Auxiliary Material for

Northern and southern hemisphere controls on seasonal sea surface temperatures in the Indian Ocean during the last deglaciation
Yiming V. Wang1,2*, Guillaume Leduc1, Marcus Regenberg1, Nils Andersen2, Thomas Larsen2,3, Thomas Blanz1, Ralph R. Schneider1,2
1. Institute of Geosciences, Christian-Albrechts UniversitŠt zu Kiel, Ludewig-Meyn-Str. 10-14, 24118 Kiel, Germany
2. Leibniz-Laboratory for Radiometric Dating and Isotope Research, Christian-Albrechts University of Kiel, Max-Eyth-Str. 11-13, 24118 Kiel, Germany
3. Biogeodynamics and Biodiversity Group, Centre for Advanced Studies of Blanes (CEAB), Spanish Research Council (CSIC), 17300 Blanes, Catalonia, Spain

Paleoceanography, 2013


This auxiliary material includes three supplementary figures, which are cited in the main paper.

fs01 (Supplementary Figure 1): a) Shell weights of G. trilobus and G. ruber from core GIK16160-3; b) Shell weights of G.trilobus plotted with Mg/Ca of G. ruber; there was no correlations between the changes in weight and the Mg/Ca ratio; c) Variations of shell weights of G. trilobus throughout the core. These shells were handpicked from the 250-315 ?m size fraction for 60 samples of G. trilobus and 5 samples for G. ruber, each sample containing ~20 tests. Shells were weighed on a micro-balance (Satorius ME 5-OCE, ±1 µg error) and then the individual foraminifera specimen weight was calculated. Before weighing, foraminifera were gently cleaned by ultra-sonication in demineralized water (three times) and ethanol (two times).

fs02 (Supplementary Figure 2):: UKŐ37 SST records of GIK16160-3 and MD79257 [Bard et al., 1997] versus age. The original 14C dates of MD79257 was recalibrated based on Marine09 [Reimer et al., 2009] and calender age model were then obtained by polynomial fitting (the 5th order as this was used in the Bard et al., 1997). We also have recalibrated the SST records of MD79257 using Sonzongi et al., [1997] with a slope of 0.023 to be consistent with SST calibration for GIK16160-3. Two records show remarkable similarity for both SST mangtidue and rapid changes in the timing of deglaical.

fs03 (Supplementary Figure 3): G. ruber ?18O and ?13C records from GIK 16160-3.


References


Bard, E., F. Rostek, and C. Sonzogni (1997), Interhemispheric synchrony of the last deglaciation inferred from alkenone palaeothermometry, Nature, 385(6618), 707-710.
Reimer, P. J., et al. (2009), Intcal09 and Marine09 Radiocarbon Age Calibration Curves, 0-50,000 Years Cal Bp, Radiocarbon, 51(4), 1111-1150.
Sonzogni, C., E. Bard, F. Rostek, D. Dollfus, A. Rosell-Mele, and G. Eglinton (1997), Temperature and salinity effects on alkenone ratios measured in surface sediments from the Indian Ocean, Quat. Res., 47(3), 344-355.