DOI: 10.1002/2015GL066281
论文题名: ENSO and meridional modes: A null hypothesis for Pacific climate variability
作者: Di Lorenzo E. ; Liguori G. ; Schneider N. ; Furtado J.C. ; Anderson B.T. ; Alexander M.A.
刊名: Geophysical Research Letters
ISSN: 0094-8468
EISSN: 1944-8199
出版年: 2015
卷: 42, 期: 21 起始页码: 9440
结束页码: 9448
语种: 英语
英文关键词: El Niño-Southern Oscillation
; Pacific climate variability
; Pacific decadal variability
Scopus关键词: Atmospheric pressure
; Atmospheric temperature
; Climate models
; Nickel
; Oceanography
; Stochastic models
; Stochastic systems
; Surface waters
; Tropics
; Atmospheric feedbacks
; Atmospheric teleconnections
; Climate variability
; Low frequency variability
; Pacific decadal variabilities
; Sea surface temperature (SST)
; Southern oscillation
; Stochastic excitations
; Climatology
; atmosphere-ocean coupling
; climate feedback
; climate modeling
; climate variation
; decadal variation
; El Nino-Southern Oscillation
; frequency analysis
; meridional circulation
; Pacific Decadal Oscillation
; sea surface temperature
; stochasticity
; teleconnection
; variance analysis
; Pacific Ocean
英文摘要: Pacific low-frequency variability (timescale > 8 years) exhibits a well-known El Niño-like pattern of basin-scale sea surface temperature, which is found in all the major modes of Pacific decadal climate. Using a set of climate model experiments and observations, we decompose the mechanisms contributing to the growth, peak, and decay of the Pacific low-frequency spatial variance. We find that the El Niño-like interdecadal pattern is established through the combined actions of Pacific meridional modes (MM) and the El Niño-Southern Oscillation (ENSO). Specifically, in the growth phase of the pattern, subtropical stochastic excitation of the MM energizes the tropical low-frequency variance acting as a red noise process. Once in the tropics, this low-frequency variance is amplified by ocean-atmospheric feedbacks as the pattern reaches its peak phase. At the same time, atmospheric teleconnections distribute the variance from the tropics to the extratropics, where the pattern ultimately decays. In this stochastic red noise model of Pacific climate, the timescale of the extra-tropical/tropical interactions (1-2 years) permits the stochastic excitation of the ENSO-like pattern of decadal and interdecadal variance. © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84955206432&doi=10.1002%2f2015GL066281&partnerID=40&md5=ae1e79ee17fbe202d9118a45c36ae708
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8084
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA, United States
Recommended Citation:
Di Lorenzo E.,Liguori G.,Schneider N.,et al. ENSO and meridional modes: A null hypothesis for Pacific climate variability[J]. Geophysical Research Letters,2015-01-01,42(21).