Pacific Ocean

Pacific West Coast Acidification Rate Larger than Other Oceans

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The ocean absorbs carbon dioxide from the atmosphere, which reduces pH levels and concentrations of calcium carbonate, a mineral used by shellfish to calcify their shells. As more carbon is released into the atmosphere, concentrations of calcium carbonate decrease and the shells of organisms like foraminifera get thinner, a trend Osborne saw clearly in the sediment cores she examined.

“The shell thickness record instantly showed a long-term declining trend,” she said. “It was really obvious across entire record.”

“Whole Ecosystem Change” in Pacific Ocean

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“This El Nino is building up to be quite a doozy, but we also have a series of other changes going on,” said Steve Palumbi, director of the Hopkins Marine Station at Stanford University. “We are having changes in wind patterns, changes in upwellings along the coast. It’s like your whole basic ecosystem is being shifted around in different ways.”

NOAA Nominates Chumash Heritage National Marine Sanctuary

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“There is tremendous potential for good here,” said Fred Collins, Administrator of the Northern
Chumash Tribal Council. “A Chumash Heritage National Marine Sanctuary will preserve and recognize
the importance of our tribal history, safeguard our shared coastal resources, and open new doors
for research and economic growth. We hope to move forward to designation as soon as possible.”

Acidification Devastates Oyster Industry

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That culprit, ocean acidification, is the caustic cousin of climate change, and it shifts the chemistry of ocean water, making it harder for oysters to grow. That’s because about 30 percent of the carbon dioxide released into the atmosphere is absorbed by the ocean, causing pH levels to plummet and making the water more acidic. The more pollution in the air, the more carbon dioxide the ocean absorbs.