气候变化领域集成服务门户(CCPortal): The double-peaked el niño and its physical processes

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DOI	10.1175/JCLI-D-20-0402.1
	The double-peaked el niño and its physical processes
	Shin N.-Y.; Kug J.-S.; McCormack F.S.; Holbrook N.J.
发表日期	2021
ISSN	08948755
起始页码	1291
结束页码	1303
卷号	34 期号:4
英文摘要	Recently, El Niño diversity has been paid much attention because of its different global impacts. However, most studies have focused on a single warm peak in sea surface temperature anomalies (SSTAs), either in the central Pacific or the eastern Pacific Ocean. Here, we demonstrate from observational analyses that several recent El Niño events show double warm peaks in SSTA—called ‘‘double-peaked (DP) El Niño’’—that have only been observed since 2000. The DP El Niño has two warm centers, which grow concurrently but separately, in both the central and eastern Pacific. In general, the atmospheric and oceanic patterns of the DP El Niño are similar to those of the warm-pool (WP) El Niño from the development phase, such that the central Pacific peak is developed by the zonal advective feedback and reduced wind speed anomalies. However, a distinctive difference exists in the eastern Pacific where the DP El Niño has a second SSTA peak. In addition, the DP El Niño shows more distinctive anomalous precipitation along the Pacific intertropical convergence zone (ITCZ) when compared with the WP El Niño. We demonstrate that the peculiar precipitation anomalies along the Pacific ITCZ play a critical role in enhancing the equatorial westerly wind stress anomalies, which help to develop the eastern SSTA peak by deepening the thermocline in the eastern Pacific. Ó 2021 American Meteorological Society. For information regarding reuse of this content and general copyright information, consult the AMS Copyright Policy
英文关键词	Air–sea interaction, Heat budgets/fluxes; El Niño; S: Ocean dynamics
语种	英语
scopus关键词	Oceanography; Surface waters; Wind; American meteorological societies; Copyright informations; Development phase; Eastern pacific Ocean; Intertropical convergence zone; Observational analysis; Precipitation anomalies; Sea surface temperature anomalies; Nickel compounds; air-sea interaction; El Nino; heat budget; heat flux; intertropical convergence zone; precipitation (climatology); sea surface temperature; temperature anomaly; thermocline; warming; wind velocity; Pacific Ocean; Pacific Ocean (Central); Pacific Ocean (East)
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/178631
作者单位	Division of Environmental Science and Engineering, Pohang University of Science and Technology, Pohang, South Korea; School of Earth, Atmosphere and Environment, Monash University, Clayton, VIC, Australia; Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, TAS, Australia; ARC Centre of Excellence for Climate Extremes, University of Tasmania, Hobart, TAS, Australia
推荐引用方式 GB/T 7714	Shin N.-Y.,Kug J.-S.,McCormack F.S.,et al. The double-peaked el niño and its physical processes[J],2021,34(4).
APA	Shin N.-Y.,Kug J.-S.,McCormack F.S.,&Holbrook N.J..(2021).The double-peaked el niño and its physical processes.Journal of Climate,34(4).
MLA	Shin N.-Y.,et al."The double-peaked el niño and its physical processes".Journal of Climate 34.4(2021).