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A deadly recipe is brewing that threatens the survival of countless creatures throughout Earth’s oceans. For years, we’ve known that the oceans absorb about a quarter of the carbon dioxide in our atmosphere. But with high carbon emissions worldwide, this silent killer is entering our seas at a staggering rate, raising the ocean’s acidity. It’s eating away at the skeletons and shells of marine creatures that are the foundation of the web of life. NOVA follows the scientists making breakthrough discoveries and seeking solutions. Visit a unique coral garden in Papua New Guinea that offers a glimpse of what the seas could be like a half-century from now. Can our experts crack the code of a rapidly changing ocean before it’s too late?

Watch the video:  http://www.pbs.org/wgbh/nova/earth/lethal-seas.html

2 thoughts on “NOVA – Lethal Seas (VIDEO)

  1. Throwing nature out of balance is disastrous – could very well be leading to a ‘rapid event.’ The coral is trying to warn us.

    Another good science series: ‘Earth: Power of the Planet’ (BBC).

    The ‘Oceans’ episode talks about the ocean conveyor. It starts in Arctic ocean where the heavy cold water sinks to the depths, pushing the conveyor. Although it takes 1000 years for a conveyor cycle to completely circle the globe, the conveyor is the mother of all currents.

    As Arctic waters warm, it is possible they would no longer sink, would lose the force to propel the conveyor. Geologists have discerned this has occurred once during Earth’s history. The oceans stagnated, produced lethal gas, killing all sea life. Then the burgeoning lethal gas lifted from the oceans and filled the atmosphere, killing all life on land as well.

    But no worries. Life, as we know it, will be over before the conveyor grinds to a halt.

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    • Interesting, I haven’t seen that series yet. It depicts a Canfield ocean scenario of severe anoxia (oxygen depletion) and euxinia (hydrogen sulfide accumulation) that wiped out 96% of marine species as well as most land vertebrates and insects during the Permian extinction event some 250 million years ago (a.k.a. “the great dying”). The ocean acidification which we’re seeing now, and which is the focus of this NOVA documentary, is consistent with the early stages of a Canfield ocean. Scary stuff.

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