CCCma CanESM5 model output prepared for CMIP6 CFMIP amip-4xCO2

Coupled Model Intercomparison Project Phase 6 (CMIP6) datasets: These data include all datasets published for 'CMIP6.CFMIP.CCCma.CanESM5.amip-4xCO2' 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 CanESM5 climate model, released in 2019, includes the following components:
aerosol: interactive, atmos: CanAM5 (T63L49 native atmosphere, T63 Linear Gaussian Grid; 128 x 64 longitude/latitude; 49 levels; top level 1 hPa), atmosChem: specified oxidants for aerosols, land: CLASS3.6/CTEM1.2, landIce: specified ice sheets, ocean: NEMO3.4.1 (ORCA1 tripolar grid, 1 deg with refinement to 1/3 deg within 20 degrees of the equator; 361 x 290 longitude/latitude; 45 vertical levels; top grid cell 0-6.19 m), ocnBgchem: Canadian Model of Ocean Carbon (CMOC); NPZD ecosystem with OMIP prescribed carbonate chemistry, seaIce: LIM2.
The model was run by the Canadian Centre for Climate Modelling and Analysis, Environment and Climate Change Canada, Victoria, BC V8P 5C2, Canada (CCCma) in native nominal resolutions: aerosol: 500 km, atmos: 500 km, atmosChem: 500 km, land: 500 km, landIce: 500 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：本数据集包含所有针对"CMIP6.CFMIP.CCCma.CanESM5.amip-4xCO2"发布的数据集，其完整数据参考语法遵循"mip_era.activity_id.institution_id.source_id.experiment_id.member_id.table_id.variable_id.grid_label.version"模板格式。

于2019年发布的CanESM5气候模式包含以下组成模块：
- 气溶胶模块：交互式模拟
- 大气模块：CanAM5（T63L49原生大气模式，采用T63线性高斯格网；经纬度格点为128×64；共49层垂直结构，顶层气压为1百帕）
- 大气化学模块：针对气溶胶设定氧化剂参数
- 陆面模块：CLASS3.6/CTEM1.2
- 陆冰模块：指定冰盖参数
- 海洋模块：NEMO3.4.1（ORCA1三极格网，全球基础分辨率为1度，赤道20度范围内加密至1/3度；经纬度格点数为361×290；共45层垂直分层；顶层网格单元水深范围为0~6.19米）
- 海洋生物地球化学模块：加拿大海洋碳模式（Canadian Model of Ocean Carbon，CMOC）；采用NPZD生态系统框架，并依据海洋模式比对计划（Ocean Model Intercomparison Project，OMIP）设定碳酸盐化学参数
- 海冰模块：LIM2

该模式由加拿大环境与气候变化部下属的加拿大气候模拟与分析中心（Canadian Centre for Climate Modelling and Analysis，CCCma）运行，其办公地点位于加拿大不列颠哥伦比亚省维多利亚市（邮编V8P 5C2），各模块采用的名义原生分辨率如下：气溶胶模块500公里、大气模块500公里、大气化学模块500公里、陆面模块500公里、陆冰模块500公里、海洋模块100公里、海洋生物地球化学模块100公里、海冰模块100公里。

项目背景：本数据集作为国际协作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）的产出成果之一。该模拟数据可为解答核心科学问题的气候研究提供支撑，同时亦可作为政府间气候变化专门委员会第六次评估报告（Intergovernmental Panel on Climate Change Sixth Assessment Report，IPCC-AR6）作者团队的参考资料。

CMIP6由耦合模式工作组（Working Group on Coupled Modelling，WGCM）协调开展，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）主导下完成的多轮耦合模式比较计划，其实施依赖地球系统网格联盟（Earth System Grid Federation，ESGF）、环境数据分析中心（Centre for Environmental Data Analysis，CEDA）以及众多相关协作项目。原始数据托管于分布式数据节点联盟并实现部分副本存储，而IPCC第六次评估报告所依赖的绝大多数数据，目前正由德国气候计算中心（German Climate Computing Center，DKRZ）运维的IPCC数据分发中心（IPCC Data Distribution Centre，IPCC DDC）进行长期归档保存。

本项目汇聚了全球约120个全球气候模式以及45家左右的科研机构与组织的模拟成果。项目官方网站：https://pcmdi.llnl.gov/CMIP6。