Category Archives: Ocean sediment

2 mm Ocean Sediment Studies

Nov 10, 2006 – 6:55 AM

Lloyd Keigwin’s Sargasso Sea study was done using 1 cm core intervals; the Arabian Sea RC2730 percentage G bulloides was calculated using 2 mm core intervals (although slower sedimentation meant that the time intervals were mitigated somewhat.) see http://www.climateaudit.org/?p=898 . G bulloides percentage is interesting a measure of upwelling, but isn’t a proxy for SST. […]

By Stephen McIntyre | Also posted in Proxies | Comments (9)

Juckes and the Sargasso Sea

Nov 8, 2006 – 10:22 AM

Keigwin’s Sargasso Sea temperature reconstruction, used in Moberg et al 2005, was de-selected by Juckes in what he represented to be the Moberg CVM composite and in making the Union composite (although he managed to use Tornetrask twice ?!? under different names). Although he de-selected the Sargasso Sea temperature reconstruction, he used Moberg’s Arabian Sea […]

By Stephen McIntyre | Also posted in Juckes et al 2006, Medieval | Tagged , , , | Comments (16)

New Millennial Warm Pool Foraminifera Study

Oct 12, 2006 – 3:25 PM

Hot off the press this week is a study on foraminera over the last millennium in the Indo-Pacific Warm Pool – something that you’d think would be relevant to Hansen’s attempts to splice modern instrumental records to core tops ending in the Holocene Optimum. Newton et al 2006 have the following abstract:

By Stephen McIntyre | Also posted in Medieval | Tagged , , | Comments (35)

Moberg’s G. Bulloides

Oct 5, 2006 – 11:52 AM

Last year, when Moberg was published, I pointed out witha slightly arched eyebrow that one of the two most important contributors to any 20th century HS-ness in Moberg was the increasing percentage of subpolar foraminifera (G. Bulloides) in the Arabian Sea – intuitively not a direct indicator of warming. Having visited the foraminifera literature in […]

By Stephen McIntyre | Also posted in Moberg [2005] | Tagged | Comments (14)

Moberg #5: Arabian Sea glob. bulloides

Feb 22, 2005 – 8:42 AM

One of the two strongest contributors to higher temperatures in Moberg’s 20th century proxies is higher incidence of subpolar glob. bulloides

By Stephen McIntyre | Also posted in Moberg [2005] | Tagged | Comments (5)

Post-1980 Proxies #3: Chesapeake Bay Mg/Ca

Feb 17, 2005 – 9:10 AM

The Chesapeake Bay Mg/Ca proxy goes to late 1995 and is used in both Moberg et al [2005] and Mann and Jones [2003] for the proxy reconstructions up to 1980. Figure 1 below shows that its post-1980 behavior does not show an exceptional response to supposedly unprecedented temperature. Figure 1. Chesapeake Bay Spring SST. Re-plotted […]

By Stephen McIntyre | Also posted in Moberg [2005], Multiproxy Studies, Post-1980 Proxies | Comments (8)