DOI: 10.1007/s00382-017-3734-6
Scopus记录号: 2-s2.0-85019562370
论文题名: The Asian–Bering–North American teleconnection: seasonality, maintenance, and climate impact on North America
作者: Yu B. ; Lin H. ; Wu Z.W. ; Merryfield W.J.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2018
卷: 50, 期: 2018-05-06 起始页码: 2023
结束页码: 2038
语种: 英语
Scopus关键词: climate effect
; energy budget
; geopotential
; longwave radiation
; sea surface temperature
; seasonality
; snow cover
; teleconnection
; temperature anomaly
; troposphere
; Bering Sea
; North America
; Pacific Ocean
英文摘要: The Asian–Bering–North American (ABNA) teleconnection index is constructed from the normalized 500-hPa geopotential field by excluding the Pacific–North American pattern contribution. The ABNA pattern features a zonally elongated wavetrain originating from North Asia and flowing downstream across Bering Sea and Strait towards North America. The large-scale teleconnection is a year-round phenomenon that displays strong seasonality with the peak variability in winter. North American surface temperature and temperature extremes, including warm days and nights as well as cold days and nights, are significantly controlled by this teleconnection. The ABNA pattern has an equivalent barotropic structure in the troposphere and is supported by synoptic-scale eddy forcing in the upper troposphere. Its associated sea surface temperature anomalies exhibit a horseshoe-shaped structure in the North Pacific, most prominent in winter, which is driven by atmospheric circulation anomalies. The snow cover anomalies over the West Siberian plain and Central Siberian Plateau in autumn and spring and over southern Siberia in winter may act as a forcing influence on the ABNA pattern. The snow forcing influence in winter and spring can be traced back to the preceding season, which provides a predictability source for this teleconnection and for North American temperature variability. The ABNA associated energy budget is dominated by surface longwave radiation anomalies year-round, with the temperature anomalies supported by anomalous downward longwave radiation and damped by upward longwave radiation at the surface. © 2017, The Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109429
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Climate Research Division, Environment and Climate Change Canada, 4905 Dufferin Street, Toronto, ON M3H 5T4, Canada; Meteorological Research Division, Environment and Climate Change Canada, Dorval, Canada; Institute of Atmospheric Sciences, Fudan University, Shanghai, China; Canadian Centre for Climate Modelling and Analysis, Environment and Climate Change Canada, Canada
Recommended Citation:
Yu B.,Lin H.,Wu Z.W.,et al. The Asian–Bering–North American teleconnection: seasonality, maintenance, and climate impact on North America[J]. Climate Dynamics,2018-01-01,50(2018-05-06)