气候变化领域集成服务门户(CCPortal): The influence of ENSO events on the stratospheric QBO in a multi-model ensemble

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DOI	10.1007/s00382-020-05131-7
	The influence of ENSO events on the stratospheric QBO in a multi-model ensemble
	Serva F.; Cagnazzo C.; Christiansen B.; Yang S.
发表日期	2020
ISSN	0930-7575
起始页码	2561
结束页码	2575
卷号	54
英文摘要	The Quasi-Biennial Oscillation (QBO) and the El Niño–Southern Oscillation (ENSO) are two dominant modes of climate variability at the Equator. There exist observational evidences of mutual interactions between these two phenomena, but this possibility has not been widely studied using climate model simulations. In this work we assess how current models represent the ENSO/QBO relationship, in terms of the response of the amplitude and descent rate of stratospheric wind regimes, by analyzing atmosphere-only and ocean–atmosphere coupled simulations from a large multi-model ensemble. The annual cycle of the QBO descent rate is well represented in both coupled and uncoupled models. Previous results regarding the phase alignment of the QBO after the 1997/98 strong warm ENSO event are confirmed in a larger ensemble of uncoupled experiments. However, in general we find that a relatively high horizontal resolution is necessary to reproduce the observed modulation of the QBO descent rate under strong ENSO events, while the amplitude response is generally weak at any horizontal resolution. We argue that biases in the mean state and over-dependence on parameterized wave forcing undermine the realism of the simulated coupling between the ocean and the stratosphere in the tropics in current climate models. The modulation of the QBO by the ENSO in a high emission scenario consistently differs from that in the historical period, suggesting that this relationship is sensitive to changes in the large-scale circulation. © 2020, The Author(s).
英文关键词	Climate modeling; ENSO; QBO; Stratosphere–troposphere coupling
语种	英语
scopus关键词	atmosphere-ocean coupling; climate modeling; El Nino-Southern Oscillation; ensemble forecasting; quasi-biennial oscillation; stratosphere-troposphere interaction; wave force
来源期刊	Climate Dynamics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/145584
作者单位	Institute of Marine Sciences, National Research Council (ISMAR-CNR), Via Fosso del Cavaliere 100, Rome, 00133, Italy; Danish Meteorological Institute (DMI), Copenhagen, Denmark
推荐引用方式 GB/T 7714	Serva F.,Cagnazzo C.,Christiansen B.,et al. The influence of ENSO events on the stratospheric QBO in a multi-model ensemble[J],2020,54.
APA	Serva F.,Cagnazzo C.,Christiansen B.,&Yang S..(2020).The influence of ENSO events on the stratospheric QBO in a multi-model ensemble.Climate Dynamics,54.
MLA	Serva F.,et al."The influence of ENSO events on the stratospheric QBO in a multi-model ensemble".Climate Dynamics 54(2020).