It looks like Steve McIntyre has stooped low enough to using sock puppets. Tim Lambert caught him, and SM seems to have admitted it. Tut tut! And in sci.env too, not only at Tims blog. We also discover who "Per" was, though the answer doesn't appear to be especially interesting.
SM's puppetry was suspected at the time: Nigel rears his ugly head again, I see. Are you a colleague of McKittrick's by any chance, Nigel? The only time you make an appearance here is to defend him... as David Ball put it.