DOI: 10.1175/JCLI-D-17-0789.1
Scopus记录号: 2-s2.0-85061013549
论文题名: On the role of the eastern Pacific teleconnection in ENSO impacts on wintertime weather over East Asia and North America
作者: Dai Y. ; Tan B.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2019
卷: 32, 期: 4 起始页码: 1217
结束页码: 1234
语种: 英语
英文关键词: Convection
; ENSO
; Monsoons
; Teleconnections
Scopus关键词: Atmospheric pressure
; Atmospheric temperature
; Heat convection
; Oceanography
; Surface properties
; Surface waters
; Weather information services
; Convection patterns
; ENSO
; Monsoons
; Sea surface temperature anomalies
; Significant surfaces
; Southern oscillation
; Teleconnection patterns
; Teleconnections
; Climatology
英文摘要: Previous studies have mainly focused on the influence of El Niño-Southern Oscillation (ENSO) on seasonal-mean conditions over East Asia and North America. This study, instead, proposes an ENSO pathway that influences the weather events over East Asia and North America, in which the eastern Pacific teleconnection pattern (EP) plays an important role. On the one hand, the EP pattern can induce significant surface temperature anomalies over East Asia during its development and mature stages, with the positive (negative) EPs causing colder (warmer) than normal weather events. Besides, the frequency of occurrence of EPs is significantly modulated by ENSO, with 50% of the positive EPs occurring in La Niña winters, and 47% of the negative EPs occurring in El Niño winters. As a result, in El Niño winters, more negative and fewer positive EPs tend to occur, and thus more warm and fewer cold weather events are expected in East Asia. For La Niña winters, the reverse is true. On the other hand, for the EP pattern without its canonical convection pattern (referred to as the nonconvective EP), extremely cold anomalies over the northern United States and western Canada are induced in its negative phase. Moreover, when there are positive sea surface temperature anomalies in the central equatorial Pacific, the frequency of occurrence of negative nonconvective EPs is 2.0 times greater than the climatological value, and thus an enhanced likelihood of extremely cold spells over North America may be expected. © 2019 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/117204
Appears in Collections: 气候变化与战略
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Recommended Citation:
Dai Y.,Tan B.. On the role of the eastern Pacific teleconnection in ENSO impacts on wintertime weather over East Asia and North America[J]. Journal of Climate,2019-01-01,32(4)