DOI: 10.1007/s00382-017-3615-z
Scopus记录号: 2-s2.0-85015061174
论文题名: Impacts of winter NPO on subsequent winter ENSO: sensitivity to the definition of NPO index
作者: Chen S. ; Wu R.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2018
卷: 50, 期: 2018-01-02 起始页码: 375
结束页码: 389
语种: 英语
英文关键词: Different definitions
; ENSO
; The North Pacific Oscillation
Scopus关键词: air-sea interaction
; atmosphere-ocean coupling
; climate oscillation
; El Nino-Southern Oscillation
; empirical orthogonal function analysis
; heat flux
; sea surface temperature
; sensitivity analysis
; temperature anomaly
; winter
; Pacific Ocean
; Pacific Ocean (North)
; Pacific Ocean (Tropical)
; Pacific Ocean (West)
英文摘要: This study investigates the linkage between boreal winter North Pacific Oscillation (NPO) and subsequent winter El Niño-Southern Oscillation (ENSO) based on seven different NPO indices. Results show that the influence of winter NPO on the subsequent winter El Niño is sensitive to how the NPO is defined. A significant NPO-El Niño connection is obtained when the NPO-related anomalous cyclone over the subtropical North Pacific extends to near-equatorial regions. The anomalous cyclone induces warm sea surface temperature (SST) anomalies through modulating surface heat fluxes. These warm SST anomalies are able to maintain into the following spring and summer through an air-sea coupled process and in turn induce significant westerly wind anomalies over the tropical western Pacific. In contrast, the NPO-El Niño relationship is unclear when the NPO-related anomalous cyclone over the subtropical North Pacific is confined to off-equatorial regions and cannot induce significant warm SST anomalies over the subtropical North Pacific. The present study suggests that definitions of NPO should be taken into account when using NPO to predict ENSO. In particular, we recommend defining the NPO index based on the empirical orthogonal function technique over appropriate region that does not extend too far north. © 2017, Springer-Verlag Berlin Heidelberg. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109482
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: Center for Monsoon System Research, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China; State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China
Recommended Citation:
Chen S.,Wu R.. Impacts of winter NPO on subsequent winter ENSO: sensitivity to the definition of NPO index[J]. Climate Dynamics,2018-01-01,50(2018-01-02)