gchange  > 气候变化与战略
DOI: 10.1175/JCLI-D-18-0337.1
Scopus ID: 2-s2.0-85061826181
Title:
On the mechanisms of pacific decadal oscillation modulation in a warming climate
Author: Geng T.; Yang Y.; Wu L.
Source Publication: Journal of Climate
ISSN: 8948755
Indexed By: SCI ; SCI-E ; EI
Publishing Year: 2019
Volume: 32, Issue:5
pages begin: 1443
pages end: 1459
Language: 英语
Scopus Keyword: 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
English Abstract: 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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被引频次[WOS]:1   [查看WOS记录]     [查看WOS中相关记录]
Document Type: 期刊论文
Identifier: http://119.78.100.177/globalchange/handle/2HF3EXSE/117186
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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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