| DOI: | 10.1175/JCLI-D-18-0337.1
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| Scopus记录号: | 2-s2.0-85061826181
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| 论文题名: | On the mechanisms of pacific decadal oscillation modulation in a warming climate |
| 作者: | Geng T.; Yang Y.; Wu L.
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| 刊名: | Journal of Climate
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| ISSN: | 8948755
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| 出版年: | 2019
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| 卷: | 32, 期:5 | | 起始页码: | 1443
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| 结束页码: | 1459
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| 语种: | 英语
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| Scopus关键词: | Global warming
; Mechanical waves
; Ocean currents
; Coupled Model Intercomparison Project
; Decadal variability
; Higher frequencies
; Pacific decadal oscillation
; Potential mechanism
; Rate influences
; Theoretical modeling
; Warming climate
; Climate models
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| 英文摘要: | Changes of the Pacific decadal oscillation (PDO) under global warming are investigated by using outputs from phase 5 of the Coupled Model Intercomparison Project (CMIP5) and a theoretical midlatitude air-sea coupledmodel. In a warming climate, the decadal variability of the PDOis found to be significantly suppressed, with the amplitude reduced and the decadal cycle shifted toward a higher-frequency band.We used the theoretical model put forward byGoodman andMarshall (herein theGMmodel) to underpin the potential mechanisms. The GM model exhibits a growing coupled mode that resembles the simulated PDO. It is found that the suppression of the PDO appears to be associated with the acceleration of Rossby waves due to the enhanced oceanic stratification under global warming. This shortens the PDO period and reduces PDO amplitude by limiting the growth time of the coupled mode. The GM model also suggests that the increase of growth rate due to strengthening of oceanic stratification tends to magnify the PDO amplitude, counteracting the Rossby wave effect. This growth rate influence, however, plays a secondary role. © 2019, American Meteorological Society. |
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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/117186
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| Appears in Collections: | 气候变化与战略
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| Recommended Citation: | |
Geng T.,Yang Y.,Wu L.. On the mechanisms of pacific decadal oscillation modulation in a warming climate[J]. Journal of Climate,2019-01-01,32(5)
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