World's climate about to enter 'uncharted territory' as it passes 1C of warming

Global warming milestone is one of three climate records set to be broken in 2015, says UK Met Office

Climate change is set to pass the milestone of 1C of warming since pre-industrial times by the end of 2015, representing “uncharted territory” according to scientists at the UK’s Met Office.

2015 is also set to be the hottest on record, as the temperatures are so far beating past records “by a country mile”, they said. The World Meteorological Organization further announced on Monday that 2016 would be the first year in which the concentration of carbon dioxide in the atmosphere is over 400ppm on average, due to the continued burning of fossil fuels.

The trio of landmarks comes just three weeks ahead of a crunch UN summit in Paris where world leaders including Barack Obama, Xi Jinping and David Cameron meet in Paris in a bid to reach a new deal on cutting emissions.

Campaign sign up

The Met Office’s data from January to September 2015 already shows global average temperatures have risen by 1C for the first time compared to pre-industrial times. The rise is due to the “unequivocal” influence of increasing carbon emissions combined with the El Niño climate phenomenon currently under way. The Met Office expects the full-year temperature for 2015 to remain above 1C. It was below 0.9C in 2014, marking a sharp rise in climate terms.

“This is the first time we’re set to reach the 1C marker and it’s clear that it is human influence driving our modern climate into uncharted territory,” said Stephen Belcher, director of the Met Office’s Hadley Centre, said. “We have passed the halfway mark to the 2C target.”

The announcement of symbolic milestones in the run up to the Paris summit will increase pressure on negotiators to deliver a strong deal to avert the catastrophic global warming expected beyond 2C of warming.

“Mother Nature has been kind to the French, but it should not be that way,” said Prof Myles Allen, at the University of Oxford, referring to the impetus the milestones should give to the conference hosted in Paris. “International negotiations on climate change should not be in hoc to what happens ... in the preceding nine months.” In any case, he said: “The last three months of 2015 would have to be really odd to change [projections of unprecedented warming for 2015] as we are beating the records by a country mile.”

Amber Rudd, the UK’s energy and climate change secretary, said: “Climate change is one of the most serious threats we face, not just to the environment, but to our economic prosperity, poverty eradication and global security. That’s why I want an agreement on a global deal in Paris. Pledges to reduce emissions made by countries [are] just the beginning. We need to ensure that as the costs of clean energy fall, countries can be more ambitious with their climate targets.”

Climate change is clear in the Central England Temperature record, which is the longest in the world and stretches back to 1772, said Ed Hawkins, a climate scientist at the University of Reading. “We can see the fingerprint of global warming in our own backyard. Central England has warmed 20% more than the global average [as land warms faster than oceans] and we expect that to continue.”

The impacts of climate change are analysed in other research presented on Monday by the UK’s Avoid project. It found that, compared to unchecked global warming, keeping the temperature rise below 2C would reduce heatwaves by 89%, flooding by 76%, cropland decline by 41% and water stress by 26%.

Prof Joanna Haigh, at Imperial College London and part of the Avoid team, said the last major UN climate summit in Denmark in 2009 failed, making Paris crucial in preventing widespread damage: “Copenhagen was generally considered a complete disaster, so it is very important that countries get together at Paris.”

Belcher said 4C of warming would be much more harmful than simply doubling the impacts expected with 2C. He said the European heatwave of 2003, which led to 70,000 deaths, would be “a rather mild summer” in a 4C world.

The Met Office report also showed that the world’s “carbon budget” – the maximum CO2 that can be emitted over time to keep below 2C – was already two-thirds used up by the end of 2014. But only one-third of the sea-level rise expected from 2C of warming – 60cm by 2100 – has so far occurred, because of the time it takes for large ice sheets to melt.

Prof Andrew Shepherd, at the University of Leeds, said a recent Nasa study indicating that ice mass grew in Antarctica from 2003-2008 was contradicted by 57 other studies and had just a 5-10% chance of being a correct prediction.

Fossil fuel ticker


Damian Carrington

The GuardianTramp

Related Content

Article image
Global warming should be called global heating, says key scientist
UK Met Office professor tells UN summit Earth’s ‘energy balance’ is changing

Jonathan Watts

13, Dec, 2018 @11:48 AM

Article image
World's climate pledges not yet enough to avoid dangerous warming – UN
Analysis of plans put forward by nearly 150 countries suggests temperatures will reach just under 3C by the end of the century rather than 2C target

Fiona Harvey

30, Oct, 2015 @9:22 AM

Article image
Paris climate pledges 'will only delay dangerous warming by two years'
Earth will reach 2C warming threshold by 2038 based on carbon pledges made by 36 countries so far, rather than 2036 without any cuts, analysis show

Arthur Neslen and Karl Mathiesen

03, Jun, 2015 @11:44 AM

Article image
Donald Trump says US could re-enter Paris climate deal
In ITV interview US president also says he would take tougher stand on Brexit than Theresa May

Graham Ruddick

29, Jan, 2018 @12:02 AM

Article image
Islamic leaders issue bold call for rapid phase out of fossil fuels
Religious scholars, experts and teachers from around the world unite to make emotive declaration on climate change ahead of crucial Paris summit

Arthur Neslen

18, Aug, 2015 @12:20 PM

Article image
India unveils global solar alliance of 120 countries at Paris climate summit
Narendra Modi announces a new alliance of nations and industry on large-scale expansion of solar energy use in the tropics and beyond

Arthur Neslen

30, Nov, 2015 @4:24 PM

Article image
Paris climate change agreement: the world's greatest diplomatic success
With all 196 nations having a say, the UN climate deal, with all its frustrations and drama, has proven that compromise works for the planet

Fiona Harvey in Paris

14, Dec, 2015 @7:51 AM

Article image
The world's climate pledges are impressive - but still not enough
Pledges from 149 countries to reduce their emissions already take us half way to the target. Four key agreements in Paris could close the gap to a 2C world

Michael Jacobs

16, Oct, 2015 @10:58 AM

Article image
Keep fossil fuels in the ground to stop climate change | George Monbiot
George Monbiot: Once coal, oil and gas are produced, they will be used. And yet, after 23 years of UN negotiations there have been almost no steps taken to stop the production – rather than the use of – fossil fuels

George Monbiot

10, Mar, 2015 @12:00 PM

Article image
Christians set out on climate 'pilgrimage' from London to Paris
Members of different denominations embark on a two week long march to the Paris climate change talks to raise awareness of environmental issues

Emma Howard

13, Nov, 2015 @1:56 PM