The thrust of [Tom] Karl’s paper is this: that far from staying flat since 1998, global temperatures have carried on rising. It’s just that scientists haven’t noticed before because they’ve been looking in the wrong place – on land, rather than in the sea where all the real heat action is happening.
And how did Karl et al notice what everyone else has missed until now? …
Essentially, [his] technique involves making adjustments to the raw temperature data (sound familiar?) and discovering – lo! – that the sceptics were wrong and the alarmists were right all along.
Karl’s paper makes much of the fact that the methods used for gathering sea temperature data have changed over the years: in the old days it used to involve buckets; more recently, engine intake thermometers. Hence his excuse for these magical “adjustments”. Apparently (amazingly, conveniently), the measurements used since 1998 have been “running cold” and therefore needed correcting in a (handy) upward direction in order to show what has really been happening to global warming. Once you realise this – global warming turns out to be as real and present and dangerous as ever it was.
As the GWPF reports there are several glaring problems with Karl’s paper, starting with the fact that it contradicts all the other surface temperature data sets and also satellite data (which clearly shows no warming post 1998). Also, without any plausible explanation, Karl also chooses not to use the data from the Argo array “that is our best coherent data set on ocean temperatures.” The suspicion naturally arises that this is because if Karl had used the Argo findings, they would have made his paper look ridiculous.