Table 2.
Uncertainties used for proxy-based temperatures in this study. The individual studies used to derive these values are in Supplemental Table 1.
| Archive Type | Proxy Type | Temperature uncertainty (°C) | ||
|---|---|---|---|---|
| Summer | Winter | Annual | ||
| marine sediment | alkenone | 1.7 | ||
| marine sediment | δ18O | 2.1 | ||
| marine sediment | Mg/Ca | 1.9 | 1.9 | 1.9 |
| multiple archives | TEX86 | 2.3 | ||
| marine sediment | foraminifera | 1.3 | 1.4 | 1.3 |
| marine sediment | dinocyst | 1.7 | 1.2 | 1.2 |
| multiple archives | diatom | 1.1 | ||
| marine sediment | radiolaria | 1.2 | ||
| multiple archives | pollen | 2.0 | 3.0 | 2.1 |
| multiple archives | GDGTa | 2.9 | ||
| multiple archives | stable isotopes | default | ||
| lake sediment | variousb | default | ||
| lake sediment | chironomid | 1.4 | ||
| glacier ice | variousc | default | ||
| midden | macrofossils | default | ||
| wood | tree ring width | default | ||
aMBT'5Me, MBT’'-CBT, MBT-CBT, MBT/CBT, Branched GDGT Fractional Abundance.
bBSi, TOC, chlorophyll, particle size, Mg/Ca, diatom, alkenone.
cmelt-layer frequency, borehole, gas, isotope diffusion, bubble frequency.