globalchange  > 过去全球变化的重建
DOI: 10.1007/s00382-015-2556-7
Scopus记录号: 2-s2.0-84947488937
论文题名:
Impact of the winter North Atlantic Oscillation (NAO) on the Western Pacific (WP) pattern in the following winter through Arctic sea ice and ENSO. Part II: multi-model evaluation of the NAO–ENSO linkage
作者: Nakamura T.; Hara M.; Oshika M.; Tachibana Y.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2015
卷: 45, 期:2017-11-12
起始页码: 3547
结束页码: 3562
语种: 英语
英文关键词: ENSO ; Multi-model ensemble analysis ; NAO ; WP
英文摘要: A 1-year-lagged relationship between the North Atlantic Oscillation (NAO) in winter and El Niño/Southern Oscillation (ENSO) in the following year was examined with a multi-model ensemble analysis using Coupled Model Intercomparison Project phase 3 models. A coherency index was developed as a measure of the coherence between the NAO and ENSO in each model and used as a weighting factor in the ensemble model. Weighted multi-model ensemble means of the regressed field on the maximum covariance analysis coefficients between the surface pressure field in the North Atlantic (NAO field) and the sea surface temperature field in the equatorial Pacific (ENSO field) were explored. The results indicated that when the wintertime NAO was in its negative (positive) phase, anomalous atmospheric circulation associated with a large (small) Eurasian snow mass anomaly intensified (weakened) the Asian cold surge and the westerly wind burst (WWB) in the warm pool region. Intensification of the WWB initiates El Niño. A sensitivity experiment using an idealized dry general circulation model revealed that the atmospheric response to anomalous, near-surface cooling associated with an anomalous Eurasian snow mass induced higher surface pressure near the Tibetan plateau and thus intensified the Asian cold surge and WWB. Linear regression analyses applied to the reanalysis data strongly supported the model results. Our results therefore suggest an influence of the NAO on the initiation of El Niño via a process that involves Eurasian snow anomalies associated with the NAO phase. © 2015, The Author(s).
资助项目: MEXT, Ministry of Education, Culture, Sports, Science, and Technology
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/53921
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作者单位: National Institute of Polar Research, Tachikawa, Japan; Hokkaido University, Sapporo, Japan; Japan Agency for Marine-Earth Science and Technology, Yokohama, Japan; Climate and Ecosystems Dynamics Division, Graduate School of Bioresources, Mie University, Tsu, Japan

Recommended Citation:
Nakamura T.,Hara M.,Oshika M.,et al. Impact of the winter North Atlantic Oscillation (NAO) on the Western Pacific (WP) pattern in the following winter through Arctic sea ice and ENSO. Part II: multi-model evaluation of the NAO–ENSO linkage[J]. Climate Dynamics,2015-01-01,45(2017-11-12)
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