NCAR CESM2-WACCM model output prepared for CMIP6 ScenarioMIP ssp245

Coupled Model Intercomparison Project Phase 6 (CMIP6) datasets: These data include all datasets published for 'CMIP6.ScenarioMIP.NCAR.CESM2-WACCM.ssp245' 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-WACCM climate model, released in 2018, includes the following components:
aerosol: MAM4 (same grid as atmos), atmos: WACCM6 (0.9x1.25 finite volume grid; 288 x 192 longitude/latitude; 70 levels; top level 4.5e-06 mb), atmosChem: MAM4 (same grid as atmos), land: CLM5 (same grid as atmos), landIce: CISM2.1, ocean: POP2 (320 x 384 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：本数据集包含所有针对`CMIP6.ScenarioMIP.NCAR.CESM2-WACCM.ssp245`发布的数据集，且遵循完整的数据参考语法（Data Reference Syntax）模板：`mip_era.activity_id.institution_id.source_id.experiment_id.member_id.table_id.variable_id.grid_label.version`。

CESM2-WACCM气候模式于2018年发布，其包含以下组分：气溶胶模块（aerosol）：MAM4（与大气模块网格一致）；大气模块（atmos）：WACCM6（0.9×1.25有限体积网格；288×192经纬度格点；70层；顶层气压4.5×10^-6 mb）；大气化学模块（atmosChem）：MAM4（与大气模块网格一致）；陆面模块（land）：CLM5（与大气模块网格一致）；陆冰模块（landIce）：CISM2.1；海洋模块（ocean）：POP2（320×384经纬度格点；60层；顶层网格单元深度范围0~10 m）；海洋生物地球化学模块（ocnBgchem）：MARBL（与海洋模块网格一致）；海冰模块（seaIce）：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运行，地址为美国科罗拉多州博尔德市Table Mesa大道1850号，邮编80305，采用原生名义分辨率：气溶胶模块：100 km，大气模块：100 km，大气化学模块：100 km，陆面模块：100 km，陆冰模块：5 km，海洋模块：100 km，海洋生物地球化学模块：100 km，海冰模块：100 km。

本数据集作为国际协调的耦合模式比较计划第六阶段（CMIP6；详见《Geoscientific Model Development》专刊：http://www.geosci-model-dev.net/special_issue590.html）的产出成果，其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）作者群体的参考资源。

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。第六阶段延续了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工作，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），并联动多项相关活动完成项目实施。原始数据托管于联邦化的数据节点集群并实现部分副本存储，IPCC所依赖的多数数据集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）进行长期保存。

本项目汇集了全球约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。

搜集汇总

背景与挑战

背景概述

该数据集是CMIP6 ScenarioMIP项目中NCAR使用CESM2-WACCM气候模型模拟的中等排放情景（ssp245）输出数据，包含大气、海洋、海冰等多个组件，空间分辨率约100公里。数据主要用于全球气候变化研究，为IPCC第六次评估报告提供支持，遵循CC BY 4.0许可并通过ESGF平台公开共享。