The GISS divergence problem: Ocean Heat Content

The GISS divergence problem: Ocean Heat Content. Butter wouldn’t melt in citizen-scientist Bob Tisdale’s mouth, would it? He’s back with new proof that there’s no global warming and that them gubmint scientists is stupid. Anthony Watts approvingly notes the alleged “[denialist] reality versus [Goddard Institute for Space Studies] projection disparity” and declares “a GISS miss by a country mile.” Game over, yuck, yuck, yuck!

Tisdale’s claim is that Ocean Heat Content (OHC) hasn’t risen as fast as an old GISS model projected (note that this was not a prediction). Why? Well, because he can slap a projected straight line (Bob still loves ’em) on a chart that rises faster than the observations. Therefore, warmists are liars and their computers are too. This handily side-steps the real issue: Ocean Heat Content is unquestionably rising. We call this global warming.

Except… Even Anthony has to give Bob a nudge in the comments for failing to admit that his citizen-science fair project is showing “anomalies” i.e. deviations from the trend and not the trend itself. Sure, the target man on the street won’t spot it, but it’s like plastering “kick me” all over your own back for the benefit of informed scientific observers like Tamino, to whom Bob’s posts are like candy to a baby. Tamino indulges his sweet tooth in Favorite Denier Tricks, or How to Hide the Incline.

So how does Tisdale think he’s proven that the alarmist GISS projection of increasing OHC doesn’t match the measured increase? By using the classic denialist trick of showing the projection over a very particularly chosen time period from on a very particularly chosen point. This allows him to imply that OHC is flat but the GISS projection is increasingly divergent from “reality”. Anthony is silent on the this half of Bob’s deception because in the denialist playbook cherry-picking is enthusiastically endorsed.

The following graphic collates Tamino’s deconstruction of Bob Tisdale’s game-playing. Perhaps Bob should submit his work to the National Science Fair’s Beeville branch?

New cherry-picking and tunnel vision from Bob "Magoo" Tisdale. Deconstruction by Tamino.

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