Our directory of things of interest

University Directory

Odds that recent warming is natural are slim

  • Written by  Olivia Edward
  • Published in Climate
Odds that recent warming is natural are slim Shutterstock
01 Jun
2014
New analysis of temperature records dating back to 1500 all but rules out possibility that global warming during the industrial era is just a natural fluctuation in the Earth’s climate

Carried out by McGill University’s Shaun Lovejoy, the study used ‘multi-proxy climate reconstructions’ developed by scientists in recent years to estimate historical temperatures. Lovejoy then applied fluctuation-analysis techniques from non-linear geophysics to examine the temperature variations over wide ranges of time scales.

The results indicated that the hypothesis that global warming since 1880 is due to natural variability can be ruled out ‘with confidence levels greater than 99 per cent, and most likely greater than 99.9 per cent’, Lovejoy said.

‘This study will be a blow to any remaining climate-change deniers,’ he continued. ‘Their two most convincing arguments – that the warming is natural in origin, and that the computer models are wrong – are either directly contradicted by this analysis, or simply do not apply to it.

‘We’ve had a huge fluctuation in average temperature since 1880 – on the order of about 0.9°C,’ he concluded. ‘This study shows that the odds of that being caused by natural fluctuations are less than one in a 100 and are likely to be less than one in a 1,000.’

This story was published in the June 2014 edition of Geographical Magazine

Related items

NEVER MISS A STORY - Follow Geographical on Social

Want to stay up to date with breaking Geographical stories? Join the thousands following us on Twitter, Facebook and Instagram and stay informed about the world.

More articles in NATURE...

Geophoto

With guaranteed sunshine, bright blue skies and not a hint…

Oceans

A review of coral-saving methods is helping communities decide which…

Polar

A seven-year study of Patagonia’s ice sheets has revealed the…

Climate

The environmental impact of Bitcoin is higher than its virtual…

Geophoto

With a camera in everyone’s pocket, the once rarified world…

Climate

The idea of the Earth as a self-regulating, living organism…

Oceans

A temporary fishing ban has been imposed by the European…

Wildlife

A look at the contribution of hippos to the savannah…

Wildlife

The new app encourages young children to connect with the…

Energy

A type of panel has been invented that can generate…

Tectonics

In the 4th century BC, Aristotle proposed that earthquakes were…

Climate

The Chartered Institution of Water and Environmental Management pledges to achieve net…

Tectonics

Earthquakes from time immemorial have attracted the attention of the…

Tectonics

A planned kayaking expedition in Nepal took on a whole…

Tectonics

Scientists from Bristol University are working in conjunction with EDF…

Tectonics

In the 1930s, Charles Richter developed a simple scale for…

Tectonics

Researchers at Colombia University have answered a question that has…