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Global warming of 1.5°C

Source(s):  Intergovernmental Panel on Climate Change (IPCC)

An IPCC special report on the impacts of global warming of 1.5 °C above pre-industrial levels and related global greenhouse gas emission pathways, in the context of strengthening the global response to the threat of climate change, sustainable development, and efforts to eradicate poverty

This Special Report assesses the available scientific, technical and socio-economic literature relevant to global warming of 1.5°C and for the comparison between global warming of 1.5°C and 2°C above pre-industrial levels.  While limiting global warming to 1.5ºC would require rapid, far-reaching and unprecedented changes in all aspects of society, it would yield clear benefits to people and natural ecosystems and could go hand in hand with ensuring a more sustainable and equitable society. 

The report highlights a number of climate change impacts that could be avoided by limiting global warming to 1.5ºC compared to 2ºC, or more. For instance, by 2100, global sea level rise would be 10 cm lower with global warming of 1.5°C compared with 2°C. The likelihood of an Arctic Ocean free of sea ice in summer would be once per century with global warming of 1.5°C, compared with at least once per decade with 2°C. Coral reefs would decline by 70-90 percent with global warming of 1.5°C, whereas virtually all (> 99 percent) would be lost with 2ºC. Limiting global warming would also give people and ecosystems more room to adapt and remain below relevant risk thresholds.



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  • Global warming of 1.5°C
  • Publication date 2018
  • Number of pages 34

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