Equilibrium climate sensitivity experiments using EC-Earth3-LR model — Surface Air Temperature data

Three experiments was conducted using a EC-Earth model with the EC-Earth3-LR configuration (REF), which couples atmosphere, land, ocean and sea-ice components. First, we performed a pre-industrial (PI) control simulation (E280) using pre-industrial forcing, holding atmospheric constituents constant at 1850 levels (e.g., CO₂ concentration at 280 ppm). This simulation was initialized by a pre-run steady restart file (from a 500-year pre-industrial control simulation) and ran for 2000 years. We also conducted two sensitivity experiments (E400 and E560) by adjusting the CO₂ concentration to 400 ppm and 560 ppm, respectively, at the start year of the E280 experiment, and continued for over 3000 years (3069 years for E400, and 3013 years for E560). For our statistical analysis, we only considered the integration periods after the spin-up, using the last 2000-year outputs from the three simulations. The dataset contains Earth system model results from EC-Earth3 presented in the study by Cao et al. (2023). Cao, N., Zhang, Q., Wang, Z., Power, K.E., &amp; Liu, C. (2023). The non-negligible impact of internal multi-centennial climate variability on estimating equilibrium climate change. Submitted to <em>Geophysical Research Letters</em>. <strong>Model configuration</strong><br> Time periods: 2000-year time slice for all three experiments<br> ESM configuration: EC-Earth3-LR<br> Horizontal resolution: ~1.125° (~125 km) <strong>Available data</strong><br> Annual mean data for Surface Air Temperature data.本研究采用搭载EC-Earth3-LR配置（参考试验，REF）的EC-Earth模式开展三组试验，该模式耦合了大气、陆面、海洋与海冰分量。首先，我们采用工业革命前强迫场开展工业革命前（PI）控制模拟试验（E280），将大气成分固定在1850年的水平（例如二氧化碳浓度维持280 ppm）。该模拟以500年工业革命前控制模拟得到的预运行稳态重启文件初始化，积分时长为2000年。我们还开展了两组敏感性试验（E400与E560）：分别在E280试验的起始年份将二氧化碳浓度调整为400 ppm与560 ppm，两组试验的积分时长均超过3000年（E400为3069年，E560为3013年）。针对本研究的统计分析，我们仅选取自旋调整后的积分时段，使用三组模拟的最后2000年输出数据。 本数据集包含Cao等（2023）研究中使用的EC-Earth3地球系统模式结果。 Cao, N., Zhang, Q., Wang, Z., Power, K.E. & Liu, C. (2023). 《内部多年代际气候变率对平衡气候变化估算的不可忽视影响》，已提交至《Geophysical Research Letters》（地球物理研究快报）。 **模型配置** 时间周期：三组试验均采用2000年时间切片 地球系统模式（Earth System Model，ESM）配置：EC-Earth3-LR 水平分辨率：约1.125°（约125 km） **可用数据** 地表气温年平均数据。