气候变化领域集成服务门户(CCPortal): Southern Ocean cloud and shortwave radiation biases in a nudged climate model simulation: does the model ever get it right?

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DOI	10.5194/acp-22-14603-2022
	Southern Ocean cloud and shortwave radiation biases in a nudged climate model simulation: does the model ever get it right?
	Fiddes, Sonya L.; Protat, Alain; Mallet, Marc D.; Alexander, Simon P.; Woodhouse, Matthew T.
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	14603
结束页码	14630
卷号	22 期号:22 页码:28
英文摘要	The Southern Ocean radiative bias continues to impact climate and weather models, including the Australian Community Climate and Earth System Simulator (ACCESS). The radiative bias, characterised by too much shortwave radiation reaching the surface, is attributed to the incorrect simulation of cloud properties, including frequency and phase. To identify cloud regimes important to the Southern Ocean, we use k-means cloud histogram clustering, applied to a satellite product and then fitted to nudged simulations of the latest-generation ACCESS atmosphere model. We identify instances when the model correctly or incorrectly simulates the same cloud type as the satellite product for any point in time or space. We then evaluate the cloud and radiation biases in these instances. We find that when the ACCESS model correctly simulates the cloud type, cloud property and radiation biases of equivalent, or in some cases greater, magnitude remain compared to when cloud types are incorrectly simulated. Furthermore, we find that even when radiative biases appear small on average, cloud property biases, such as liquid or ice water paths or cloud fractions, remain large. Our results suggest that simply getting the right cloud type (or the cloud macrophysics) is not enough to reduce the Southern Ocean radiative bias. Furthermore, in instances where the radiative bias is small, it may be so for the wrong reasons. Considerable effort is still required to improve cloud microphysics, with a particular focus on cloud phase.
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:000886179500001
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/273142
作者单位	University of Tasmania; Commonwealth Scientific & Industrial Research Organisation (CSIRO); Bureau of Meteorology - Australia; Australian Antarctic Division
推荐引用方式 GB/T 7714	Fiddes, Sonya L.,Protat, Alain,Mallet, Marc D.,et al. Southern Ocean cloud and shortwave radiation biases in a nudged climate model simulation: does the model ever get it right?[J],2022,22(22):28.
APA	Fiddes, Sonya L.,Protat, Alain,Mallet, Marc D.,Alexander, Simon P.,&Woodhouse, Matthew T..(2022).Southern Ocean cloud and shortwave radiation biases in a nudged climate model simulation: does the model ever get it right?.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(22),28.
MLA	Fiddes, Sonya L.,et al."Southern Ocean cloud and shortwave radiation biases in a nudged climate model simulation: does the model ever get it right?".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.22(2022):28.