Human-Caused Warming Likely Led to Recent Streak of Record-Breaking Temperatures, New Study Finds

It is “extremely unlikely” 2014, 2015 and 2016 would have been the warmest consecutive years on record without the influence of human-caused climate change, according to the authors of a new study.

Temperature records were first broken in 2014, when that year became the hottest year since global temperature records began in 1880. These temperatures were then surpassed in 2015 and 2016, making last year the hottest year ever recorded. In 2016, the average global temperature across land and ocean surface areas was 0.94 degrees Celsius (1.69 degrees Fahrenheit) above the 20th century average of 13.9 degrees Celsius (57.0 degrees Fahrenheit), according to NOAA.

Combining historical temperature data and state-of-the-art climate model simulations, the new study finds the likelihood of experiencing consecutive record-breaking global temperatures from 2014 to 2016 without the effects of human-caused climate change is no greater than 0.03 percent and the likelihood of three consecutive record-breaking years happening any time since 2000 is no more than 0.7 percent. When anthropogenic warming is considered, the likelihood of three consecutive record-breaking years happening any time since 2000 rises to as high as 50 percent, according to the new study.

That means human-caused climate change is very likely to blame for the three consecutive record-hot years, according to the new study accepted for publication in Geophysical Research Letters, a journal of the American Geophysical Union.

Read more at American Geophysical Union

Image: A screenshot from an animation of global temperatures since 1880. Scientists at NASA’s Goddard Institute for Space Studies (GISS) have found that Earth’s average surface temperature has risen about 1.1 degrees Celsius (2.0 degrees Fahrenheit) since the late-19th century. (Credit: NASA / Scientific Visualization Studio)