Relative abundance of coccosphere-units of sediment core GIK23400-3

Age given in calendar years. Coccosphere-unit: Conversion of coccoliths to hypothetical coccospheres by taking an average number of coccoliths per coccosphere.年龄以日历年（calendar years）标注。 颗石球换算单位（Coccosphere-unit）：通过计算每个颗石球（coccosphere）平均含有的颗石（coccolith）数量，将颗石换算为假想颗石球。