Tag Archives: mcgregor

New Data and Upside-Down Moberg

Nov 25, 2014 – 11:48 AM

I’ve been re-examining SH proxies for some time now, both in connection with PAGES2K and out of intrinsic relevance.  In today’s post, I’ll report on a new (relatively) high-resolution series from  the Arabian Sea offshore Pakistan (Boll et al 2014, Late Holocene primary productivity and sea surface temperature variations in the northeastern Arabian Sea: implications […]

By Stephen McIntyre | Posted in Moberg [2005], Ocean sediment, Uncategorized | Also tagged , , , , , , , | Comments (11)

Alkenone Divergence

Apr 9, 2013 – 12:07 PM

While there are disappointingly few high-resolution alkenone ocean cores with 20th century resolution, there are a few. Given the importance of this class of proxy in Marcott et al, one would have thought the performance of high-resolution alkenones in the 20th century would have been of interest to Marcott et al, but they were silent […]

By Stephen McIntyre | Posted in Ocean sediment, Proxies | Also tagged , , , , | Comments (35)

More Z-Score Opportunism

Apr 14, 2009 – 8:38 AM

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 […]

By Stephen McIntyre | Posted in Data, Medieval, Ocean sediment, Trouet 2009 | Also tagged , , , , , | Comments (23)

ABC: Global warming puts fish stocks at risk

Nov 27, 2007 – 5:05 PM

While trawling for high-resolution ocean sediment cores, I noticed an interesting core offshore Morocco, reported by McGregor et al (Science 2007) earlier this year. This study was released just prior to IPCC complete with press release. Can’t we all think back to a quieter time when a scientist having labored to produce a detailed analysis […]

By Stephen McIntyre | Posted in Ocean sediment | Also tagged , , | Comments (75)