MESACLIP: Nominal 1-degree CESM (low-resolution) simulations corresponding to high-resolution experiments
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Over the past six years, our research team consisting of scientists at Texas A&M University (TAMU) and the U.S. National Science Foundation National Center for Atmospheric Research (NSF NCAR) has made major breakthroughs in advancing high-resolution global climate modeling and prediction. We have completed several thousand years of climate simulations at a tropical cyclone (TC) permitting and ocean-eddy-rich resolution (hereafter simply referred to as CESM-HR) as part of our NSF-funded project entitled "Understanding the Role of MESoscale Atmosphere-Ocean Interactions in Seasonal-to-Decadal CLImate Prediction (MESACLIP)". Among others, we completed a 500-year preindustrial control (PI-CTRL) simulation forced by a perpetual climate forcing that corresponds to the year 1850 conditions and a 10-member ensemble of historical and future transient climate simulations.The CESM-HR configuration is based on an earlier CESM version, CESM1.3, with many additional modifications and improvements. CESM-HR uses a 0.25 degree grid in the atmosphere and land components and a 0.1 degree grid in the ocean and sea-ice components. The primary reason for using an older model version, instead of the latest CESM2, is that CESM2 does not support a high-resolution version per the decision by the CESM Scientific Steering Committee. The component models within CESM1.3 are the Community Atmosphere Model version 5 (CAM5; Neale et al., 2012), the Parallel Ocean Program version 2 (POP2; Danabasoglu et al., 2012; Smith et al., 2010), the Community Ice Code version 4 (CICE4; Hunke & Lipscomb, 2008), and the Community Land Model version 4 (CLM4; Lawrence et al., 2011).Here we release the nominal 1 degree low-resolution (LR) equivalent simulations based on the same CESM1.3 code base and using the same CAM5 Spectral Element (SE) dycore used in CESM-HR to permit an as-clean-as-possible comparison of the respective LR and HR simulations. CESM LR uses a nominal 1 degree grid in all its components. Citation: The two papers linked below are the most appropriate references for these simulations. To cite the dataset, use Chang et al. (2025). We ask that you also cite the dataset itself using the reference Castruccio et al. [https://rda.ucar.edu/datasets/d651030/citation/] (2024) in any documents or publications using these data. Chang et al. (2020) describes the initial CESM-HR simulations, including the 500-year pre-industrial control simulation and the first 250-year historical and future climate simulation from 1850 to 2100. It also introduces the corresponding CESM LR experiments. We would also appreciate receiving a copy of the relevant publications. This will help us to justify keeping the data freely available online in the future. Thank you!
过去六年间，由德克萨斯农工大学（Texas A&M University, TAMU）与美国国家科学基金会国家大气研究中心（U.S. National Science Foundation National Center for Atmospheric Research, NSF NCAR）科研人员组成的研究团队，在高分辨率全球气候模拟与预测领域取得了重大突破。作为美国国家科学基金会资助项目「理解中尺度海气相互作用在季-年代际气候预测中的作用（Understanding the Role of MESoscale Atmosphere-Ocean Interactions in Seasonal-to-Decadal CLImate Prediction, MESACLIP）」的一部分，我们已完成了数千个模拟年的、分辨率适配热带气旋（tropical cyclone, TC）与富含海洋涡旋场景的气候模拟，该配置简称为CESM-HR。其中，我们完成了以1850年气候状态作为永久强迫场的500年工业革命前控制（preindustrial control, PI-CTRL）模拟，以及包含10个成员的历史-未来瞬变气候集合模拟。 CESM-HR配置基于早期的CESM1.3版本，并进行了大量额外修改与优化。该模式的大气与陆面模块采用0.25°网格，海洋与海冰模块则采用0.1°网格。相较于最新的CESM2版本，我们选择使用旧版模型的核心原因在于，CESM科学指导委员会（CESM Scientific Steering Committee）已决议CESM2不再支持高分辨率配置。CESM1.3包含的组分模式包括：第5版社区大气模式（Community Atmosphere Model version 5, CAM5; Neale等, 2012）、第2版并行海洋程序（Parallel Ocean Program version 2, POP2; Danabasoglu等, 2012; Smith等, 2010）、第4版社区海冰代码（Community Ice Code version 4, CICE4; Hunke & Lipscomb, 2008）以及第4版社区陆面模式（Community Land Model version 4, CLM4; Lawrence等, 2011）。 本次我们发布了基于相同CESM1.3代码库、并采用与CESM-HR一致的CAM5谱元（Spectral Element, SE）动力核心的标称1°低分辨率（low-resolution, LR）等效模拟数据集，以实现LR与高分辨率（HR）模拟之间尽可能无干扰的对比。CESM LR的所有模块均采用标称1°网格。 引用说明：以下两篇文献为该模拟数据集的最适宜引用来源。若需引用本数据集，请使用Chang等（2025）的成果；同时请在使用本数据的文档或出版物中，一并引用Castruccio等[https://rda.ucar.edu/datasets/d651030/citation/]（2024）发布的数据集本身。Chang等（2020）阐述了初始CESM-HR模拟工作，包含500年工业革命前控制模拟，以及1850年至2100年间的首套250年历史-未来气候模拟，同时还介绍了对应的CESM LR试验。若您能将相关研究成果的副本提供给我们，将有助于我们持续论证该数据集在线免费开放的合理性。感谢您的支持！
