气候变化领域集成服务门户(CCPortal): Impact of Integrated Vertical Overlap of Cumulus and Stratus on the Global Precipitation and Radiation Processes in the Seoul National University Atmosphere Model Version 0 With a Unified Convection Scheme (SAM0-UNICON)

CCPortal

DOI	10.1029/2018MS001570
	Impact of Integrated Vertical Overlap of Cumulus and Stratus on the Global Precipitation and Radiation Processes in the Seoul National University Atmosphere Model Version 0 With a Unified Convection Scheme (SAM0-UNICON)
	Park S.; Kim S.; Shin J.; Oh E.
发表日期	2019
ISSN	19422466
起始页码	468
结束页码	484
卷号	11 期号:2
英文摘要	The previously proposed parameterization for the integrated vertical overlap of cumulus and stratus is implemented online into the cloud microphysics and radiation schemes of the Seoul National University Atmosphere Model version 0 with a Unified Convection Scheme (SAM0-UNICON). Instead of a single-merged cloud, the modified radiation scheme handles cumulus, stratus, and stratiform snow, separately, with each type having its own optical properties and vertical overlap structures. The integrated cloud overlap parameterization implemented into the cloud microphysics schemes do not reduce the biases of surface precipitation rate (PRECT) and cloud radiative forcing. Although it changes the overlap structures of clouds and precipitation areas, as well as the associated cloud microphysical processes either directly or indirectly, strong cancelation occurs among these terms, resulting in small changes to the global-mean PRECT and cloud radiative forcing. The integrated cloud overlap parameterization implemented into the radiation scheme has a substantial impact on the simulated climate: the global-mean cloud radiative forcing decreases substantially, mainly due to the separate treatment of radiative properties of individual cumulus, stratus, and stratiform snow, and PRECT exhibits strong regional responses. Sensitivity simulations showed that vertical cloud overlap exerts a weaker influence on the global-mean PRECT than the previous off-line simulations, implying that the indirect effect offsets the direct effect. In contrast to the off-line simulations, the enhanced randomness of cumulus overlap increases PRECT over the western Pacific warm pool region. Our study indicates that vertical cloud overlap has substantial impacts on global climate through complex interactions with other physical processes. ©2019. The Authors.
英文关键词	general circulation model; vertical cloud overlap
语种	英语
scopus关键词	Atmospheric radiation; Optical properties; Parameterization; Snow; Cloud microphysical process; Cloud overlap; Cloud radiative forcing; General circulation model; Sensitivity Simulation; Seoul National University; Surface precipitation; Western Pacific Warm Pool; Clouds; atmospheric convection; atmospheric modeling; cloud microphysics; cloud radiative forcing; cumulus; general circulation model; global climate; optical property; precipitation (climatology); stratus; warm pool
来源期刊	Journal of Advances in Modeling Earth Systems
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/156954
作者单位	School of Earth and Environmental Sciences, Seoul National University, Seoul, South Korea
推荐引用方式 GB/T 7714	Park S.,Kim S.,Shin J.,et al. Impact of Integrated Vertical Overlap of Cumulus and Stratus on the Global Precipitation and Radiation Processes in the Seoul National University Atmosphere Model Version 0 With a Unified Convection Scheme (SAM0-UNICON)[J],2019,11(2).
APA	Park S.,Kim S.,Shin J.,&Oh E..(2019).Impact of Integrated Vertical Overlap of Cumulus and Stratus on the Global Precipitation and Radiation Processes in the Seoul National University Atmosphere Model Version 0 With a Unified Convection Scheme (SAM0-UNICON).Journal of Advances in Modeling Earth Systems,11(2).
MLA	Park S.,et al."Impact of Integrated Vertical Overlap of Cumulus and Stratus on the Global Precipitation and Radiation Processes in the Seoul National University Atmosphere Model Version 0 With a Unified Convection Scheme (SAM0-UNICON)".Journal of Advances in Modeling Earth Systems 11.2(2019).