Carbon rise could cause cloud tipping point

(4 Mar 2019) The planet’s temperature could zoom in an ever more greenhouse world, as researchers identify a dangerous possible cloud tipping point.

Climate scientists have confirmed a high-level hazard, a cloud tipping point, that could send global warming into a dramatic upwards spiral.

If carbon dioxide concentrations in the atmosphere become high enough, the clouds that shade and cool some of the tropical and subtropical oceans could become unstable and disperse. More radiation would slam into the ocean and the coasts, and surface temperatures could soar as high as 8°C above the levels for most of human history.

And this dramatic spike would be independent of any warming directly linked to the steady rise in carbon dioxide concentrations themselves, the scientists warn.

In Paris in 2015, a total of 195 nations vowed to take steps to contain global warming to “well below” a maximum of 2°C above the average before the start of the Industrial Revolution, powered by the exploitation of fossil fuels.

In the last 200 years, levels of the greenhouse gas carbon dioxide in the atmosphere have increased from 288 parts per million to around 410 ppm and the average global temperature has already increased by about 1°C.

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, 4 Mar 2019: Carbon rise could cause cloud tipping point