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Carnegie Study: Climate Requires Near-zero Emissions





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Scientists at the Carnegie Institution have just completed a study that has concluded the only way to stabilize the climate is to reduce carbon emissions to a near-zero level:
In the study, to be published in Geophysical Research Letters, climate scientists Ken Caldeira and Damon Matthews used an Earth system model at the Carnegie Institution’s Department of Global Ecology to simulate the response of the Earth’s climate to different levels of carbon dioxide emission over the next 500 years. ~snip~

The scientists investigated how much climate changes as a result of each individual emission of carbon dioxide, and found that each increment of emission leads to another increment of warming.

With emissions set to zero in the simulations, the level of carbon dioxide in the atmosphere slowly fell as carbon “sinks” such as the oceans and land vegetation absorbed the gas. Surprisingly, however, the model predicted that global temperatures would remain high for at least 500 years after carbon dioxide emissions ceased.

In our earlier article, Everything but the Oceans' Sink, we explored the connection between global warming and the inability of the Southern Ocean to absorb C02. Caldeira and Matthews' study further points to the connection between carbon sinks and the impact on climate stability.
Matthews and Caldeira found that to prevent the Earth from heating further, carbon dioxide emissions would, effectively, need to be eliminated...

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