DOI: 10.1007/s00382-015-2705-z
Scopus记录号: 2-s2.0-84931306784
论文题名: Atlantic forcing of Pacific decadal variability
作者: Kucharski F. ; Ikram F. ; Molteni F. ; Farneti R. ; Kang I.-S. ; No H.-H. ; King M.P. ; Giuliani G. ; Mogensen K.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2016
卷: 46, 期: 2017-07-08 起始页码: 2337
结束页码: 2351
语种: 英语
英文关键词: Atlantic forcing
; Climate shift
; Climate variability
; Pacific mean state change
英文摘要: This paper investigates the Atlantic Ocean influence on equatorial Pacific decadal variability. Using an ensemble of simulations, where the ICTPAGCM ("SPEEDY") is coupled to the NEMO/OPA ocean model in the Indo-Pacific region and forced by observed sea surface temperatures in the Atlantic region, it is shown that the Atlantic Multidecadal Oscillation (AMO) has had a substantial influence on the equatorial Pacific decadal variability. According to AMO phases we have identified three periods with strong Atlantic forcing of equatorial Pacific changes, namely (1) 1931-1950 minus 1910-1929, (2) 1970-1989 minus 1931-1950 and (3) 1994-2013 minus 1970-1989. Both observations and the model show easterly surface wind anomalies in the central Pacific, cooling in the central-eastern Pacific and warming in the western Pacific/Indian Ocean region in events (1) and (3) and the opposite signals in event (2). The physical mechanism for these responses is related to a modification of the Walker circulation because a positive (negative) AMO leads to an overall warmer (cooler) tropical Atlantic. The warmer (cooler) tropical Atlantic modifies the Walker circulation, leading to rising (sinking) and upper-level divergence (convergence) motion in the Atlantic region and sinking (rising) motion and upper-level convergence (divergence) in the central Pacific region. © Springer-Verlag Berlin Heidelberg 2015. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/53679
Appears in Collections: 过去全球变化的重建
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作者单位: Abdus Salam International Centre for Theoretical Physics, Earth System Physics Section, Strada Costiera 11, Trieste, Italy; Center of Excellence for Climate Change Research, Department of Meteorology, King Abdulaziz University, Jeddah, Saudi Arabia; Pakistan Meteorological Department, Islamabad, Pakistan; European Centre For Medium-Range Weather Forecasts, Shinfield Park, Reading, Berkshire, United Kingdom; Seoul National University, Seoul, South Korea; Uni Research Climate and Bjerknes Centre, Bergen, Norway
Recommended Citation:
Kucharski F.,Ikram F.,Molteni F.,et al. Atlantic forcing of Pacific decadal variability[J]. Climate Dynamics,2016-01-01,46(2017-07-08)