Climate Scientists Unlock Secrets of ‘Blue Carbon’

Tidal wetlands come in many forms, but they could be more alike below the surface than anyone realized. Whether it’s a mangrove forest in Florida, a freshwater swamp in Virginia or a saltwater marsh in Oregon, the amount of carbon locked in a soil sample from each of these coastal ecosystems is roughly the same. That’s the surprising message from a new analysis of some 1,900 soil cores collected around the United States during the past few decades.