| DOI: | 10.1007/s00382-014-2456-2
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| Scopus记录号: | 2-s2.0-84925536340
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| 论文题名: | Pacific variability under present-day and Middle Miocene boundary conditions |
| 作者: | Krapp M.; Jungclaus J.H.
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| 刊名: | Climate Dynamics
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| ISSN: | 9307575
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| 出版年: | 2015
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| 卷: | 44, 期:2017-09-10 | | 起始页码: | 2609
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| 结束页码: | 2621
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| 语种: | 英语
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| 英文关键词: | Climate variability
; ENSO
; Middle Miocene
; MPI-ESM
; PDO
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| 英文摘要: | We use the coupled climate model MPI-ESM to show that for higher CO2 levels the El Niño-Southern Oscillation (ENSO) and the Pacific Decadal Oscillation (PDO) merge into a single mode of Pacific variability, regardless of present-day or Middle Miocene (~15 Ma) topographic boundary conditions. Hence, topographic differences—determining the landscape of past climates—play a smaller role for Pacific variability than previously thought. We attribute the single variability mode to resonance between these two oscillation patterns. In order to estimate the strength of the resonance we compute the spectral power of the ENSO and PDO time series and their coherence. We find that for both Middle Miocene and present-day topographic conditions, higher CO2 forcing leads to stronger resonance between ENSO and PDO. Our results show that (1) stronger CO2 forcing enhances Pacific variability resulting in stronger “atmospheric bridge” and that (2) past climates are likely to exhibit Pacific variability corresponding either to ENSO, PDO, or our proposed single mode. © 2015, Springer-Verlag Berlin Heidelberg. |
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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/54146
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| Appears in Collections: | 过去全球变化的重建
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作者单位: | Max Planck Institute for Meteorology, Hamburg, Germany; Potsdam Institute for Climate Impact Research, Potsdam, Germany
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| Recommended Citation: | |
Krapp M.,Jungclaus J.H.. Pacific variability under present-day and Middle Miocene boundary conditions[J]. Climate Dynamics,2015-01-01,44(2017-09-10)
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