The long Pause may well come to an end by this winter, when an el Niño event is expected in the equatorial eastern Pacific, causing global temperature to rise quite sharply. The el Niños of 1998, 2007, and 2010 are visible in the graph. El Niños occur about every three or four years, though no one is entirely sure what triggers them. They cause a temporary spike in temperature, often followed by a sharp drop during the la Niña phase, as can be seen in 1999, 2008, and 2011-2012, where there was a “double-dip” la Niña.
The ratio of el Niños to la Niñas tends to fall during the 30-year negative or cooling phases of the Pacific Decadal Oscillation, the latest of which began in late 2001. So, though the Pause may pause for a few months at the turn of the year, it may well resume late in 2015.
Either way, it is ever clearer that global warming has not been happening at anything like the rate predicted by the climate models, and is not at all likely to occur even at the much-reduced rate now predicted. There could be as little as 1 Cº global warming this century, not the 3-4 Cº predicted by the IPCC.
Key facts about global temperature:
- The RSS satellite dataset shows no global warming at all for 213 months from August 1996 to April 2014. That is more than half the entire 423-month satellite record.
- The fastest centennial warming rate was in Central England from 1663-1762, at 0.9 Cº per century – before the industrial revolution began. It cannot have been our fault.
- The global warming trend since 1900 is equivalent to 0.8 Cº per century. This is well within natural variability and may not have much to do with us.
- The fastest warming trend lasting ten years or more occurred over the 40 years from 1694-1733 in Central England. It was equivalent to 4.3 Cº per century.
- Since 1950, when a human influence on global temperature first became theoretically possible, the global warming trend is equivalent to 1.2 Cº per century.
- The fastest warming rate lasting ten years or more since 1950 occurred over the 33 years from 1974 to 2006. It was equivalent to 2.0 Cº per century.
- In 1990, the IPCC’s mid-range prediction of the near-term warming trend was equivalent to 3.5 Cº per century.
- The global warming trend since 1990, when the IPCC wrote its first report, is equivalent to 1.4 Cº per century – two-fifths of what the IPCC had then predicted.
- In 2013 the IPCC’s new mid-range prediction of the near-term warming trend was for warming at a rate equivalent to 1.7 Cº per century – just half its 1990 prediction.
- Though the IPCC has cut its near-term warming prediction, it has not cut its centennial warming prediction of 3.7 Cº warming to 2100 on business as usual.
- The IPCC’s prediction of 3.7 Cº warming by 2100 is more than twice the greatest rate of warming lasting more than ten years that has been measured since 1950.
- The IPCC’s 3.7 Cº-by-2100 prediction is more than three times the observed real-world warming trend since we might in theory have begun influencing it in 1950.
- Since 1 January 2001, the dawn of the new millennium, the warming trend on the dataset of five major datasets is zero – 0.0 Cº per century. No warming for 13 years 3 months.
- Recent extreme weather cannot be blamed on global warming, because there has not been any global warming. It is as simple as that.