Scopus记录号: 2-s2.0-85052075676
论文题名: On the low-frequency variability of wintertime Euro-Atlantic planetary wave-breaking
作者: Messori G. ; Davini P. ; Alvarez-Castro M.C. ; Pausata F.S.R. ; Yiou P. ; Caballero R.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2019
卷: 52, 期: 2019-03-04 起始页码: 2431
结束页码: 2450
语种: 英语
英文关键词: Low-frequency variability
; Millennium
; NAO
; North Atlantic
; Planetary wave-breaking
; Windstorms
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). 资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/122388
Appears in Collections: 气候变化事实与影响
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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
Recommended Citation:
Messori G.,Davini P.,Alvarez-Castro M.C.,et al. On the low-frequency variability of wintertime Euro-Atlantic planetary wave-breaking[J]. Climate Dynamics,2019-01-01,52(2019-03-04)