MIS 5e September sea-ice concentrations and summer SST anomalies (relative to the preindustrial) from HadGEM3 and HadCM3 model simulations

MIS 5e September sea-ice concentrations (SIC) and summer (JFM) SST anomalies, relative to the pre-industrial from the HadGEM3 and HadCM3 climate models were compared to proxy data to investigate how well state of the art model simulations match SIC and SST observations during past periods of warmer-than-present climate. The importance of including Heinrich 11 (H11) meltwater forcing was tested by incorporating different durations of North Atlantic freshwater hosing into the model runs. This dataset includes the netCDF files with the September SICs and summer SST anomalies for four model runs. The LIG run includes no H11 meltwater forcing. The three H11 runs include H11 meltwater forcing for either 250 or 1600 years and presents an average of the last 100 years of each simulation. Full details on the model set-up and parameters are available in Guarino et al. (2023, accepted) for the HadGEM3 simulations and Holloway et al. (2018) for the HadCM3 simulations.本研究将HadGEM3与HadCM3气候模式输出的、相对于工业化前基准的海洋同位素阶段5e（Marine Isotope Stage 5e, MIS 5e）9月海冰浓度（Sea Ice Concentrations, SIC）及夏季（JFM，即1-3月）海表温度异常（Sea Surface Temperature Anomalies）数据与代用资料进行对比，以探究当前顶尖气候模式模拟在暖于现代的古气候时期对海冰浓度与海表温度观测数据的复刻精度。本研究通过在模式运行中引入不同持续时长的北大西洋淡水注入强迫，测试纳入海因里希11号（Heinrich 11, H11）融水强迫的重要性。本数据集包含4组模式试验的9月海冰浓度与夏季海表温度异常的netCDF格式文件。其中末次间冰期（Last Interglacial, LIG）试验组未加入H11融水强迫；其余3组H11试验组分别施加了持续250年或1600年的H11融水强迫，并取每组模拟的最后100年数据作为平均结果。关于HadGEM3模式试验的详细设置与参数信息，可参阅Guarino等人（2023年，已接收）的研究；HadCM3模式试验的相关细节则可参考Holloway等人（2018年）的成果。