Scientific evidence accumulating since the IPCC’s Fourth Assessment Report reveals that global warming is accelerating, at times far beyond projections outlined in earlier studies, including the latest IPCC Report. New modelling studies are providing updated and more detailed indications of the impacts of continued warming.
The emerging evidence is that important aspects of climate change seem to have been underestimated and the impacts are being felt sooner. For example, early signs of change suggest that the less than 1°C of global warming that the world has experienced to date may have already triggered the first tipping point of the Earth’s climate system – a seasonally ice-free Arctic Ocean. This process could open the gates to rapid and abrupt climate change, rather than the gradual changes that have been projected so far.
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