NOAA - Arctic & Northern Pacific Oceans Acidifying Faster Than Any Other Regions;

[hatrack]

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A National Oceanic and Atmospheric Administration map shows levels of dissolved aragonite, a key indicator of ocean acidity, at a depth of 50 meters. Bluer colors indicate less aragonite, a key compound from which marine shellfish produce their shells.

The Arctic Ocean and the northern Pacific Ocean, along with Antarctic waters, are acidifying faster than the rest of the world’s marine waters, a new National Oceanic and Atmospheric Administration-led study finds.

The study, which analyzed measurements from thousands of monitoring stations across the globe, found these bodies acidified faster as carbon dioxide absorbed from the atmosphere combines with natural sources of carbon swept into them by marine currents and held fast by low temperatures.

Ocean acidification is the chemical transformation seawater undergoes as it absorbs and stores more carbon. The increasingly acidic water more easily dissolves the calcium carbonate from which many marine species make their shells -- affecting not only commercially important shellfish, such as oysters and clams, but also smaller creatures, such as tiny pteropods, upon which marine food webs depend. That could upend entire ecosystems, harming other important species, including salmon.

The new study, published online in the journal Global Biogeochemical Cycles, uses data from 11,431 sampling stations to evaluate aragonite saturation levels in oceans worldwide -- the degree to which aragonite, a form of calcium carbonate that sea creatures use to build shells, is held in the water.

EDIT

http://www.adn.com/article/20151112/effects-acidification-especially-strong-ocean-waters-alaska-noaa-says

[TexasProgresive]

1. A hypothesis for the cause

The industrialization of China, Indochina and India with increase use of coal and petroleum. The CO2 being carried by the westerlies and the Japanese current acidifying the north Pacific and Arctic waters. That's what I think.