Donald Trump doesn’t know the difference between climate and weather

(CNN)At 8 p.m. Thursday, after a third straight day of golf at his Mar-a-Lago resort in Palm Beach, Florida, and the temperature was 72 degrees, President Donald Trump tweeted this:

The “logic” at work here is simple: How can climate change, aka global warming, be real if it is so cold outside?
    It’s the same sort of “logic” that led Oklahoma Sen. Jim Inhofe (R) to bring a snowball onto the Senate floor in late February 2015 as a supposed counterweight to claims of global warming. Toting his snowball in one hand, Inhofe, who was the chairman of the Environment and Public Works Committee at the time, said:
    “In case we have forgotten, because we keep hearing that 2014 has been the warmest year on record, I asked the chair, do you know what this is? It’s a snowball just from outside here. So it’s very, very cold out. Very unseasonable.”
    What Trump (and Inhofe) don’t seem to understand — or choose to ignore — is that “weather” and “climate” are not the same thing.
    Here’s a brief primer on the difference between the two, via NASA: “Weather is what conditions of the atmosphere are over a short period of time, and climate is how the atmosphere ‘behaves’ over relatively long periods of time.”
    That it is cold on any given day — or week! or month! — is not indicative of much of anything about the climate and whether it is warming or not. If the “weather = climate” logic held, a series of sweltering summer days could reasonably be concluded as incontrovertible evidence that the planet is getting warmer.
    Which, of course, it is. This past October was the second warmest October on record — and those records date back to the 1880s. The first 10 months of 2017 were, according to NASA, the second warmest 10 months ever — second only to — wait for it — 2016. This year is likely to be among the three warmest years in almost 140 years of record-keeping, according to the Weather Channel. Of the eight warmest years ever, all have come since 1998, according to the National Oceanic and Atmospheric Administration. (The eight warmest years, in order: 2016, 2015, 2014, 2010, 2013, 2005, 2009 and 1998.)
    You get the idea. All available evidence — and there are 137 years of it! — makes very, very, abundantly clear that the climate is changing. There’s also this bit of fact: 97% of climate scientists who have published papers on climate change believe not only that the globe is warming but also that the warming is very likely due to human activity.
    Trump is free to tweet whatever he likes. And he will continue to do so. But to use cold weather as some sort of rebuttal of broader climatological warming is not even close to accurate, factual or funny.

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