气候变化领域集成服务门户(CCPortal): On the low-frequency variability of wintertime Euro-Atlantic planetary wave-breaking

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DOI	10.1007/s00382-018-4373-2
	On the low-frequency variability of wintertime Euro-Atlantic planetary wave-breaking
	Messori G.; Davini P.; Alvarez-Castro M.C.; Pausata F.S.R.; Yiou P.; Caballero R.
发表日期	2019
ISSN	0930-7575
起始页码	2431
结束页码	2450
卷号	52 期号:2020-03-04
英文摘要	Planetary wave-breaking can lead to large-scale atmospheric circulation anomalies and favour high-impact weather occurrences. For example, the simultaneous occurrence of anti-cyclonic wave-breaking to the south of the North Atlantic jet and cyclonic wave-breaking to the north, here termed double wave-breaking, has been linked to heightened frequencies of explosive cyclones in the Atlantic basin and destructive windstorms over Western and Continental Europe. The present study analyses the long-term temporal variability of wintertime cyclonic and anti-cyclonic wave-breaking, and the resulting double wave-breaking, in the North Atlantic. We use reanalysis data, proxy reconstructions of the North Atlantic Oscillation (NAO) and a 1000-year coupled global climate model equilibrium simulation under constant pre-industrial forcing. The wave-breaking wavelet spectra highlight a significant ultra-centennial variability in double wave-breaking frequency, which is largely mirrored in the variability of the NAO. However, we note that the NAO wavelet spectra in the different datasets display significant discrepancies. The low-frequency wave-breaking variability is reflected in long-term anomalies of the large-scale atmospheric circulation in the Euro-Atlantic sector. The 100-year periods with the most and least double wave-breaking occurrences display significant and opposite anomalies in both upper and lower-level wind, as well as in the frequency of extreme temperature events and in the magnitude of wind destructiveness over Europe. The latter broadly resembles the wind destructiveness anomalies associated with individual double wave-breaking instances in reanalysis data. The existence of low-frequency variability in an atmospheric pattern related to high-impact weather events has important implications for the study and interpretation of climate change projections and of possible future NAO changes. © 2018, The Author(s).
英文关键词	Low-frequency variability; Millennium; NAO; North Atlantic; Planetary wave-breaking; Windstorms
语种	英语
scopus关键词	anticyclone; atmospheric circulation; frequency analysis; jet; North Atlantic Oscillation; seasonal variation; spatiotemporal analysis; wave breaking; Atlantic Ocean; Atlantic Ocean (North); Europe
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/146515
作者单位	Department of Meteorology and Bolin Centre for Climate Research, Stockholm University, Stockholm, Sweden; Laboratoire des Sciences du Climat et de l’Environnement, UMR 8212, CEA-CNRS-UVSQ, IPSL, Université Paris Saclay, Gif-sur-Yvette, 91191, France; Laboratoire de Météorologie Dynamique/IPSL, École Normale Supérieure, PSL Research University, CNRS, Paris, France; Istituto di Scienze dell’Atmosfera e del Clima, ISAC-CNR, Torino, Italy; Centro euroMediterraneo sui Cambiamenti Climatici, CMCC Foundation, Bologna, Italy; Département des Sciences de la Terre et de l’Atmosphère, Université du Québec à Montréal, Montreal, Canada
推荐引用方式 GB/T 7714	Messori G.,Davini P.,Alvarez-Castro M.C.,et al. On the low-frequency variability of wintertime Euro-Atlantic planetary wave-breaking[J],2019,52(2020-03-04).
APA	Messori G.,Davini P.,Alvarez-Castro M.C.,Pausata F.S.R.,Yiou P.,&Caballero R..(2019).On the low-frequency variability of wintertime Euro-Atlantic planetary wave-breaking.Climate Dynamics,52(2020-03-04).
MLA	Messori G.,et al."On the low-frequency variability of wintertime Euro-Atlantic planetary wave-breaking".Climate Dynamics 52.2020-03-04(2019).