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DOI	10.5194/acp-22-2095-2022
	How well do the CMIP6 models simulate dust aerosols?
	Zhao, Alcide; Ryder, Claire L.; Wilcox, Laura J.
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	2095
结束页码	2119
卷号	22 期号:3 页码:25
英文摘要	Mineral dust impacts key processes in the Earth system, including the radiation budget, clouds, and nutrient cycles. We evaluate dust aerosols in 16 models participating in the sixth phase of the Coupled Model Intercomparison Project (CMIP6) against multiple reanalyses and observations. We note that both the reanalyses and observations used here have their limitations and particularly that dust emission and deposition in reanalyses are poorly constrained. Most models, and particularly the multi-model ensemble mean (MEM), capture the spatial patterns and seasonal cycles of global dust processes well. However, large uncertainties and inter-model diversity are found. For example, global dust emissions, primarily driven by model-simulated surface winds, vary by a factor of 5 across models, while the MEM estimate is double the amount in reanalyses. The ranges of CMIP6 model-simulated global dust emission, deposition, burden, and optical depth (DOD) are larger than previous generations of models. Models present considerable disagreement in dust seasonal cycles over North China and North America. Here, DOD values are overestimated by most CMIP6 models, with the MEM estimate 1.2-1.7 times larger compared to satellite and reanalysis datasets. Such overestimates can reach up to a factor of 5 in individual models. Models also fail to reproduce some key features of the regional dust distribution, such as dust accumulation along the southern edge of the Himalayas. Overall, there are still large uncertainties in CMIP6 models' simulated dust processes, which feature inconsistent biases throughout the dust life cycle between models, particularly in the relationship connecting dust mass to DOD. Our results imply that modelled dust processes are becoming more uncertain as models become more sophisticated. More detailed output and dust size-resolved variables in particular, relating to the dust cycle in future intercomparison projects, are needed to enable better constraints of global dust cycles and enable the potential identification of observationally constrained links between dust cycles and optical properties.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000759326400001
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/273241
作者单位	University of Reading; UK Research & Innovation (UKRI); Natural Environment Research Council (NERC); NERC National Centre for Atmospheric Science
推荐引用方式 GB/T 7714	Zhao, Alcide,Ryder, Claire L.,Wilcox, Laura J.. How well do the CMIP6 models simulate dust aerosols?[J],2022,22(3):25.
APA	Zhao, Alcide,Ryder, Claire L.,&Wilcox, Laura J..(2022).How well do the CMIP6 models simulate dust aerosols?.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(3),25.
MLA	Zhao, Alcide,et al."How well do the CMIP6 models simulate dust aerosols?".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.3(2022):25.