A study published Monday warns that New Orleans must immediately begin planning and gradually implementing its permanent evacuation to avert a dangerously rushed exodus later, because it has passed a “point of no return” as climate-driven sea-level rise slowly swallows the storied city.
“With global temperatures poised to exceed the 1.5°C Paris Agreement threshold—a level that triggered substantial ice sheet collapse during the Last Interglacial—low-elevation coastal zones face sea-level commitments far beyond current planning horizons,” says the study, which was published by the journal Nature Sustainability.
“With this geological frame of reference, we examine the impact of sea-level rise on what may be the most physically vulnerable coastal zone in the world using prehistoric and contemporary patterns of human mobility,” the publication continues. “We highlight the positive aspects of the recently commenced out-migration in this region and argue that the fate of communities landwards of this coastal zone will be decided in the next few decades.”…