Category Archives: Mann et al 2008

Mann et al 2008 Proxies

Sep 3, 2008 – 8:19 PM

Here are 5 graphics which show all the Mann 2008 proxies in a consistent format, highlighting two periods 950-1100 and 1850-1980. My software only permits 300 gif images per gif-movie, so 5 parts. The graphics show nicely how few series actually have low-freq variability and how few series are really contributing to any HS-ness. The […]

By Stephen McIntyre | Tagged , | Comments (124)

Mann et al 2008: Korttajärvi

Sep 3, 2008 – 1:14 PM

Larry Huldén writes: The Finnish lake sediments can not be used for temperature interpretations in the 18th to 20th century unless you know exactly the history of the regional lake environment conditions. We have 180,000 lakes in Finland. It is very easy to cherry pick among them and say that it is a random sample. […]

By Stephen McIntyre | Also posted in Proxies | Tagged , | Comments (17)

Mann 2008 MWP Proxies: Punta Laguna

Sep 3, 2008 – 10:13 AM

I’m spending a little extra time examining the “new” Mann 2008 MWP non-dendro “proxies”. There are 4 series from varved lake sediments in Punta Laguna, Mexico: two dO18 and two C13 series, each for a different gastropod species. Original data is archived at WDCP here. I compared this data to Mann’s versions and noticed some […]

By Stephen McIntyre | Tagged , , | Comments (46)

Mann 2008 Non-Dendro MWP Proxies

Sep 3, 2008 – 6:41 AM

Once again, Mann has claimed that he can obtain a “reliable long-term record” without tree ring data, a claim that, as previously noted, is eerily reminiscent of a similar untrue claim made 10 years ago. Ten years ago, we could not simply eliminate all the tree-ring data from our network because we did not have […]

By Stephen McIntyre | Tagged , | Comments (50)

Mann et al 2008

Sep 2, 2008 – 10:06 AM

Notice of a new reconstruction by Mann and the Team is in many press clippings today, citing a PNAS article that is not (as I write) online. Rather than clutter other threads, here’s a placeholder thread pending my own response which may take a few days. Update Sep 2, 2008 2:15 pm: Article online here […]

By Stephen McIntyre | Tagged , | Comments (135)