Fig. 6
From: δ 18Osw estimate for Globigerinoides ruber from core-top sediments in the East China Sea
Comparison of δ 18Oc-derived calcification temperature with Mg/Ca-derived temperature. a Water column profile of Δ[CO3 2−] in the ECS. Calculation of the calcite saturation state Δ[CO3 2−] was accomplished via subtracting the carbonate ion concentration [CO3 2−] at saturation from the in situ [CO3 2−]. To compute the in situ [CO3 2−] with the program CO2sys.xls (Lewis and Wallace 1998), we used total alkalinity, TCO2, pH, and hydrographic water column data in the ECS (NODC Accession 0109919, http://data.nodc.noaa.gov/nodc/archive/metadata/approved/). Arrows indicate the water depths of cores analyzed in this study and by Sun et al. (2005), Lin et al. (2006), Chen et al. (2010), and Kubota et al. (2010). b δ 18Oc-derived calcification temperature and non-dissolution-corrected Mg/Ca-derived temperature plot. c δ 18Oc-derived calcification temperature and dissolution-corrected Mg/Ca-derived temperature plot. d δ 18Oc-derived calcification temperature and Mg/Ca-derived temperature plot. The dissolution-corrected Mg/Ca ratio was used for the deepest site, HR2, where Δ[CO3 2−] < 0 μmol kg−1. The other data were non-dissolution-corrected Mg/Ca ratios