Absolute dating examples

08 Feb

and AR5 reports "Each of the last three decades has been successively warmer at the Earth’s surface than any preceding decade since 1850 (see Figure SPM.1).

Global mean surface temperature change from 1880 to 2017, relative to the 1951–1980 mean.

The black line is the global annual mean and the red line is the five-year lowess smooth.

Consistent with Schmidt's comment, the NASA / NOAA announcement stated that "[g]lobally-averaged temperatures in 2016 were 1.78 degrees Fahrenheit (0.99 degrees Celsius) warmer than the mid-20th century mean" and that the impact of El Niño warming was estimated to have "increased the annual global temperature anomaly for 2016 by 0.2 degrees Fahrenheit (0.12 degrees Celsius)." Comments from climate scientists reported in The Washington Post showed strong agreement in attributing the warming primarily to anthropogenic climate change, with some contribution from El Niño warming, though there were differing views on the significance of individual records.

Deke Arndt leads the monitoring group at NOAA's National Centers for Environmental Information and offered an analogy in a report on NPR: "The long-term warming is a lot like riding up an escalator over time.

In the Northern Hemisphere, 1983–2012 was likely the warmest 30-year period of the last 1400 years (medium confidence)".

Global surface temperature change for the period 1980–2004.

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