(Table DR1) Isotope and Mg/Ca results from ODP Hole 184-1145B

Isotope analyses of G. ruber consisted of 7-8 shells in the 212-250 µm size fraction. One or two C. wuellerstorfi individuals were analyzed. For Mg/Ca analysis, approximately 25 shells (250-355 µm) were weighed, gently crushed, and cleaned using a multi-step reductive/oxidative procedure developed for trace element analysis (Boyle, Keigwin, 1985/6; doi:10.1016/0012-821X(85)90154-2) and subsequent revision (Rosenthal et al., 1995; doi:10.1016/0012-821X(95)00056-I).

红拟抱球虫（Globigerinoides ruber，G. ruber）的同位素分析采用其212~250 µm粒级的7~8枚壳体完成。本次研究同时分析了1~2枚伍氏圆片虫（Cibicides wuellerstorfi，C. wuellerstorfi）个体。针对镁钙比（Mg/Ca）分析，研究人员称取约25枚250~355 µm粒级的壳体，经轻柔破碎后，使用专为微量元素分析开发的多步还原-氧化前处理流程进行清洗（Boyle与Keigwin，1985/6；doi:10.1016/0012-821X(85)90154-2），并采用该方法的后续修订版本开展实验（Rosenthal等，1995；doi:10.1016/0012-821X(95)00056-I）。