DOI: 10.1007/s00382-017-4065-3
Scopus记录号: 2-s2.0-85039995517
论文题名: Relationship between the North Pacific Gyre Oscillation and the onset of stratospheric final warming in the northern Hemisphere
作者: Hu J. ; Li T. ; Xu H.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2018
卷: 51, 期: 2018-07-08 起始页码: 3061
结束页码: 3075
语种: 英语
英文关键词: Interannual time scale
; North Pacific Gyre Oscillation
; Spring season
; Stratospheric final warming
; Stratospheric sudden warming
Scopus关键词: air-sea interaction
; annual variation
; extratropical environment
; gyre
; Northern Hemisphere
; spring (season)
; stratosphere
; timescale
; troposphere
; warming
; North America
; Pacific Ocean
; Pacific Ocean (West)
英文摘要: The seasonal timing or onset date of the stratospheric final warming (SFWOD) events has a considerable interannual variability. This paper reports a statistically significant relationship between the North Pacific Gyre Oscillation (NPGO) and SFWOD in the Northern Hemisphere in two sub-periods (1951–1978 and 1979–2015). Specifically, in the first (second) sub-period, the NPGO is negatively (positively) linked with SFWOD. Composite analyses associated with anomalous NPGO years are conducted to diagnose the dynamic processes of the NPGO–SFWOD link. During 1951–1978, positive NPGO years tend to strengthen the Pacific–North America (PNA) pattern in the mid-troposphere in boreal winter. The strengthened PNA pattern in February leads to strong planetary wave activity in the extratropical stratosphere from late February to March and causes the early onset of SFW in early April. By contrast, a strengthened Western Pacific pattern from January to early February in negative NPGO years causes a burst of planetary waves in both the troposphere and extratropical stratosphere from late January to mid-February and results in more winter stratospheric sudden warming events, which, in turn, leads to a dormant spring and a late onset of SFW in late April. During 1979–2015, positive (negative) NPGO years strongly strengthen (weaken) the mid-tropospheric Aleutian low and the Western Pacific pattern from January to mid-March, leading to increased (decreased) planetary wavenumber-1 activity in the stratosphere from mid- to late winter and thus more (less) winter stratospheric sudden warming events and late (early) onsets of SFW in early May (mid-April). © 2018, Springer-Verlag GmbH Germany, part of Springer Nature. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109087
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: Key Laboratory of Meteorological Disaster, Ministry of Education (KLME), Joint International Research Laboratory of Climate and Environmental Change (ILCEC), Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters (CIC-FEMD), Nanjing University of Information Science and Technology, Nanjing, China; International Pacific Research Center, Department of Atmospheric Sciences, University of Hawaii at Manoa, Honolulu, HI 96822, United States
Recommended Citation:
Hu J.,Li T.,Xu H.. Relationship between the North Pacific Gyre Oscillation and the onset of stratospheric final warming in the northern Hemisphere[J]. Climate Dynamics,2018-01-01,51(2018-07-08)