Coupled Aerosol and Climate Models: An Intercomparison of the GFDL Model and the NCAR Model

气溶胶和气候耦合模型：GFDL 模型和 NCAR 模型的比较

• 批准号: 0946739
• 负责人: Joyce Penner
• 金额: $ 60万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-08-01 至 2015-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0946739&HistoricalAwards=false
• 关键词: Coupled; Aerosol; Climate; Models; Intercomparison

This project aims to examine the relationships between aerosol changes, cloud changes and climate change using the Integrated Massively Parallel Atmospheric Chemical Transport (IMPACT) aerosol model coupled to two different climate models and to evaluate the adequacy of the aerosol treatment and cloud treatments within the two versions of the coupled IMPACT/climate models. Specifically, the investigators will (i) couple the aerosol model to the Geophysical Fluid Dynamics Laboratory (GFDL) atmospheric general circulation model (AGCM) and the National Center for Atmospheric Research (NCAR) Community Atmosphere Model (CAM) models that will be used in the Intergovernmental Panel on Climate Change 5th assessment report (AR5) simulations, (ii) compare how different parameterizations in the models as well as basic model dynamics help determine the cloud fields, aerosol fields, and direct and indirect forcing by aerosols, and (iii) study the relative changes to clouds from changes in climate and from aerosols. This project will help to determine which climate model transport, chemical transformation, and removal for aerosols is best able to reproduce satellite data for aerosol optical depth, ratio of extinction as a function of wavelength, backscattering profiles, and the effective radius of aerosols. It may also help to reduce the range of sensitivity of climate models to increases in greenhouse gases. Broader impacts of this project concern both its policy implications and the training of scientific personnel. The issues being addressed are of prime importance in the determination of climate change and its prediction. The use of models that are being submitted to the next IPCC AR5 report will help the understanding and comparison two primary U.S. models used in that policy-relevant report. In addition, a graduate student as well as a post-doctoral will be trained and results from this project are routinely used to update the Precipitation and Clouds course taught by one of the investigators.

该项目旨在利用集成大规模并行大气化学输送（IMPACT）气溶胶模型与两个不同的气候模型相结合，研究气溶胶变化、云变化和气候变化之间的关系，并评估两个版本的 IMPACT/气候耦合模型中气溶胶处理和云处理的充分性。具体来说，研究人员将（i）将气溶胶模型与地球物理流体动力学实验室（GFDL）大气环流模型（AGCM）和国家大气研究中心（NCAR）社区大气模型（CAM）模型结合起来，这些模型将用于政府间气候变化专门委员会第五次评估报告（AR5）模拟，（ii）比较模型中的不同参数化以及基本模型动力学如何帮助 确定云场、气溶胶场以及气溶胶的直接和间接强迫，以及 (iii) 研究气候变化和气溶胶对云的相对变化。 该项目将有助于确定哪种气候模型的气溶胶传输、化学转化和去除最能够再现气溶胶光学深度、消光比与波长、反向散射剖面和气溶胶有效半径的卫星数据。它还可能有助于降低气候模型对温室气体增加的敏感性范围。该项目的更广泛影响涉及其政策影响和科学人员的培训。正在解决的问题对于气候变化的确定及其预测至关重要。使用正在提交给下一份 IPCC AR5 报告的模型将有助于理解和比较该政策相关报告中使用的两个主要美国模型。此外，还将培训一名研究生和一名博士后，该项目的结果通常用于更新其中一名研究人员教授的降水和云课程。