NCAR CESM2 model output prepared for CMIP6 RFMIP

Coupled Model Intercomparison Project Phase 6 (CMIP6) datasets: These data include all datasets published for 'CMIP6.RFMIP.NCAR.CESM2' with the full Data Reference Syntax following the template 'mip_era.activity_id.institution_id.source_id.experiment_id.member_id.table_id.variable_id.grid_label.version'.

The CESM2 climate model, released in 2018, includes the following components:
aerosol: MAM4 (same grid as atmos), atmos: CAM6 (0.9x1.25 finite volume grid; 288 x 192 longitude/latitude; 32 levels; top level 2.25 mb), atmosChem: MAM4 (same grid as atmos), land: CLM5 (same grid as atmos), landIce: CISM2.1, ocean: POP2 (320x384 longitude/latitude; 60 levels; top grid cell 0-10 m), ocnBgchem: MARBL (same grid as ocean), seaIce: CICE5.1 (same grid as ocean).
The model was run by the National Center for Atmospheric Research, Climate and Global Dynamics Laboratory, 1850 Table Mesa Drive, Boulder, CO 80305, USA (NCAR) in native nominal resolutions: aerosol: 100 km, atmos: 100 km, atmosChem: 100 km, land: 100 km, landIce: 5 km, ocean: 100 km, ocnBgchem: 100 km, seaIce: 100 km.

Project: These data have been generated as part of the internationally-coordinated Coupled Model Intercomparison Project Phase 6 (CMIP6; see also GMD Special Issue: http://www.geosci-model-dev.net/special_issue590.html). The simulation data provides a basis for climate research designed to answer fundamental science questions and serves as resource for authors of the Sixth Assessment Report of the Intergovernmental Panel on Climate Change (IPCC-AR6).

CMIP6 is a project coordinated by the Working Group on Coupled Modelling (WGCM) as part of the World Climate Research Programme (WCRP). Phase 6 builds on previous phases executed under the leadership of the Program for Climate Model Diagnosis and Intercomparison (PCMDI) and relies on the Earth System Grid Federation (ESGF) and the Centre for Environmental Data Analysis (CEDA) along with numerous related activities for implementation. The original data is hosted and partially replicated on a federated collection of data nodes, and most of the data relied on by the IPCC is being archived for long-term preservation at the IPCC Data Distribution Centre (IPCC DDC) hosted by the German Climate Computing Center (DKRZ).

The project includes simulations from about 120 global climate models and around 45 institutions and organizations worldwide. - Project website: https://pcmdi.llnl.gov/CMIP6.

耦合模式比较计划第六阶段（Coupled Model Intercomparison Project Phase 6，CMIP6）数据集：本数据集涵盖所有以`CMIP6.RFMIP.NCAR.CESM2`为标识发布的数据集，其完整数据参考语法遵循模板`mip_era.activity_id.institution_id.source_id.experiment_id.member_id.table_id.variable_id.grid_label.version`。

2018年发布的CESM2气候模式包含以下组成部分：
气溶胶模块：MAM4（与大气模块网格一致）；大气模块：CAM6（0.9×1.25有限体积网格；288×192经纬度网格；共32层，顶层气压为2.25毫巴）；大气化学模块：MAM4（与大气模块网格一致）；陆面模块：CLM5（与大气模块网格一致）；陆冰模块：CISM2.1；海洋模块：POP2（320×384经纬度网格；共60层，顶层网格单元深度为0~10米）；海洋生物地球化学模块：MARBL（与海洋模块网格一致）；海冰模块：CICE5.1（与海洋模块网格一致）。

该模式由美国国家大气研究中心（National Center for Atmospheric Research，NCAR）气候与全球动力学实验室（地址：美国科罗拉多州博尔德市Table Mesa大道1850号，邮编80305）以固有标称分辨率运行，各模块分辨率如下：气溶胶模块：100千米，大气模块：100千米，大气化学模块：100千米，陆面模块：100千米，陆冰模块：5千米，海洋模块：100千米，海洋生物地球化学模块：100千米，海冰模块：100千米。

本项目相关数据集作为国际协调推进的耦合模式比较计划第六阶段（CMIP6；详见《Geoscientific Model Development》特刊：http://www.geosci-model-dev.net/special_issue590.html）的一部分生成。该模拟试验数据为解答核心科学问题的气候研究提供了基础支撑，同时可作为政府间气候变化专门委员会第六次评估报告（IPCC-AR6）作者的参考资源。

CMIP6项目由耦合模式工作组（Working Group on Coupled Modelling，WGCM）协调，隶属于世界气候研究计划（World Climate Research Programme，WCRP）。第六阶段依托此前在气候模式诊断与比较计划（Program for Climate Model Diagnosis and Intercomparison，PCMDI）主导下完成的前期阶段成果，其实施依赖地球系统网格联合会（Earth System Grid Federation，ESGF）、环境数据分析中心（Centre for Environmental Data Analysis，CEDA）以及众多相关配套活动。原始数据托管于联邦化的数据节点集群并进行部分复制，IPCC所依赖的多数数据正由德国气候计算中心（German Climate Computing Center，DKRZ）托管的IPCC数据分发中心（IPCC Data Distribution Centre，IPCC DDC）进行长期保存归档。

该项目涵盖全球约120个全球气候模式的模拟试验以及来自全球约45个科研机构与组织的贡献。——项目官网：https://pcmdi.llnl.gov/CMIP6。