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(GIST OF SCIENCE REPORTER) Risk of Passing Multiple Climate Tipping Points Escalates above 1.5°C Global Warming
(GIST OF SCIENCE REPORTER) Risk of Passing Multiple Climate Tipping Points Escalates above 1.5°C Global Warming
[September-2022]
Risk of Passing Multiple Climate Tipping Points Escalates above 1.5°C Global Warming
- Multiple climate tipping points could be triggered if global temperature rises beyond 1.5°C above pre-industrial levels, according to a major new analysis published in the journal Science.
- Even at current levels of global heating, the world is already at risk of passing five dangerous climate tipping points, and risks increase with each tenth of a degree of further warming.
About:
- An international research team synthesised evidence for tipping points, their temperature thresholds, timescales, and impacts from a comprehensive review of over 200 papers published since 2008 when climate tipping points were first rigorously defined. They have increased the list of potential tipping points from nine to sixteen.
- The Sixth Assessment Report of the Intergovernmental Panel on Climate Change (IPCC), stated that risks of triggering climate tipping points become high by around 2°C above preindustrial temperatures and very high by 2.5-4°C.
- This new analysis indicates that Earth may have already left a ‘safe’ climate state when temperatures exceeded approximately 1°C warming.
- A conclusion of the research is therefore that even the United Nations’ Paris Agreement goal to limit warming to well below 2°C and preferably 1.5°C is not enough to fully avoid dangerous climate change. According to the assessment, tipping point likelihood increases markedly in the ‘Paris range’ of 1.5-2°C warming, with even higher risks beyond 2°C.
- The study provides strong scientific support for the Paris Agreement and associated efforts to limit global warming to 1.5°C because it shows that the risk of tipping points escalates beyond this level.
- To have a 50% chance of achieving 1.5°C and thus limiting tipping point risks, global greenhouse gas emissions must be cut by half by 2030, reaching net zero by 2050.
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Courtesy: Science Reporter