The air is spoiled for 300 years into the future

10.04.2013



Photo: Getty Images

Mankind has managed to change the climate so that his recovery will be needed century, scientists believe. In order to make the climate of the planet back to the indicators of XX century. Need a few hundred years, scientists believe. Climatologists believe that the favorable scenario is possible only if humanity will remove carbon dioxide from the atmosphere, which threw the industry throughout the XX century.

"Emissions from human activities account for about 9 billion tons of CO2 per year, half of this amount remains in the atmosphere, the rest is absorbed by the ocean and communicates in other ways. To return to the climatic conditions of the twentieth century, we will need to remove more carbon dioxide from the atmosphere than was emitted initially, "- said Andrew McDougall from the Canadian University of Victoria at the European Geosciences Union in Vienna.

McDougall said that as a result of the preliminary computer modeling, scientists have two possible scenarios. At best, the temperature and weather indicators in the XX. recover until the end of XXIV — XXV in the middle., ocean acidity will return to normal for a hundred years earlier.

But even on optimistic assumptions, some changes have already irreversible. For example, the Greenland glacier melt completely, while sea levels will rise by about 7 meters. However, unless special efforts, the climatic conditions of XX century. will be restored only after a thousand years.

A favorable scenario is possible only under the condition that humanity will not only reduce CO2 emissions into the atmosphere, but now will begin to extract carbon dioxide from it and dispose of it. For example, right now there are technologies that allow you to freeze dry ice and flood the it into the ocean at great depths, where the high-pressure carbon dioxide does not dissolve in water or evaporate.

Climate scientists say that since 1910, the average global temperature has risen by one degree. This means a huge increase in the total amount of heat energy stored in the atmosphere and oceans. Scientists estimate that the probability of a hot summer in a separate region for the last 50 years has increased by five times.
 


Andrei Sidelnikov

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