Already, greenhouse gas levels in the atmosphere are high enough to guarantee climate disruption for decades if not centuries, scientists warn in a report from theThat’s on top of the deadly heat waves, gargantuan hurricanes and other weather extremes that are happening now, and are likely to become more severe.
The IPCC report comes just three months before a major U.N. climate conference known as COP26 in Glasgow, Scotland, where nations will be under pressure to pledge much more ambitious climate action, and substantial financing to go with it. “I hope today’s IPCC report will be a wake-up call for the world to take action now, before we meet in Glasgow in November for the critical COP26 summit.”Emissions “unequivocally caused by human activities” have already pushed the average global temperature up 1.1C from its pre-industrial average—and would have raised it 0.5C further without the tempering effect of pollution in the atmosphere, the report says.
Any further warming will also boost the intensity and frequency of heat extremes and heavy rainfall, as well as droughts in some regions. Because temperatures fluctuate from year to year, scientists measure climate warming in terms of 20-year averages. It is already too late to prevent these particular changes. The best the world can do is to slow them down so that countries have more time to prepare and adapt.
If the world does not cut emissions dramatically, but continues the current trajectory, the rise could be 2.0C by 2060 and 2.7C by the century’s end.
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