Southern Hemisphere winter sea ice concentration simulated by HadCM3 to best explain the early last interglacial Antarctic isotope peak

The file contains Southern Hemisphere winter (September) sea ice concentration (sic) from a simulation performed using the isotope-enabled HadCM3 climate model forced with early last interglacial boundary conditions, centred approximately 128,000 years ago. The resulting sic represents a reduction in winter sea ice area of approximately 54% relative to pre-industrial and is proposed as the best explanation for the Antarctic ice core data from 128,000 years ago. The spatial pattern of sea ice retreat was determined using a large ensemble of model experiments and a pattern search optimization approach to match the last interglacial ice core isotope peak. Further details can be found in the published manuscript (https://doi.org/10.1002/2017GL074594).

本数据集包含同位素耦合HadCM3气候模型在早末次间冰期边界条件强迫下的模拟结果中的相关数据，该模拟时段以约12.8万年前为中心，输出内容为南半球冬季（9月）海冰浓度（sea ice concentration, SIC）。该模拟得到的海冰浓度对应的冬季海冰面积相较于工业化前水平减少了约54%，且该结果被认为是解释12.8万年前南极冰芯数据的最优方案。海冰消退的空间分布特征通过多成员模式集合试验与模式搜索优化方法确定，以匹配末次间冰期冰芯的同位素峰值。更多详细信息可参阅已发表的相关论文（https://doi.org/10.1002/2017GL074594）。