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Runaway Daily
Posts Tagged 'desertification'
MAD and Runaway Climate Change
Posted on May 1, 2011 in International competition
NCAR 2030-2039 drought projection
During the Cold War, one of the leading ideas and acronyms was MAD: Mutually Assured Destruction. The idea was for both sides (the US and the then-USSR) to have so many nukes that it would be, well, MAD for either side to start anything serious. A nuclear exchange would utterly destroy both sides.
Today, we have a MAD-type situation with carbon emissions. The major polluters – the US and China in the first rank – are each emitting enough CO2 to put us beyond the “safe” limit of +2C of total warming. (We’ve already had +0.8C, and are starting to suffer serious consequences, with at least +0.6C in the pipeline if emissions stopped tomorrow.) Europe and European Russia, together, make up a third major player that roughly equals the US and China in CO2 emissions.
Why “Runaway”?
Posted on March 5, 2010 in What is RCC
“Runaway climate change” is what happens when global warming becomes self-sustaining. A global warming spiral kicks in if:
- The environment absorbs less CO2. About 50% of our current emissions are absorbed by the environment – roughly half of that by the oceans, the other half by plants on land. This uptake of CO2 by the environment may already be in decline.
- Reflection of sunlight drops. As snow and ice cover retreat – as cover is smaller in geographic extent, or seasonal cover lasts for less of the year – dark ground and even darker water are exposed, which absorb sunlight, further warming the earth.
- More CO2 and methane are emitted from nature. Soils, forests, peat, the seas, organic deposits in permafrost, and methane clathrates all emit some CO2 and methane. As the environment warms, “natural” emissions increase.
