Supplementary information
From the following article:
Gulf Stream density structure and transport during the past millennium
David C. Lund, Jean Lynch-Stieglitz and William B. Curry
Nature 444, 601-604(30 November 2006)
doi:10.1038/nature05277
Supplementary Notes
This file contains Supplementary Methods and Supplementary Data.
Supplementary Figure 1
Stable isotope analyses for the Florida Straits cores were based primarily on Cibicidoides species from the >250 
m size fraction.
Supplementary Figure 2
Stable isotope analyses for the Florida Straits cores were based primarily on Cibicidoides species from the >250 m size fraction.
Supplementary Figure 3
Quantification of the relationship between foraminiferal 
18O (18Oc) and seawater 
t.
Supplementary Figure 4
Comparison of core top foraminiferal and CTD density values from Dry Tortugas and Great Bahama Bank indicates the stable oxygen isotopic composition of the benthic foraminifera used in this study reliably record the density structure of the Florida Current.
Supplementary Figure 5
A shift in the level of no motion from 850 to 950 m during the Little Ice Age, but with the same shear, would produce a total volume transport of ~31 Sv, equal to the modern value.
Supplementary Figure 6
An isotopic depletion of the fresh-water end member results in a steeper 18Ow-S slope (top) which in turn alters the polynomial fit to the 18Oc -t data in the range occupied by the Dry Tortugas and Bahamas benthic 18Oc values (middle). The net effect is to increase density at Dry Tortugas more than the Bahamas, producing slightly higher transport values (~0.5 Sv) (bottom).
Supplementary Table 2
Great Bahama Bank Radiocarbon Ages
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