NOAA-GFDL GFDL-CM4 model output prepared for CMIP6 OMIP

Coupled Model Intercomparison Project Phase 6 (CMIP6) datasets: These data include all datasets published for 'CMIP6.OMIP.NOAA-GFDL.GFDL-CM4' 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 GFDL-CM4 climate model, released in 2018, includes the following components:
aerosol: interactive, atmos: GFDL-AM4.0.1 (Cubed-sphere (c96) - 1 degree nominal horizontal resolution; 360 x 180 longitude/latitude; 33 levels; top level 1 hPa), atmosChem: fast chemistry, aerosol only, land: GFDL-LM4.0.1 (1 degree nominal horizontal resolution; 360 x 180 longitude/latitude; 20 levels; bottom level 10m); land-Veg:unnamed (dynamic vegetation, dynamic land use); land-Hydro:unnamed (soil water and ice, multi-layer snow, rivers and lakes), landIce: GFDL-LM4.0.1, ocean: GFDL-OM4p25 (GFDL-MOM6, tripolar - nominal 0.25 deg; 1440 x 1080 longitude/latitude; 75 levels; top grid cell 0-2 m), ocnBgchem: GFDL-BLINGv2, seaIce: GFDL-SIM4p25 (GFDL-SIS2.0, tripolar - nominal 0.25 deg; 1440 x 1080 longitude/latitude; 5 layers; 5 thickness categories).
The model was run by the National Oceanic and Atmospheric Administration, Geophysical Fluid Dynamics Laboratory, Princeton, NJ 08540, USA (NOAA-GFDL) in native nominal resolutions: aerosol: 100 km, atmos: 100 km, atmosChem: 100 km, land: 100 km, landIce: 100 km, ocean: 25 km, ocnBgchem: 25 km, seaIce: 25 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`mip_era.activity_id.institution_id.source_id.experiment_id.member_id.table_id.variable_id.grid_label.version`为完整数据参考语法模板发布的`CMIP6.OMIP.NOAA-GFDL.GFDL-CM4`相关数据集。

GFDL-CM4气候模式于2018年正式发布，其组成模块如下：气溶胶模块（aerosol）：采用交互式方案；大气模块（atmos）：GFDL-AM4.0.1（采用立方球面网格（c96），名义水平分辨率为1度，经纬度网格尺寸为360×180，共33层，顶层气压为1百帕）；大气化学模块（atmosChem）：仅包含气溶胶的快速化学方案；陆面模块（land）：GFDL-LM4.0.1（名义水平分辨率1度，经纬度网格尺寸为360×180，共20层，底层深度为10米）；陆地植被模块（land-Veg）：未命名，支持动态植被与动态土地利用变化；陆地水文模块（land-Hydro）：未命名，涵盖土壤水与冰、多层积雪、河流与湖泊系统；陆冰模块（landIce）：GFDL-LM4.0.1；海洋模块（ocean）：GFDL-OM4p25（基于GFDL-MOM6开发，采用三极网格，名义分辨率0.25度，经纬度网格尺寸为1440×1080，共75层，顶层网格深度范围为0-2米）；海洋生物地球化学模块（ocnBgchem）：GFDL-BLINGv2；海冰模块（seaIce）：GFDL-SIM4p25（基于GFDL-SIS2.0开发，采用三极网格，名义分辨率0.25度，经纬度网格尺寸为1440×1080，共5层，包含5个厚度分类）。

该模式由美国新泽西州普林斯顿市美国国家海洋和大气管理局地球物理流体动力学实验室（National Oceanic and Atmospheric Administration Geophysical Fluid Dynamics Laboratory，NOAA-GFDL）以原始名义分辨率运行，各模块分辨率分别为：气溶胶模块100公里，大气模块100公里，大气化学模块100公里，陆面模块100公里，陆冰模块100公里，海洋模块25公里，海洋生物地球化学模块25公里，海冰模块25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）的产出成果生成。该模拟数据为解答核心科学问题的气候研究提供支撑，同时可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）的撰稿人提供参考资源。

CMIP6由世界气候研究计划（World Climate Research Programme，WCRP）下属的耦合模式工作组（Working Group on Coupled Modelling，WGCM）协调推进。第六阶段继承了此前由气候模式诊断与比较计划（Program for Climate Model Diagnosis and Intercomparison，PCMDI）主导的前序阶段工作，并依托地球系统网格联合会（Earth System Grid Federation，ESGF）与环境数据分析中心（Centre for Environmental Data Analysis，CEDA）及众多相关协作活动完成实施。原始数据存储于分布式数据节点集群并进行部分复制，IPCC所依赖的绝大多数数据将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）进行长期归档保存。

该项目汇集了全球约120个全球气候模式与近45家科研机构及组织的模拟成果。——项目官网：https://pcmdi.llnl.gov/CMIP6.