Landsat 5 satellite. The Interstate 10 "twin-span" bridges that cross Lake Pontchartrain east of New Orleans is seen here pre- and post-Katrina. Bayou Sauvage National Wildlife Refuge is the large patch of forest (green) the lower left portion of the LEFT image, which suffered heavy tree mortality (seen in red in the RIGHT image after the storm.

Credit: USGS