May 2016 was the hottest May on record.

You Just Lived Through the Hottest May on Record. And April. And March. And February. And January. And December.…

You Just Lived Through the Hottest May on Record. And April. And March. And February. And January. And December.…

Bad Astronomy
The entire universe in blog form
June 20 2016 8:45 AM

March … I Mean April… I Mean May 2016 Is the Sixth … I Mean Seventh… I Mean Eighth Temperature Record-Breaking Month in a Row

May global temperature anomalies
No human alive has seen a month of March April May like this before.

NASA GISS

N.B. If this article sounds familiar, it should. This has been happening so frequently I just copied the post for March April and updated it.

Phil Plait Phil Plait

Phil Plait writes Slate’s Bad Astronomy blog and is an astronomer, public speaker, science evangelizer, and author of Death From the Skies!  

October. November. December. January. February. March. April. And now May.

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For the sixth seventh eighth month in a row, we’ve had a month that has broken the global high temperature record. And not just broken it, but shattered it, blasting through it like the previous record wasn’t even there.

According to NASA’s Goddard Institute for Space Studies, March April May 2016 was the hottest March April May on record, going back 136 years. It was a staggering 1.28°C 1.11°C 0.93° C above average across the planet.* The previous March April May record, from 2010 2014, was 0.92° 0.87° 0.86° above average. This year took a huge jump over that.

Welcome to the new normal, and our new world.

As you can see from the map above, much of this incredible heat spike is located in the extreme northern latitudes. That is not good; it’s this region that’s most fragile to heating. Temperatures soaring to 7° or more above normal means more ice melting, a longer melting season, loss of thinner ice, loss of longer-term ice, and most alarmingly the dumping of billions of tons of fresh water into the saltier ocean which can and will disrupt the Earth’s ability to move that heat around.

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What’s going on? El Niño might be the obvious culprit, but in fact it’s only contributing a small amount of overall warming to the globe, probably around 0.1° C or so. That’s not nearly enough to account for this. It’s almost certain that even without El Niño we’d be experiencing record heat.

Most likely there is a confluence of events going on to produce this huge spike in temperature—latent heat in the Pacific waters, wind patterns distributing it, and more.

JMA temperatures
The Japanese Meteorological Agency measured similar temperatures as GISS (though it uses a different baseline for the average), and has May 2016 in a virtual tie for hottest May on record with 2015. Note the trend. See a "pause"? I don't.

Japanese Meteorological Agency

And underlying it all, stoking the fire, is us. Humans. Climate scientists—experts who have devoted their lives to studying and understanding how this all works—agree to an extraordinary degree that humans are responsible for the heating of our planet.

That’s why we’re seeing so many records lately; El Niño might produce a spike, but that spike is sitting on top of an upward trend, the physical manifestation of human induced global warming, driven mostly by our dumping 40 billion tons of carbon dioxide into the air every year.

Until our politicians recognize that this is a threat, and a very serious one, things are unlikely to change much. And the way I see it, the only way to get our politicians to recognize that is to change the politicians we have in office.

That’s a new world we need, and one I sincerely hope we make happen.

*GISS uses the temperatures from 1951–1980 to calculate the average. The Japanese Meteorological Agency uses 1981–2010, which gives different anomaly numbers, but the trend remains the same. Realistically, the range GISS uses is better; by 1981 global warming was already causing average temperatures to rise.

You may have noticed that the actual temperature anomaly for each month over March through May appears to be dropping; 1.28 to 1.11 to 0.93. That may be due to El Niño weakening, but it’s hard to know over such a short time period. Even if the trend continues, I’d bet 2016 will be the hottest year on record.