LDN - Other News

U.N. sounds 'deafening' warning on climate change

[August 09, 2021] By Nina Chestney and Andrea Januta

(Reuters) -The United Nations panel on climate change told the world on Monday that global warming was dangerously close to being out of control – and that humans were "unequivocally" to blame.

Already, greenhouse gas levels in the atmosphere are high enough to guarantee climate disruption for decades if not centuries, the report from the scientists of the Intergovernmental Panel on Climate Change (IPCC) https://www.ipcc.ch/report/ar6/wg1 warned.

In other words, the deadly heat waves, gargantuan hurricanes and other weather extremes that are already happening will only become more severe.

U.N. Secretary-General António Guterres described the report as a "code red for humanity".

"The alarm bells are deafening," he said in a statement. "This report must sound a death knell for coal and fossil fuels, before they destroy our planet."

In three months' time, the U.N. COP26 climate conference in Glasgow, Scotland, will try to wring much more ambitious climate action out of the nations of the world, and the money to go with it.

Drawing on more than 14,000 scientific studies, the IPCC report gives the most comprehensive and detailed picture yet of how climate change is altering the natural world -- and what could still be ahead.

Unless immediate, rapid and large-scale action is taken to reduce emissions, the report says, the average global temperature is likely to reach or cross the 1.5-degree Celsius (2.7 degrees Fahrenheit) warming threshold within 20 years.

The pledges to cut emissions https://reut.rs/3ywxDyE made so far are nowhere near enough to start reducing level of greenhouse gases - mostly carbon dioxide (CO2) from burning fossil fuels - accumulated in the atmosphere.

Further warming could mean that in some places, people could die just from going outside.

"The more we push the climate system ... the greater the odds we cross thresholds that we can only poorly project," said IPCC co-author Bob Kopp, a climate scientist at Rutgers University.

IRREVERSIBLE

Some changes are already "locked in". Greenland’s sheet of land-ice is "virtually certain" to continue melting, and raising the sea level, which will continue to rise for centuries to come as the oceans warm and expand.

[to top of second column]

A man looks on outside a house in an area affected by floods caused by heavy rainfall in Bad Muenstereifel, Germany, July 19, 2021. REUTERS/Wolfgang Rattay/

“We are now committed to some aspects of climate change, some of which are irreversible for hundreds to thousands of years,” said IPCC co-author Tamsin Edwards, a climate scientist at King’s College London. “But the more we limit warming, the more we can avoid or slow down those changes.”

But even to slow climate change, the report says, the world is running out of time.

If emissions are slashed in the next decade, average temperatures could still be up 1.5C by 2040 and possibly 1.6C by 2060 before stabilising.

And if, instead the world continues on its the current trajectory, the rise could be 2.0C by 2060 and 2.7C by the century’s end.

The Earth has not been that warm since the Pliocene Epoch roughly 3 million years ago -- when humanity's first ancestors were appearing, and the oceans were 25 metres (82 feet) higher than they are today.

It could get even worse, if warming triggers feedback loops that release even more climate-warming carbon emissions -- such as the melting of Arctic permafrost or the dieback of global forests.

Under these high-emissions scenarios, Earth could broil at temperatures 4.4C above the preindustrial average by the last two decades of this century.

(Reporting by Nina Chestney in London and Andrea Januta in Guerneville, California; Additional reporting by Jake Spring in Brasilia, Valerie Volcovici in Washington, and Emma Farge in Geneva; Editing by Katy Daigle, Lisa Shumaker and Kevin Liffey)

Back to top