Is a question Open Mind asks re yet more Wattism. And so I looked and found the absurd Another paper refutes the Mann made hockey stick – MWP was ≈1°C warmer than current temperatures. To support his headline, AW highlights:
the conclusion that the early MCA was warmer than the late 20th century by ~ 1 °C
but this is an old trick, and his commenters (well, the ones that are awake and not entranced) quickly see through it:
No, that’s not what this paper says. What they’ve done is to obtain a seasonal analysis of temperatures. They say that *if* you looked at shell evidence for MWP temperatures *without* doing the seasonal analysis you might get the *incorrect* impression that MWP temperatures were on average around 1C higher than the 1960-1990 period. (If you just took a sample of shells of the right age and analyzed their 18O signal, you’d be getting a biased estimate, because more shell is made by these animals in the summer than in the winter).
Their seasonal analysis shows that summers were around 2C warmer, and winters around 2C cooler. In other words, although the seasonal range was greater, on average, the MWP was *no warmer* than the 1960-1990 baseline.
And of course the 2000-2012 period has been substantially above the 1960-1990 baseline.
So I’m afraid this paper says exactly the opposite of what you were hoping it said.
Which makes me quite cheerful. AW has always been posting pap for quite a while now (I think once upon a time when he started the surfacestations stuff there may have been some substance), but this level of drivel shows desperation.
* Webcite of AW’s original when I wrote this (I’m learning, you know).