Know Your Limits
Yesterday saw a special event on the results of the Structured Expert Dialogue (SED) on the 2013-2015 review, which ended its work this February. ECO hears that it might have been this week’s “best show in town”. The SED found that the “guardrail” concept, where up to 2°C of warming is considered safe, is inadequate. Instead the long-term goal should be defined as a“defence line” and efforts should be made to draw the defence line as low as possible.
The SED has identified 10 key messages. Here are 3 key ones:
1) Even 2°C warming (the limit agreed in Cancún) would result in catastrophic impacts, slow down economic growth, and significantly hinder poverty reduction efforts.
2) The world is not on a path towards a scenario below 2°C . Past and recent global greenhouse gas emissions have accelerated. So, yes, an emissions gap exists and the current Cancún pledges are more consistent with pathways limiting global warming to 3-4°C.
3) Keeping warming below 2°C is still achievable through deep emission cuts. These cuts can be achieved through full decarbonisation of energy systems, along with scaling-up of low-carbon energy technologies by approximately 90% by 2050 (compared to 2010). Importantly, these measures would not significantly affect global GDP growth.
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