September sets alarming global temperature record and negates a favorite denier talking point

Joe Romm writes: September 2017 smashed multiple climate records, alarming scientists and further negating a favorite talking point of climate science deniers.

First and foremost, last month was the hottest September ever recorded in the four decades of satellite data analyzed by the University of Alabama at Huntsville (UAH).

Equally amazing, “of the 20 warmest monthly global average temperatures in the satellite record, only September 2017 was not during an El Niño,” reports Dr. John Christy, director of UAH’s Earth System Science Center — and an infamous climate science misinformer.

Global records for hottest month or year typically occur when the underlying human-caused global warming trend gets a temporary boost from an El Niño’s enhanced warming in the tropical Pacific. So when temperature records are set in the absence of an El Niño, it is another sign that the underlying human-caused global warming trend is stronger than ever. [Continue reading…]

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