Oceans

New evidence links rapid sea level rise 14,500 years ago to icebergs breaking off Antarctica. 
Credit: Frank Roedel, Alfred Wegener Institute

Some 14,600 years ago, sea levels rose 6.5 feet in just a century, thanks to Antarctica's melting glaciers. It could happen again, say researchers.

livescience.com - by Becky Oskin - May 28, 2014

Antarctica's melting glaciers launched so many icebergs into the ocean 14,600 years ago that sea level rose 6.5 feet (2 meters) in just 100 years, a new study reports. The results are the first direct evidence for dramatic melting in Antarctica's past — the same as predictions for its future.

"The Antarctic Ice Sheet had been considered to be fairly stable and kind of boring in how it retreated," said study co-author Peter Clark, a climate scientist at Oregon State University. "This shows the ice sheet is much more dynamic and episodic, and contributes to rapid sea-level rise."

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A lemon damselfish finding shelter in coral. Exposure to CO2 will make it more adventurous, and endanger its life. Photograph: Bates Littlehales/Corbis

theguardian.com - by Oliver Milman - April 13, 2014

Escalating carbon dioxide emissions will cause fish to lose their fear of predators, potentially damaging the entire marine food chain, joint Australian and US research has found.

A study by the Australian Institute of Marine Science, James Cook University and the Georgia Institute of Technology found the behavior of fish would be “seriously affected” by greater exposure to CO2.

Researchers studied the behavior of coral reef fish at naturally occurring CO2 vents in Milne Bay, in eastern Papua New Guinea.

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CLICK HERE - STUDY - Behavioural impairment in reef fishes caused by ocean acidification at CO2 seeps

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earth-policy.org - March 27, 2014

The world fish catch is a measure of the productivity and health of the oceanic ecosystem that covers 70 percent of the earth's surface. The extent to which world demand for seafood is outrunning the sustainable yield of fisheries can be seen in shrinking fish stocks, declining catches, and collapsing fisheries.

Seafood plays a vital role in world food security. Roughly 3 billion people get about 20 percent of their animal protein from fishery products.

The world fish catch has hovered around 90 million tons over the last 20 years.

The wild fish catch per person has dropped dramatically, from 17 kilograms (37.5 pounds) per person at its height in 1988 to 13 kilograms in 2012—a 37-year low.

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A new study finds that the oceans could be holding the missing heat from global warming.  Photo by Alexis DUCLOS/Gamma-Rapho via Getty Images

Greenhouse gas emissions have been rising, but warming has plateaued in recent years. It turns out the heat is likely being absorbed by the ocean depths.

science.time.com - by Bryan Walsh - November 1, 2013

. . . the oceans depths seem to be soaking up the excess heat energy created by the accumulation of greenhouse gases. Researchers led by Yair Rosenthal at Rutgers University reconstructed temperatures in one part of the Pacific Ocean and found that its middle depths have been warming some 15 times faster over the past 60 years than at any other time over the past 10,000 years. It’s as if the oceans have been acting as a battery, absorbing the excess charge created by the greenhouse effect, which leaves less to warm the surface of the planet, where we’d notice it.

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