Future prospects - Ice Ages and Interglacials: Measurements, Interpretation, and Models - page 347

Figure 11.10. Ice core records showing the LIA and MWP.
Figure 11.11. Sea surface temperatures in the Sargasso Sea (Keigwin, 1996).
MBH. While they intended to support MBH, the large differences between their
results and those of MBH seem to lead to the opposite conclusion. This brings
into doubt whether any reconstruction based on proxies is credible. McIntyre
examined the data in Esper et al. (2002) in considerable detail and wrote at length
on their analysis. The actual proxies examined by McIntyre are shown in Figure
11.12 , which could be described as a spaghetti diagram. McIntyre took a simple
average of all the proxies in Esper et al. (2002) and obtained Figure 11.13 .
Richey et al. (2007) used Mg/Ca analyses of the white variety of the planktic
foraminifera delta, which were obtained from the northern Gulf of Mexico as a
measure of historical sea surface temperatures. The results are shown in Figure