Monday 23 November 2009

CRU emails no 21 - blocked publications and GIGO

GIGO stands for "garbage in, garbage out".

Here we have an unhappy camper:

The excuses seem to be becoming desperate. Unjustified assertion that I fail to understand "Myles' comments and/or work on trying the detect/attribute climate change" does not stop the attribution study being an error. The problem is that I do understand what is being done, and I am willing to say why it is GIGO.


Richard's statement makes it clear, to me at least, that he misunderstands Myles' comments and/or work on trying the detect/attribute climate change. As far as I understand it, the masking is applied to the model to remove those locations/times when there are no observations. This is quite different to removing those locations which do not match, in some way, with the observations - that would clearly be the wrong thing to do. To mask those that have no observations, however, is clearly the right thing to do - what is the point of attempting to detect a simulated signal of climate change over some part of (e.g.) the Southern Ocean if there are no observations there in which to detect the expected signal? That would clearly be pointless.

Yes it would. And I fully understand Myles' comments. Indeed, my comments clearly and unarguably relate to Myles comments. But, as my response states, Myles' comments do not alter the fact that the masked data and the unmasked data contain demonstrated false trends. And the masking may introduce other spurious trends. So, the conducted attribution study is pointless because it is GIGO. Ad hominem insults don't change that. And nor does the use of peer review to block my publication of the facts of these matters.


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