Table 1 Arctica islandica clumped isotope results compared to previous calibrations “mixed” = combined samples from multiple specimens, number codes (e.g. “29” or “6A”) = material from one individual. “Ais” = Arctica islandica. Significant ∆47 and temperature offsets are labeled in bold. cc = calcite, ar = aragonite
Sample Culturing temperature 47 (I-CDES; ± 95%CL) N Offset from Anderson Offset from Meinicke Offset from Guo (cc) Offset from Guo (ar)
Ais1 1.1 ± 0.2°C mixed 0.695 ± 0.019‰ 34
3 0.661 ± 0.023‰ 13
29 0.688 ± 0.025‰ 15
6A 0.684 ± 0.028‰ 11
6B 0.649 ± 0.026‰ 9
TOTAL
0.682 ± 0.010‰
82
+0.008‰ -2.12°C +0.002‰ -0.61°C +0.003‰ -0.75°C −0.016‰ +4.48°C
Ais3
3.2 ± 0.4°C
mixed
0.667 ± 0.010‰
72
+0.001‰ -0.27°C −0.005‰ +1.24°C −0.006‰ +1.57°C −0.023‰ +6.80°C
Ais15
15 ± 0.3°C
mixed
0.637 ± 0.009‰
57
+0.013‰ -3.63°C +0.008‰ -2.10°C +0.004‰ -0.99°C −0.013‰ +4.25°C
Ais18 18 ± 0.3°C mixed 0.635 ± 0.010‰ 39
67 0.647 ± 0.024‰ 9
89 0.640 ± 0.028‰ 8
111 0.630 ± 0.022‰ 11
TOTAL
0.637 ± 0.005‰
67
+0.021‰ -6.63°C +0.016‰ -5.10°C +0.012‰ -3.99°C −0.004‰ +1.25°C