Monday, November 02, 2009

Is Phil Jones supressing data?

On the show tonight Tim Ball and the host Victoria Taft tried to hone in on Phil Jones somehow suppressing or losing data. I wasn't as up on this subject as I could have been, but quickly found this page and this recent statement from Jones. Like much of what Ball claimed, he was wrong and didn't seem to look very hard for the full story:
No one, it seems, cares to read what we put up on the CRU web page. These people just make up motives for what we might or might not have done.

Almost all the data we have in the CRU archive is exactly the same as in the Global Historical Climatology Network (GHCN) archive used by the NOAA National Climatic Data Center [seehere and here].

The original raw data are not “lost.” I could reconstruct what we had from U.S. Department of Energy reports we published in the mid-1980s. I would start with the GHCN data. I know that the effort would be a complete waste of time, though. I may get around to it some time. The documentation of what we’ve done is all in the literature.

If we have “lost” any data it is the following:

1. Station series for sites that in the 1980s we deemed then to be affected by either urban biases or by numerous site moves, that were either not correctable or not worth doing as there were other series in the region.

2. The original data for sites for which we made appropriate adjustments in the temperature data in the 1980s. We still have our adjusted data, of course, and these along with all other sites that didn’t need adjusting.

3. Since the 1980s as colleagues and National Meteorological Services (NMSs) have produced adjusted series for regions and or countries, then we replaced the data we had with the better series.

In the papers, I’ve always said that homogeneity adjustments are best produced by NMSs. A good example of this is the work by Lucie Vincent in Canada. Here we just replaced what data we had for the 200+ sites she sorted out.

The CRUTEM3 data for land look much like the GHCN and NASA Goddard Institute for Space Studies data for the same domains.

Apart from a figure in the IPCC Fourth Assessment Report (AR4) showing this, there is also this paper from Geophysical Research Letters in 2005 by Russ Vose et al. Figure 2 is similar to the AR4 plot.

I think if it hadn’t been this issue, the Competitive Enterprise Institute would have dreamt up something else!


Anonymous said...

No raw data kept ( not lost, just thrown away? ). Read para 4.

Confidentiality agreements, can't produce those either.

Derek Tipp said...

If he is not supressing data then why has he refused to produce his data and methodology to Steve McIntyre when he asked for it?

Here is a link to the details:

Dano said...

hen why has he refused to produce his data and methodology to Steve McIntyre when he asked for it?

Derek, either you are hopelessly lost and using old talking points, or are spreading misinformation. Ol' Steve had the data since '04.




Anonymous said...

You can get the data you are looking for in this file: