气候变化领域集成服务门户(CCPortal): Changes of South-Central Pacific Large-Scale Environment Associated With Hydrometeors-Radiation-Circulation Interactions in a Coupled GCM

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DOI	10.1029/2021JD034973
	Changes of South-Central Pacific Large-Scale Environment Associated With Hydrometeors-Radiation-Circulation Interactions in a Coupled GCM
	Li J.L.F.; Xu K.-M.; Lee W.-L.; Jiang J.H.; Fetzer E.; Stephens G.; Yu J.-Y.; Wang Y.-H.
发表日期	2021
ISSN	2169-897X
卷号	126 期号:17
英文摘要	A common deficiency in coupled atmosphere-ocean models is the lack of stratocumulus clouds near the west coasts of continents and shallow cumulus clouds over the trade wind regions. In this study, we examine changes of large-scale trade wind environment associated with hydrometeors-radiation-circulation interactions, focusing over the south-central Pacific, by carrying out experiments with falling ice (snow) radiative effects (FIREs) on or off using the CESM1-CAM5 coupled model. Compared to observations/reanalysis data and an experiment with FIREs on (SON), an experiment with FIREs off (NOS) tends to have too-high (0.3–0.9 K) sea surface temperature (SST) over the eastern half of the Pacific, and weaker surface wind stress over the northeast side but stronger stress over the southwest side of the study domain. The difference between NOS and SON shows lower-tropospheric wind fields with a cyclonic-like wind pattern, which is similar to surface wind stress, accompanied with weaker subsidence over the northeast side. The cyclonic-like wind pattern causes stronger moisture convergence, accompanied with horizontal warm and moist advections, and stronger effective ascending motion over the northeast side of the study domain, building large-scale environmental conditions to facilitate middle- and high-clouds instead of shallow cumulus clouds in nature. This large-scale environment in conjunction with the higher SSTs may be also responsible for the lack of the stratocumulus clouds near the coast of America. Remaining biases in SON such as the double intertropical convergence zone and parameterization deficiencies may also prevent a more realistic simulation of trade wind clouds and their associated large-scale environments. © 2021. American Geophysical Union. All Rights Reserved. California Institute of Technology. Government sponsorship acknowledged. This article has been contributed to by US Government employees and their work is in the public domain in the USA.
英文关键词	circulation; cloud fraction; coupled GCM; hydrometeors-radiation interactions; trade-wind regions
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/237047
作者单位	Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States; NASA Langley Research Center, Science Directorate, Hampton, VA, United States; RCEC, Academia Sinica, Taipei City, Taiwan; Department of Atmospheric Sciences, National Central University, Taoyuan City, Taiwan; California Polytechnic State University, San Luis Obispo, CA, United States
推荐引用方式 GB/T 7714	Li J.L.F.,Xu K.-M.,Lee W.-L.,et al. Changes of South-Central Pacific Large-Scale Environment Associated With Hydrometeors-Radiation-Circulation Interactions in a Coupled GCM[J],2021,126(17).
APA	Li J.L.F..,Xu K.-M..,Lee W.-L..,Jiang J.H..,Fetzer E..,...&Wang Y.-H..(2021).Changes of South-Central Pacific Large-Scale Environment Associated With Hydrometeors-Radiation-Circulation Interactions in a Coupled GCM.Journal of Geophysical Research: Atmospheres,126(17).
MLA	Li J.L.F.,et al."Changes of South-Central Pacific Large-Scale Environment Associated With Hydrometeors-Radiation-Circulation Interactions in a Coupled GCM".Journal of Geophysical Research: Atmospheres 126.17(2021).