Project Katrina

For the residents of Louisiana bad news just seems to pile on top of bad news. Of course Hurricane Katrina and Rita in recent times cause enormous problems, but now it appears that glacial ice from as far back as 750,000 years ago is one factor in New Orleans sinking at a rate of 0.17 inches a year. A comprehensive plan needs to be put in place yesterday to deal with all the issues (most interrelated) that is causing this problem to continue to occur.

Sediments deposited into the Mississippi River Delta thousands of years ago when North America’s glaciers retreated are contributing to the ongoing sinking of Louisiana’s coastline, finds new research by NASA and scientists at Louisiana State University.

The weight of these sediments is causing a large section of Earth’s crust to sag at a rate of 0.04 to 0.3 inches a year, the study determined.

The sediments pose a particular challenge for New Orleans, causing it to sink irreversibly at a rate of about 0.17 inches a year, according to data from a network of global positioning system stations and a model of sediment data collected from the northern Gulf of Mexico and the Mississippi Delta.

“When the effect of this sinking near New Orleans is combined with a potential 0.9 centimeter (0.35 inch) annual sea level rise that could result should ice sheet melting accelerate as projected by many climate models, it is possible New Orleans could see a relative sea level rise of roughly one meter (3.3 feet) in the next 90 years,” warned co-author Ron Blom of NASA’s Jet Propulsion Laboratory.