DOI: 10.1175/JCLI-D-16-0680.1
Scopus记录号: 2-s2.0-85020010216
论文题名: Asymmetric modulation of El Niño and La Niña and the linkage to tropical Pacific decadal variability
作者: Okumura Y.M. ; Sun T. ; Wu X.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2017
卷: 30, 期: 12 起始页码: 4705
结束页码: 4733
语种: 英语
Scopus关键词: Atmospheric pressure
; Atmospheric temperature
; Atmospheric thermodynamics
; Climate models
; Climatology
; Modulation
; Oceanography
; Stochastic models
; Stochastic systems
; Surface waters
; Tropics
; Atmosphere-ocean interactions
; Community climate system model
; ENSO
; Inter-decadal pacific oscillations
; Pacific decadal oscillation
; Pacific decadal variabilities
; Pacific ocean
; Sea Surface Temperature gradients
; Nickel
; air-sea interaction
; atmosphere-ocean coupling
; atmospheric convection
; climate modeling
; decadal variation
; El Nino
; El Nino-Southern Oscillation
; La Nina
; Pacific Decadal Oscillation
; sea surface temperature
; Pacific Ocean
; Pacific Ocean (Tropical)
英文摘要: El Niño-Southern Oscillation (ENSO) in a 1300-yr preindustrial control simulation of the Community Climate System Model, version 4 (CCSM4), exhibits distinct modulation in association with tropical Pacific decadal variability (TPDV). The frequency and duration of El Niño events modulate with changes in the interbasin sea surface temperature (SST) gradient related to the leading mode of TPDV, which resembles the interdecadal Pacific oscillation (IPO). La Niña shows similar changes with the IPO but is also controlled by changes in El Niño that often precedes La Niña, and these effects tend to cancel each other. The amplitude of ENSO, on the other hand, is closely related to the second leading mode of TPDV that affects the zonal and meridional contrast of tropical Pacific climate. Significant changes in the pattern and seasonal evolution related to this TPDV mode are found mainly for El Niño because of the nonlinear relation between the atmospheric deep convection and SSTs. The resultant changes in the amplitude of El Niño, in turn, affect the amplitude and duration of the following La Niña, as well as the asymmetry in their patterns and duration. The decadal ENSO modulation associated with both TPDV modes is not symmetrical between El Niño and La Niña and thus is not likely to occur solely as a result of random variability. The patterns of TPDV in CCSM4 have resemblance to those simulated by its atmospheric component coupled to a slab ocean model, suggesting that TPDV induced by stochastic atmospheric variability interacts with the ENSO dynamics. © 2017 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/48872
Appears in Collections: 气候变化与战略
There are no files associated with this item.
作者单位: Institute for Geophysics, Jackson School of Geosciences, The University of Texas at Austin, Austin, TX, United States
Recommended Citation:
Okumura Y.M.,Sun T.,Wu X.. Asymmetric modulation of El Niño and La Niña and the linkage to tropical Pacific decadal variability[J]. Journal of Climate,2017-01-01,30(12)