David Black and associates have just (Oct 2007) published a new paper showing a reconstruction of SST from Cariaco sediments using Mg-Ca for the period 1221-1990 (thanks to Eduardo Zorita for alerting me to the study.) In this case, I am happily able to report that the relevant data was archived at WDCP contemporary with […]
In our recent discussion of the Arabian Sea G Bulloides series, I noticed a remarkable increase in the coarse fraction percentage in the top 1.3 cm of the critical RC2730 core. Willis has also commented on this. In core 2730, there is a correlation of 0.91 between the fraction of coarse particles and the percentage […]
One of the reasons why scientists have been so quick to use tree ring information despite all the problems is that, for the most part, there is excellent dating control on tree ring chronologies, something which can be problematic in other proxies. Today I want to document some notes on dating the Arabian Sea G […]
As a sort of Methadone replacement for Mann’s bristlecone PC1 (which uses Graybill’s strip bark chronologies), two Esper foxtail chronologies (Upper Wright Lakes and Boreal Plateau) have come into use by the Team. These two chronologies were used separately in the small Esper network (two of only 7 or so medieval chronologies) making a very […]
I’ve done an interesting exercise today in which I’ve tried to do an estimated cross-section of Tree 31 – the one with the highly discrepant core widths. Pete has some new pictures and site information that I haven’t seen, so it will be interesting to see how they reconcile.
So far, I’ve received preliminary measurement data on 8 trees – all trees with Graybill tags. Today I’m providing some notes based on a first look at this data. As noted before, the archive identifications do not match the Graybill tags. Pete obtained some information which has enabled us to make a limited concordance. We […]
I’ve got some preliminary measurement data back on several trees with Graybill tags in digital form. The dendro lab is working on cross-dating this week. The measurement data for our Tree #31 (Graybill 84-56), which Pete Holzmann posted a picture of earlier today, is very interesting. This is a strip-bark tree – remember that the […]
Christine Hallman of the University of Arizona LTRR has 4 photographs from Almagre from the Graybill collection. Although we didn’t have these matches in mind, there are some beautiful matches in Pete Holzmann’s photos, which Pete has collated below.
As I mentioned yesterday, Malcolm Hughes and/or the University of Arizona Laboratory for Tree-Ring Research had gone to the trouble of blocking my IP address from accessing their website. Thanks to the help of a couple of CA readers, I was able to circumvent the block. This is the sort of petty behavior that gives […]
I hope that many of you have visited Pete Holzmann’s photo gallery here. If you click on each picture on this page, you get a separate “gallery”. Today, I’m going to post up a quick overview together with a few maps.
Climate Audit 