By JR on Friday, February 12, 2016
Phil the deceiver is back
I have had a fair bit of fun with Phil Plait's writings over the years. He is not even clever in his deceptions. Below he hails a new study as refuting the skeptical claim that scientists at NOAA and elsewhere have been "fiddling" the historical temperature record. So I did my usual trick and looked up the study. It does not do what Phil wants it to do. It covers only the last ten years so is quite irrelevant to what skeptics say. Phil also implies that the new study shows ongoing warming. But it doesn't even attempt to do that. What a farce. I wonder what drives Phil? A hunger for approval, probably: Pretty infantile. The study Phil eulogizes is here
A common claim by climate change deniers is that scientists have been “altering” ground-based temperature data to make it look like the Earth is warming. This claim—which is not just wrong, but exactly wrong, as I’ll get to in a sec—has gotten more traction than most others offered by the forces of anti-science.
Rep. Lamar Smith, R-Texas, has been using this false claim as a blunt hammer against scientists in NOAA, for example, holding hearing after hearing trying to pin charges of conspiracy on them. But of course he’s wrong and is wasting huge amounts of taxpayer money pursuing a lie. As I’ve written before, the scientists aren’t “altering” the data, they’re correcting them.
A new paper has come out reinforcing this. Researchers from Berkeley, the University of York, and NOAA have looked at the temperatures recorded at stations across the U.S. They assessed the corrections being applied to the data and have confirmed their accuracy. In other words, despite Smith’s claims, the techniques the scientists are using to calibrate the data are solid.
The basic idea is this: There are temperature stations all over the U.S., and many have been in use for more than a century. However, over the years, some have been moved, replaced, or their environment has changed. This, of course, changes the temperature they record.
To account for that, scientists apply a correction to the data to make sure that they are comparing apples to apples when looking at modern measurements versus older ones. But how do they know if the corrections are accurate?
Actually, there are quite a few ways, but in the new study the researchers looked at more modern stations that are known to be quite accurate and compared them to the data from nearby older stations during the 12-year period where the two different systems were both in operation at the same time. As was expected, the uncorrected data from the older stations didn’t match the newer ones well. However, when the corrections were applied, the older stations did in fact match the newer ones much better. This shows that the corrections being applied are in fact making the data more accurate.
Smith and his allies want you to think that scientists are nefariously altering the data, but that’s not the case. Calibrating data isn’t “altering” it. Think of it more like editing typos and bad grammar. Once those are gone, you get a far better picture of what’s actually happening*.