We’ve frequently observed that the reduction of data to standard deviation units (z-scores) is often associated with seemingly opportunistic orientation of the data sets. Often this is buried in the multivariate methodology. Principal components and RegEM can both function to opportunistically provide orientations to “proxies”. In Mann 2008, we saw pretty examples of proxies being […]
On April 10, I was notified by NOAA that a little bit of data from Trouet was now online at NOAA WDCP. The archive is the absolute minimum; even Science would require them to archive this data if asked. However, it is totally inadequate for replication. However, every little bit of data helps and here’s […]
About 2 weeks ago, I observed that the PR (Paleoclimate Reconstruction) Challengers, stung by various challenges to the non-transparency of their data and methods, had promised that, by April 2009, they would, among other things, make a website containing: – Collection of reconstruction codes, documentation, and related data. Interestingly, on April Fool’s Day itself, NOAA […]
The other series in Trouet that contributes to their NAO reconstruction is the Morocco chronology from Esper the non-Archiver. In the Scotland speleo series, we observed an awkward detrending step prior to the NAO reconstruction. In the Morocco series, there proves to be some awkward splices: a splice of two different series versions at a […]
The two proxies that carry the water in the Trouet NAO reconstruction are the Baker speleothem in Scotland and Esper’s tree ring chronology in Morocco. The briefest examination of the Scotland speleothem shows that the version used in Trouet et al had been previously adjusted through detrending from the MWP to the present. In the […]
Trouet et al was released on April 2, 2009 with an SI that did not include any data. Discussion began here on April 3 in the comments here and later that day I posted on it here observing: Unfortunately, the authors failed to provide any digital data citations (see for example AGU policies on this, […]
Following excellent notes transferred from a comment by Ryan O, who has been doing excellent analyses of the Steigian swamp.
Jeff has made some progress on the basis that PC was applied to the AVHRR data before RegEM. See a good post here . This is obviously inconsistent with claims at realclimate.org by Gavin Schmidt and Eric Steig, but we’ve known for a while that their explanations are not accurate. This is a different exercise […]
Esper the non-Archiver is Trouet’s supervisor (see url.), so I’ve taken the liberty here of ascribing this clever April Fool’s prank to Esper, though undoubtedly Trouet deserves some credit for her role in pulling off the prank. In a recent post, I alluded to the point that the England precipitation index shown in the Trouet […]
Here are two quotes. The first is from Trouet et al 2009: The increased pressure difference between the Azores High (+3 hPa) and the Icelandic Low (–5 hPa) during positive NAO phases results in enhanced zonal flow, with stronger westerlies transporting warm air to the European continent. The axis of maximum moisture transport and the […]
Climate Audit 