DOI: 10.1175/JCLI-D-18-0446.1
Scopus记录号: 2-s2.0-85060514862
论文题名: Footprints of Atlantic multidecadal oscillation in the low-frequency variation of extreme high temperature in the Northern Hemisphere
作者: Gao M. ; Yang J. ; Gong D. ; Shi P. ; Han Z. ; Kim S.-J.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2019
卷: 32, 期: 3 起始页码: 791
结束页码: 802
语种: 英语
英文关键词: Atmosphere
; Climate variability
; Decadal variability
; Extreme events
; Oscillations
Scopus关键词: Climate models
; Climatology
; Earth atmosphere
; Atlantic multidecadal oscillations
; Climate variability
; Decadal variability
; Extreme events
; Low-frequency variations
; Multidecadal variations
; Oscillations
; Temperature variation
; Probability density function
英文摘要: The frequency and intensity of extreme high temperature (EHT) in the Northern Hemisphere exhibit remarkable low-frequency (LF) variations (longer than 10 years) in summer during 1951-2017. Five hotspots featuring large LF variations in EHT were identified, including western North America-Mexico, eastern Siberia, Europe, central Asia, and the Mongolian Plateau. The probability density functions show that the higher EHT occurrences over these hotspots in recent decades is consistent with the shifted average and increased variances in daily mean temperature. The common features of the LF variation in EHT frequency over all domains are the remarkable increasing trends and evident decadal to multidecadal variations. The component of decadal to multidecadal variations is the main contribution to the LF variations of temperature in the last century. Further analysis shows that the coherent variability of decadal to multidecadal temperature variations over western North America-Mexico, eastern Siberia, Europe, and the Mongolian Plateau are the footprints of a dominant natural internal signal: the Atlantic multidecadal oscillation. It contributes to the variations in temperature over these hotspots via barotropic circumglobal teleconnection, which imposes striking anomalous pressure over these regions. This study implies that natural internal variability plays an important role in making hotspots more vulnerable to EHT. © 2019 American Meteorological Society.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/117238
Appears in Collections: 气候变化与战略
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Recommended Citation:
Gao M.,Yang J.,Gong D.,et al. Footprints of Atlantic multidecadal oscillation in the low-frequency variation of extreme high temperature in the Northern Hemisphere[J]. Journal of Climate,2019-01-01,32(3)