The CCSM3 Deep Time Climate and Dust Cycle Simulations Isabel2_highmtncami2_4xco2_circ_res and Derivatives

I. Top Level Description This dataset archives simulations with Community Climate System Model version 3 (CCSM3), including a climate model simulation of an interglacial interval during the Late Paleozoic Ice Age in which the altitude of the Central Pangaean Mountains has been raised to ~5000 m altitude to enable widespread tropical glaciation, cold, and aridity. But pCO2 was raised from 140 ppmv to 560 ppmv and the orbit was adjusted to a circular orbit to allow deglaciation at high latitudes. Dust source apportionment experiments based on this simulation also are archived. The baseline climate simulation Isabel2_highmtncami2_4xco2_circ_res was run on the cheyenne machine operated by the Computational Information Systems Laboratory (CISL) of the National Center for Atmospheric Research (NCAR) between 20 August 2018 and 8 September 2018. The dust apportionment experiments were run on cheyenne on 30 July 2019. The baseline climate simulation is a hybrid of Isabel1 archived as DOI: 10.17632/fv54b3gp2w.1. More complete documentation is included in the top-level README.TXT References: Rosenbloom, N., C. Shields, E. Brady, S. Levis, and S. Yeager, 2011, Using CCSM3 for Paleoclimate Applications, National Center for Atmospheric Research (Boulder, CO) Technical Note, NCAR/TN-483+STR. Acknowledgments: These simulations made use of CISL-NCAR resources. Their execution and archiving were supported by the National Science Foundation under EAR-1337363.一、顶层描述 本数据集归档了基于通用气候系统模型第3版（Community Climate System Model version 3, CCSM3）的模拟实验数据，包含晚古生代冰期一间冰期时段的气候模拟实验：该实验将泛中央山脉的海拔抬升至约5000米，以实现广泛的热带冰川作用、低温与干旱环境；同时将大气二氧化碳分压（pCO₂）从140ppmv提升至560ppmv，并将轨道调整为圆形轨道，以促成高纬度地区的冰消作用。基于该模拟实验的粉尘源解析实验数据也已归档。 基准气候模拟实验Isabel2_highmtncami2_4xco2_circ_res于2018年8月20日至9月8日期间，在美国国家大气研究中心（National Center for Atmospheric Research, NCAR）计算信息系统实验室（Computational Information Systems Laboratory, CISL）运营的Cheyenne超级计算机上运行；粉尘源解析实验则于2019年7月30日在Cheyenne超级计算机上完成。 该基准气候模拟实验是已归档的Isabel1实验的混合版本，其归档DOI为10.17632/fv54b3gp2w.1。 更完整的文档说明可参见顶层目录下的README.TXT文件。 参考文献： Rosenbloom N., Shields C., Brady E., Levis S. 及 Yeager S., 2011年，《将CCSM3应用于古气候研究》，美国国家大气研究中心（科罗拉多州博尔德）技术报告，NCAR/TN-483+STR。 致谢： 本系列模拟实验使用了NCAR-CISL的计算资源，其运行与归档工作得到了美国国家科学基金会EAR-1337363项目的资助。