Letters to the Editor

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CLIMATE: Wind-driven ocean upwelling kills oysters

Letter by Ken A. Schlichte, Tumwater on April 16, 2012 at 12:07 pm | 3 Comments »
April 16, 2012 12:07 pm

Researchers indicated in a recent article (TNT, 4-13) that huge oyster die-offs are occurring along the Northwest coast, but only when wind-driven upwelling events bring deep and naturally corrosive water containing more dissolved carbon dioxide up to the ocean surface.

These researchers have indicated in their other reports that this naturally corrosive water now upwelling along the Northwest coast has been kept at depth and away from the ocean surface for about 50 years – meaning that it was last exposed to the atmosphere a half-century ago when carbon dioxide levels were much lower.

These researchers have provided evidence that the upwelling of naturally corrosive deep ocean water that was last exposed at the ocean surface a half-century ago when atmospheric carbon dioxide levels were much lower is primarily responsible for the recent huge Northwest oyster die-offs.

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