Wind shifts devastate ocean life
By Jonathan FildesScience and technology reporter, BBC News, San Francisco
The delicate interplay between the oceans and atmosphere is changing with catastrophic consequences.
Entire marine ecosystems have been wiped out, devastating populations of sea birds and larger marine mammals.
These "dead zones" occur where there are disturbances to the nutrient-rich ocean currents, which are driven by coastal winds.
Extreme marine suffocations have occurred off the west coast of the US every year for the last five years.
The most intense event, which left the ocean floor littered with the carcasses of crabs, happened in 2006.
It was unlike anything that we've measured along the Oregon coast in the past five decades," said Dr Francis Chan, of Oregon State University (OSU).
Other coastal countries including Chile, Namibia and South Africa have also been affected.
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