Lewandowsky and Oreskes: normal service resumed
Updated on May 15, 2015 by Bishop Hill
For those who have been following the unfolding saga of the latest Lew paper, the said work of art has now been published at Global Environmental Change. There is little that will cause anyone any great surprise - it's all out of the standard Lewandowsky playbook: strawman following nonsense following outright falsehood. Take the case he outlines for why there is no pause:
Claims about a “pause” typically invoke a period commencing in 1998; the top panel of the figure shows that that year saw particularly high temperatures owing to an extreme El Niño event. When this single outlying year is omitted (as illustrated in the bottom panel), the purported pause in warming is no longer apparent. Statistically, what one observes is a decrease in the rate of warming—a slowdown, if you will—but this slowdown is at most modest: during the last 15 years (1999–2013) the linear trend is .13 °C/decade, compared to the trend for the overall period (1970–2013) which is .18 °C/decade. It is only when 1998 is arbitrarily used as the starting point to define the “pause” that the recent rate of global warming has been appreciably lower (.10 °C/decade) than the long-term trend.