globalchange  > 过去全球变化的重建
DOI: 10.1007/s00382-014-2228-z
Scopus记录号: 2-s2.0-84939895863
论文题名:
Tropical Atlantic influence on Pacific variability and mean state in the twentieth century in observations and CMIP5
作者: Kucharski F.; Syed F.S.; Burhan A.; Farah I.; Gohar A.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2014
卷: 44, 期:2017-03-04
起始页码: 881
结束页码: 896
语种: 英语
英文关键词: CMIP5 ; Teleconnection ; Tropical Atlantic ; Tropical Pacific
英文摘要: This paper investigates the influence of the tropical Atlantic on the tropical Pacific interannual variability and mean state in the twentieth century. It is demonstrated that observational datasets show a significant time-delayed impact of the tropical Atlantic on tropical Pacific sea surface temperatures, leading to an anticorrelation between the tropical Atlantic and the eastern Pacific if the Atlantic is leading by about 10 months. This result is robust across different sea surface temperature reconstructions. There is no robust correlation between the tropical Atlantic and the eastern Pacific when the Pacific is leading, although in recent decades a positive correlation between the two basins is more dominant. An analysis of the surface pressure response to the tropical Atlantic indicates an atmospheric bridge and a modification of the Walker circulation as the likely trigger for the teleconnection, and this result is consistent with recent observational and modelling results for the recent decades. 30 out of the analyzed 45 World Climate Research Program’s Coupled Model Intercomparison Project Phase 5 (CMIP5) models show statistically significant anticorrelations between individual tropical Atantic warm and cold events and the time-lagged eastern Pacific sea surface temperatues. 16 out of the 45 analyzed models fulfill the more stringent criterion of lead–lag correlations between the tropical Atlantic and Pacific similar to the observations. The atmospheric bridge mechanism seems also valid in the selected CMIP5 models. We have identified the tropical Atlantic warm bias present in nearly all models as one potential candidate for the overall weak time-delayed teleconnection between the tropical Atlantic and the Pacific, but also other mean state biases are important. In the selected models a stronger warming of the tropical Atlantic Ocean compared to the global sea surface temperature mean is associated with a La Nina-like mean state change in the tropical Pacific. However, the ensemble mean of these models still shows a weakly El Nino-like trend, which is associated with a relatively weak Atlantic warming compared to the global mean and the observations. © 2014, Springer-Verlag Berlin Heidelberg.
资助项目: DOE, U.S. Department of Energy ; NOAA, U.S. Department of Energy
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/54506
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作者单位: Earth System Physics Section, Abdus Salam International Centre for Theoretical Physics, Trieste, Italy; Department of Meteorology, COMSATS Institute of Information Technology, Islamabad, Pakistan; Pakistan Meteorological Department, Islamabad, Pakistan; Center of Excellence for Climate Change Research/Department of Meteorology King Abdulaziz University, Jeddah, Saudi Arabia

Recommended Citation:
Kucharski F.,Syed F.S.,Burhan A.,et al. Tropical Atlantic influence on Pacific variability and mean state in the twentieth century in observations and CMIP5[J]. Climate Dynamics,2014-01-01,44(2017-03-04)
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