DOI: 10.1175/JCLI-D-11-00573.1
Scopus记录号: 2-s2.0-84867681273
论文题名: Influence of ENSO on Pacific decadal variability: An analysis based on the NCEP climate forecast system
作者: Wang H. ; Kumar A. ; Wang W. ; Xue Y.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2012
卷: 25, 期: 18 起始页码: 6136
结束页码: 6151
语种: 英语
Scopus关键词: Aleutian low
; Atmospheric anomaly
; Climate forecasts
; Coupled models
; Decadal timescale
; Decadal variability
; Empirical Orthogonal Function
; ENSO
; Fully-coupled
; Influence of ENSO
; Interannual time scale
; National centers for environmental predictions
; North Pacific
; North Pacific Ocean
; Pacific decadal oscillation
; Pacific decadal variabilities
; Sea surface temperature (SST)
; Spectral peak
; SST anomalies
; Surface winds
; Time-scales
; Tropical Pacific ocean
; Atmospheric pressure
; Climatology
; Computer simulation
; Forecasting
; Nickel compounds
; Time measurement
; Climate models
; annual variation
; climate modeling
; climate prediction
; computer simulation
; decadal variation
; El Nino-Southern Oscillation
; Pacific Decadal Oscillation
; sea surface temperature
; temperature anomaly
; timescale
; Pacific Ocean
; Pacific Ocean (North)
; Pacific Ocean (Tropical)
英文摘要: The influence of El Niño-Southern Oscillation (ENSO) on Pacific decadal variability (PDV) is investigated by comparing two 500-yr simulations with the National Centers for Environmental Prediction (NCEP) Climate Forecast System coupled model. One simulation is a no-ENSO run, in which model daily sea surface temperature (SST) in the tropical Pacific Ocean is relaxed to the observed climatology. The other simulation is a fully coupled run and retains ENSO variability. The PDV considered in this study is the first two empirical orthogonal functions of monthly SST anomalies in the North Pacific: the Pacific decadal oscillation (PDO) and the North Pacific Gyre Oscillation (NPGO). The PDO in the no-ENSO run can be clearly identified. Without ENSO, the PDO displays relatively higher variance at the decadal time scale and no spectral peak at the interannual time scale. In the ENSO run, the PDO variability increases slightly. ENSO not only enhances the variability of the PDO at the interannual time scale, but also shifts the PDO to longer time scales-both consistent with observations. ENSO modulates the Aleutian low and associated surface wind over the North Pacific. The latter, in turn, helps establish a more persistent PDO in the ENSO run. The results also indicate a PDO modulation of global ENSO impacts and the linearity in the superposition of the ENSO-forced and PDO-related atmospheric anomalies. Compared to observations, the NPGO in both simulations lacks power at the time scale longer than 30 yr. On the decadal time scale, the variability of the NPGO is weaker in the ENSO run than in the no-ENSO run. © 2012 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52277
Appears in Collections: 气候变化事实与影响
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作者单位: Climate Prediction Center, NCEP/NWS/NOAA, Camp Springs, MD, United States; Wyle Science, Technology and Engineering Group, McLean, VA, United States
Recommended Citation:
Wang H.,Kumar A.,Wang W.,et al. Influence of ENSO on Pacific decadal variability: An analysis based on the NCEP climate forecast system[J]. Journal of Climate,2012-01-01,25(18)