气候变化领域集成服务门户(CCPortal): Model biases in the simulation of the springtime north pacific ENSO teleconnection

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DOI	10.1175/JCLI-D-19-1004.1
	Model biases in the simulation of the springtime north pacific ENSO teleconnection
	Chen R.; Simpson I.R.; Deser C.; Wang A.B.I.N.
发表日期	2020
ISSN	0894-8755
起始页码	9985
结束页码	10002
卷号	33 期号:23
英文摘要	The wintertime ENSO teleconnection over the North Pacific region consists of an intensified (weakened) low pressure center during El Niño (La Niña) events both in observations and in climate models. Here, it is demonstrated that this teleconnection persists too strongly into late winter and spring in the Community Earth System Model (CESM). This discrepancy arises in both fully coupled and atmosphere-only configurations, when observed SSTs are specified, and is shown to be robust when accounting for the sampling uncertainty due to internal variability. Furthermore, a similar problem is found in many other models from piControl simulations of the Coupled Model Intercomparison Project (23 out of 43 in phase 5 and 11 out of 20 in phase 6). The implications of this bias for the simulation of surface climate anomalies over North America are assessed. The overall effect on the ENSO composite field (El Niño minus La Niña) resembles an overly prolonged influence of ENSO into the spring with anomalously high temperatures over Alaska and western Canada, and wet (dry) biases over California (southwest Canada). Further studies are still needed to disentangle the relative roles played by diabatic heating, background flow, and other possible contributions in determining the overly strong springtime ENSO teleconnection intensity over the North Pacific. © 2020 American Meteorological Society.
英文关键词	Climatology; Oceanography; Composite fields; Coupled Model Intercomparison Project; Diabatic heating; Earth system model; High temperature; Influence of ENSO; Internal variability; Sampling uncertainties; Climate models; climate modeling; computer simulation; El Nino-Southern Oscillation; error analysis; spring (season); standing wave; teleconnection; Pacific Ocean; Pacific Ocean (North)
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/171003
作者单位	Ministry of Education Key Laboratory for Earth System Modeling, Department of Earth System Science, Tsinghua University, Beijing, China; National Center for Atmospheric Research, Boulder, CO, United States; State Key Laboratory of Numerical Modeling for Atmospheric Sciences annind Geophysical Fluid Dynamics (LASG), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; College of Ocean Science, University of Chinese Academy of Sciences, Beijing, China
推荐引用方式 GB/T 7714	Chen R.,Simpson I.R.,Deser C.,et al. Model biases in the simulation of the springtime north pacific ENSO teleconnection[J],2020,33(23).
APA	Chen R.,Simpson I.R.,Deser C.,&Wang A.B.I.N..(2020).Model biases in the simulation of the springtime north pacific ENSO teleconnection.Journal of Climate,33(23).
MLA	Chen R.,et al."Model biases in the simulation of the springtime north pacific ENSO teleconnection".Journal of Climate 33.23(2020).