In some areas of ocean acidification has reached the level predicted by the end of the century,

Coral reefs suffer perhaps more than anyone. (Photo by Ruth D. Gates, Peter J. Edmunds.)

December 23.19 experts from five research organizations conducted extensive field studies of ocean acidification using sensors developed at Scripps Institution of Oceanography (USA).

An important step to understanding the response of specific ecosystems to changes in the chemistry of sea water due to the fact that the oceans absorb more carbon dioxide.

Ocean acidification — the theme is quite new. Able to assess the extent of the problem only in the last decade. It is believed that the oceans absorb about one-third of carbon dioxide produced by man and his machines. As we step up, the natural level of carbon dioxide in water has long been overcome.

The most important consequence — reduction of carbonate forms that are needed marine invertebrates (corals, goad) to form skeletons. This effect is often modeled in the laboratory, but field work is not enough. Therefore, scientists have "body kit" sensors 15 regions — from coral reefs in the South Pacific Ocean to the Mediterranean sea hydrothermal vents.

Found that in some places (for example, in the Antarctic and the Pacific near the Line Islands) tolerance range of pH values is much smaller than, say, in areas off the coast of California, where the vertical movement of water (upwelling). In some areas, the decrease in pH caused by emissions of greenhouse gases, is still within the natural fluctuations, and other areas have already reached a level of acidity that is predicted only at the end of the century.

In short, the difference is huge. It is quite clear that the assessment of the impact of ocean acidification on ecosystems — an extremely serious problem.

The researchers note that the level of acidification tall in some areas — is a good thing, because the organisms have a chance to begin to adapt to, Thuaboutother areas will experience in a hundred years. Prior to that, experts sounded the alarm, saying that acidification occurs too quickly.

Researchers used sensors and SeaFET SeapHOx, developed by a group of Todd Martz. They are capable of measuring pH and temperature in the upper 70-m layer of the ocean. Since 2009, scientists have created 52 such instrument. With their help, separate ecosystems studied by 13 research groups. Since the data of all projects accumulated at Mr. Martz, he came to the conclusion that it's time to synthesize measurement.

The study is published in the journal PLoS ONE.


Based on:Scripps Institution of Oceanography
Source: Kompyulenta

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