Here are the ocean proxies used in Trouet et al. As usual in Team studies, it is a total mystery how they are selected. Trouet et al is a bit different from usual Team studies in that it argues for a MWP-LIA global reorganization, something that I’ll get to soon. Today, I want to chat […]
By Stephen McIntyre
|
Also posted in Ocean sediment, Trouet 2009
|
Tagged alkenone, Keigwin, MD99-2275, ocean, ocean sediment, PL07-73 BC, Proxies, Sargasso Sea, sediment, sicre, Trouet
|
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 […]
Some Japanese articles have been in the news recently. CA readers will be interested in the fact that CA was cited (thanks to a CA reader for the heads up). Here’s a graphic from their SI showing differences between Gaspé versions. As CA readers know, similar discrepancies occur for bristlecones between Ababneh and Graybill or […]
Yesterday, I noted that Steig had criticised previous developers of Antarctic gridded temperature data for not having “paid much attention” to West Antarctica (e.g. the NASA GISS trend map left the area blank due to lack of data meeting their quality standards) and reproached his predecessors (including, it seems, even Hansen) for “calculating with their […]
Mann said: Although 484 (~40%) pass the temperature screening process over the full (1850–1995) calibration interval, one would expect that no more than ~150 (13%) of the proxy series would pass the screening procedure described above by chance alone. Reader DC said: Of the 484 proxies passing the 1850-1995 significance test, 342 also passed both […]
Mannian confidence intervals have always been a mystery with MBH99 confidence interval methodology remaining an intractable mystery that has defeated all reverse engineering (and engineering) efforts by UC, Jean S and myself to date (though we haven’t picked up this file for a while.) I was very interested to see how Mann 2008 calculated confidence […]
The old Sodankyla church was built in 1689. Nine cores from beams at this church have been measured and archived. Briffa 2008 used one of 9 cores. Why only one of 9? Your guess is as good as mine.
I have some happier news to report from Phil Trans B, which, unlike the International Journal of Climatology, has a data policy and takes it seriously. Phil Trans B is a science journal published by the Royal Society as opposed to a climate science journal published by the Royal Meteorological Society. Last summer, I reported […]
Question One of my follow-up FOI questions on Oct 31, 2008 about the gridded Briffa et al MXD data was the following: I examined Gridbox 7(132.5E 72.5N) in more detail. It contains one series: omoloyla. The gridded series (#7) has values from 1400-1991, but the underlying omoloyla chronology at ITRDB only goes from 1496 to […]
Climate Audit 