Replication #4: Tree Ring Site Selection Criteria

Mann et al. [2000] listed 5 quality control criteria, which were said to have been applied in MBH98 for the inclusion of tree ring sites. These criteria were again referred to in the MBH Corrigendum in July 2004. In total, the information in the SI to MBH98 showed the use of 394 sites, either as individual proxies or as a component of a principal component network. I have been able to identify original data at WDCP for 331 out of 333 non-Vaganov sites used in MBH98. 196 out of these 331 series failed one or more of the stated quality control tests. One Jacoby series failed the mean correlation test so spectacularly (mean correlation of only 0.045 between segments and archived chronology) that we contacted one of the originating authors (D’Arrigo) who requested WDCP to withdraw the data. More


This entry was written by Climate Audit, posted on Feb 21, 2005 at 5:11 PM, filed under Replication. Bookmark the permalink. Follow any comments here with the RSS feed for this post. Both comments and trackbacks are currently closed.

4 Comments

  1. Ed Snack
    Posted Feb 22, 2005 at 2:05 AM | Permalink

    Steve, the link at the end of the extract is not linking, page not found.

  2. John A
    Posted Feb 22, 2005 at 4:55 AM | Permalink

    Steve, The link to climate2003.com doesn’t work!

    Sorry about that – fixed now. , Steve

  3. TCO
    Posted Sep 11, 2005 at 2:05 PM | Permalink

    Maybe a second corrigendum is needed?

  4. survival
    Posted Apr 7, 2008 at 11:29 PM | Permalink

    TCO – you’re probably right. A second corrigendum is definitely needed.

    Steve, thanks for the interesting post.

    – Rick

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