The U.N. Intergovernmental Panel on Climate Change has released its latest report on the oceans, and it's not good. Ocean surface temperatures have been warming steadily since 1970, and for the past 25 years or so, they've been warming twice as fast.
The report also notes a relatively new phenomenon in the oceans: marine heat waves. In recent years they've driven a cascade of changes in marine life off the coast of the Pacific Northwest, which in turn led to disastrous seasons for commercial fishermen. | 
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