气候变化领域集成服务门户(CCPortal): Large-scale controls of propagation of the Madden-Julian Oscillation

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DOI	10.1038/s41612-020-00134-x
	Large-scale controls of propagation of the Madden-Julian Oscillation
	Jiang X.; Maloney E.; Su H.
发表日期	2020
ISSN	23973722
卷号	3 期号:1
英文摘要	With widespread influence on global climate and weather extremes, the Madden-Julian Oscillation (MJO) plays a crucial role in subseasonal prediction. Our latest global climate models (GCMs), however, have great difficulty in realistically simulating the MJO. This model inability is largely due to problems in representation of MJO’s cumulus organization. This study, based on a series of idealized aqua-planet model experiments using an atmospheric-only GCM, clearly demonstrates that MJO propagation is strongly modulated by the large-scale background state in which the lower-tropospheric mean moisture gradient and zonal winds are critical. Therefore, when tuning climate models to achieve improved MJO simulations, particular attention needs to be placed on the model large-scale mean state that is also significantly affected by cumulus parameterizations. This study indicates that model biases in representing MJO propagation may be related to the widely reported double-ITCZ (intertropical convergence zone) problem in climate models. © 2020, The Author(s).
语种	英语
scopus关键词	atmospheric moisture; climate modeling; cumulus; extreme event; global climate; Madden-Julian oscillation; troposphere; weather; zonal wind
来源期刊	npj Climate and Atmospheric Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/178037
作者单位	Joint Institute for Regional Earth System Science and Engineering, University of California, Los Angeles, CA, United States; Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, United States; Department of Atmospheric Science, Colorado State University, Fort Collins, CO, United States
推荐引用方式 GB/T 7714	Jiang X.,Maloney E.,Su H.. Large-scale controls of propagation of the Madden-Julian Oscillation[J],2020,3(1).
APA	Jiang X.,Maloney E.,&Su H..(2020).Large-scale controls of propagation of the Madden-Julian Oscillation.npj Climate and Atmospheric Science,3(1).
MLA	Jiang X.,et al."Large-scale controls of propagation of the Madden-Julian Oscillation".npj Climate and Atmospheric Science 3.1(2020).