| DOI: | 10.1175/JCLI-D-17-0716.1
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| Scopus记录号: | 2-s2.0-85047073988
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| 论文题名: | The tropospheric pathway of the ENSO-North Atlantic teleconnection |
| 作者: | Jiménez-Esteve B.; Domeisen D.I.V.
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| 刊名: | Journal of Climate
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| ISSN: | 8948755
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| 出版年: | 2018
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| 卷: | 31, 期:11 | | 起始页码: | 4563
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| 结束页码: | 4584
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| 语种: | 英语
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| 英文关键词: | ENSO
; North Atlantic Oscillation
; Rossby waves
; Stratosphere
; Teleconnections
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| Scopus关键词: | Atmospheric pressure
; Fluxes
; Mechanical waves
; Oceanography
; Troposphere
; Upper atmosphere
; Anomalous propagation
; ENSO
; North Atlantic oscillations
; Rossby wave
; Southern oscillation
; Stratospheric vortex
; Teleconnections
; Tropospheric circulation
; Climatology
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| 英文摘要: | El Niño-Southern Oscillation (ENSO) exerts an influence on the North Atlantic-European (NAE) region. However, this teleconnection is nonlinear and nonstationary owing to the superposition and interaction of a multitude of influences on this region. The stratosphere is one of the major players in terms of the influence of the ENSO signal on this sector. Nevertheless, there are tropospheric dynamical links between the North Pacific and the North Atlantic that are clearly influenced by ENSO. This tropospheric pathway of ENSO to the NAE has received less attention. In view of this, the present study revisits the tropospheric pathway of ENSO to the North Atlantic using ECMWF reanalysis products. Anomalous propagation of transient and quasi-stationary waves across North America is analyzed with respect to their sensitivity to ENSO. Transient (quasi-stationary zonal waves 1-3) wave activity flux (WAF) from the Pacific to the Atlantic increases during El Niño (La Niña) conditions leading to a negative (positive) phase of the North Atlantic Oscillation (NAO). This response is observed from January to March for El Niño and only visible during February for La Niña events. However, the stratosphere strongly modulates this response. For El Niño (La Niña) conditions a weaker (stronger) stratospheric vortex tends to reinforce the negative (positive) NAO with the stratosphere and troposphere working in tandem, contributing to a stronger and more persistent tropospheric circulation response. These findings may have consequences for the prediction of the NAO during times with an inactive stratosphere. © 2018 American Meteorological Society. |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/111536
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| Appears in Collections: | 气候减缓与适应
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作者单位: | Institute for Atmospheric and Climate Science, ETH Zurich, Zurich, Switzerland
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| Recommended Citation: | |
Jiménez-Esteve B.,Domeisen D.I.V.. The tropospheric pathway of the ENSO-North Atlantic teleconnection[J]. Journal of Climate,2018-01-01,31(11)
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