气候变化领域集成服务门户(CCPortal): MJO teleconnections over the PNA region in climate models. Part I: Performance- And process-based skill metrics

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DOI	10.1175/JCLI-D-19-0253.1
	MJO teleconnections over the PNA region in climate models. Part I: Performance- And process-based skill metrics
	Wang J.; Kim H.; Kim D.; Henderson S.A.; Stan C.; Maloney E.D.
发表日期	2020
ISSN	0894-8755
起始页码	1051
结束页码	1067
卷号	33 期号:3
英文摘要	We propose a set of MJO teleconnection diagnostics that enables an objective evaluation of model simulations, a fair model-to-model comparison, and a consistent tracking of model improvement. Various skill metrics are derived from teleconnection diagnostics including five performance-based metrics that characterize the pattern, amplitude, east-west position, persistence, and consistency of MJO teleconnections and additional two process-oriented metrics that are designed to characterize the location and intensity of the anomalous Rossby wave source (RWS). The proposed teleconnection skill metrics are used to compare the characteristics of boreal winter MJO teleconnections (500-hPa geopotential height anomaly) over the Pacific-North America (PNA) region in 29 global climate models (GCMs). The results show that current GCMs generally produce MJO teleconnections that are stronger, more persistent, and extend too far to the east when compared to those observed in reanalysis. In general, models simulate more realistic teleconnection patterns when the MJO is in phases 2-3 or phases 7-8, which are characterized by a dipole convection pattern over the Indian Ocean and western to central Pacific. The higher model skill for phases 2, 7, and 8 may be due to these phases producing more consistent teleconnection patterns between individual MJO events than other phases, although the consistency is lower in most models than observed. Models that simulate realistic RWS patterns better reproduce MJO teleconnection patterns. © 2020 American Meteorological Society. For information regarding reuse of this content and general copyright information, consult the AMS Copyright Policy (www.ametsoc.org/PUBSReuseLicenses).
英文关键词	Climatology; Mechanical waves; Convection patterns; Geopotential height anomalies; Global climate model; Model-to-model comparison; Objective evaluation; Pacific-north america; Performance based; Teleconnection patterns; Climate models; air-sea interaction; climate modeling; geopotential; global climate; Madden-Julian oscillation; Rossby wave; teleconnection; Indian Ocean; North America; Pacific Ocean; Pacific Ocean (Central)
语种	英语
来源期刊	Journal of Climate
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/171466
作者单位	School of Marine and Atmospheric Sciences, Stony Brook University, State University of New York, Stony Brook, NY, United States; Department of Atmospheric Sciences, University of Washington, Seattle, WA, United States; Department of Atmospheric and Oceanic Sciences, University of Wisconsin-Madison, Madison, WI, United States; Department of Atmospheric, Oceanic, and Earth Sciences, George Mason University, Fairfax, VA, United States; Department of Atmospheric Science, Colorado State University, Fort Collins, CO, United States
推荐引用方式 GB/T 7714	Wang J.,Kim H.,Kim D.,et al. MJO teleconnections over the PNA region in climate models. Part I: Performance- And process-based skill metrics[J],2020,33(3).
APA	Wang J.,Kim H.,Kim D.,Henderson S.A.,Stan C.,&Maloney E.D..(2020).MJO teleconnections over the PNA region in climate models. Part I: Performance- And process-based skill metrics.Journal of Climate,33(3).
MLA	Wang J.,et al."MJO teleconnections over the PNA region in climate models. Part I: Performance- And process-based skill metrics".Journal of Climate 33.3(2020).