When the oceans died

There's a good article at The Atlantic talking about the end-Permian great extinction, and the implications for the future planet under climate change.   Long story short: 

“This study suggests we should be worrying much more about hypoxia than about ocean acidification,” Deutsch says. “There’s vastly more resources being put into [studying] organisms’ responses to pH in seawater than there is into understanding temperature-dependent hypoxia. I think that the field has basically allocated those resources in exactly the wrong way.”

The modern oceans have already lost 2 percent of their oxygen since 1960, a remarkable loss driven mostly by coastal nutrient pollution and global warming. It’s an environmental problem that promises to worsen in the warmer world of the coming centuries, just like it did in the end-Permian. And if Earth’s past is any indication of its future, this asphyxiation could be truly world changing. The prospect has led dozens of paleoclimatologists, geochemists, and oceanographers to sign the Kiel Declaration on Ocean Deoxygenation, developed this September to raise global awareness of a problem with increasingly worrying geological precedent.

“This study shows that we’re on that same road toward extinction, and the question is how far down it we go,” Penn says.

Read the whole thing.