Nasa: Earth is warming at a pace 'unprecedented in 1,000 years'

Nasa: Earth is warming at a pace 'unprecedented in 1,000 years'
Records of temperature that go back far further than 1800s suggest warming of recent decades is out of step with any period over the past millennium


The sun sets beyond visitors to Liberty Memorial as the temperature hovers around 100F in Kansas City, Missouri, last month. Photograph: Charlie Riedel/AP
Oliver Milman
@olliemilman
Tuesday 30 August 2016 20.00 AESTLast modified on Wednesday 31 August 201600.25 AES
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The planet is warming at a pace not experienced within the past 1,000 years, at least, making it “very unlikely” that the world will stay within a crucial temperature limit agreed by nations just last year, according to Nasa’s top climate scientist.

This year has already seen scorching heat around the world, with the average global temperature peaking at 1.38C above levels experienced in the 19th century, perilously close to the 1.5C limit agreed in the landmark Paris climate accord. July was the warmest month since modern record keeping began in 1880, with each month since October 2015 setting a new high mark for heat.

But Nasa said that records of temperature that go back far further, taken via analysis of ice cores and sediments, suggest that the warming of recent decades is out of step with any period over the past millennium.

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Proxy-based temperature reconstruction. Photograph: Nasa Earth Observatory
“In the last 30 years we’ve really moved into exceptional territory,” Gavin Schmidt, director of Nasa’s Goddard Institute for Space Studies, said. “It’s unprecedented in 1,000 years.

There’s no period that has the trend seen in the 20th century in terms of the inclination (of temperatures).”


https://www.theguardian.com/environ...mate-change-warning-earth-temperature-warming