Climate change causing dead zones along US west coast
Scientists believe climate change is the cause of stronger winds that drive upwelling of nutrient-rich deep ocean waters 
The spectre of an ocean floor littered with dead shellfish, rock fish, sea stars and other marine life off the Oregon coast spurred Mark Snyder, a climate change expert, to investigate whether California’s coast faced a similar calamity. It could, the University of California Santa Cruz earth scientist said, citing climate change, which some scientists believe is responsible for stronger and more persistent winds along the coast. There’s no debate that windier conditions drive more upwelling of nutrient-rich deep ocean waters. At normal levels, this upwelling sustains the abundance of marine life, but too much of these rich waters leads to a boom-and-bust cycle that ultimately creates ocean "dead zones" with little or no oxygen. Marine life that can’t swim or scuttle away from these lethal zones suffocate. … "It was just chance they found the dead zones in Oregon," Snyder said, describing how fishers reported to marine scientists an alarming number of dead or dying crabs they were pulling up in traps. "It’s quite possible these areas could be off the California coast," he said. … The worst year recorded was 2006, with the dead zone near the coast spreading from southern Oregon into Washington, where dead fish and crabs washed up on beaches along the Olympic Peninsula. Less severe dead zones returned in 2007. "We’ve seen areas that are carpeted with dead marine life," said Oregon State marine ecologist Francis Chan. One video image stuck in his mind: A large dead sea star that must have been decades old, rotting in the water. Marine life such as that, which adhere to rocks most of their lives, can’t scurry away from suffocating waters, he said. "It was pretty striking."
