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 […]
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 […]
UC writes in that there’s another Mannian problem: And GRL08 ( http://www.meteo.psu.edu/~mann/shared/articles/MannGRL08.pdf ) is the prologue. Tried this new smoother ( http://www.meteo.psu.edu/~mann/smoothing08/lowpassadaptive.m ) with HadCRUT monthly and f=0.0104, [smoothedbest,w0,w1,w2,msebest] = lowpassadaptive(HadM, 0.0104); got this figure, But the weights are [w0 w1 w2] ans = 0.4100 0 0.5500 Surprisingly, this does not agree with the text, […]
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 […]
I’m back from Italy and just wrote a post summarizing the trip. Unfortunately the blog crashed when I went to post it and I’ll have to re-write the post. Anyhow, we had a great trip. I see that Mann et al have a welcome-home present for us. I see that there are press releases announcing […]
Continuation of Koutsoyiannis et al 2008: On the credibility of climate predictions.
Sept 9: Updated to follow Hurricane Ike, and possible US impacts in the next 4-5 days The North Atlantic tropics are becoming very active as the calendar approaches the climatological peak of the season (September 11). With high sea-surface temperatures and generally favorable atmospheric conditions (i.e. low vertical shear), every circulation or puff of convection […]
Continuation of Sea Ice Stretch Run #2.
It’s late summer (or late winter in the SH) so it must be time to upgrade the blog to the latest and greatest WordPress edition. (why do I offer to do this? I must be mad) Climate Audit is current on a lowly version 2.2.1 and the latest version is 2.6.1 Much to my surprise, […]
In my post December 1986, I presented a histogram showing the GISS estimate of December 1986 minus the actual for GHCN stations in Europe and Russia. As noted, GISS under-estimated December 1986 for this region by a greater than 2 to 1 margin. The result was, when GISS combined multiple records for a single station, […]
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