DOI: 10.1175/JCLI-D-16-0127.1
Scopus记录号: 2-s2.0-85017119256
论文题名: Assessing the climate impacts of the observed atlantic multidecadal variability using the GFDL CM2.1 and NCAR CESM1 global coupled models
作者: Ruprich-Robert Y. ; Msadek R. ; Castruccio F. ; Yeager S. ; Delworth T. ; Danabasoglu G.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2017
卷: 30, 期: 8 起始页码: 2785
结束页码: 2810
语种: 英语
Scopus关键词: Atmospheric pressure
; Atmospheric temperature
; Climatology
; Nickel
; Oceanography
; Surface waters
; Tropics
; ENSO
; Multidecadal variability
; North American
; North Atlantic oscillations
; Pacific decadal oscillation
; Climate models
英文摘要: The climate impacts of the observed Atlantic multidecadal variability (AMV) are investigated using the GFDL CM2.1 and the NCAR CESM1 coupled climate models. The model North Atlantic sea surface temperatures are restored to fixed anomalies corresponding to an estimate of the internally driven component of the observed AMV. Both models show that during boreal summer the AMV alters the Walker circulation and generates precipitation anomalies over the whole tropical belt. A warm phase of the AMV yields reduced precipitation over the western United States, drier conditions over the Mediterranean basin, and wetter conditions over northern Europe. During boreal winter, the AMV modulates by a factor of about 2 the frequency of occurrence of El Niño and La Niña events. This response is associated with anomalies over the Pacific that project onto the interdecadal Pacific oscillation pattern (i.e., Pacific decadal oscillation-like anomalies in the Northern Hemisphere and a symmetrical pattern in the Southern Hemisphere). This winter response is a lagged adjustment of the Pacific Ocean to the AMV forcing in summer. Most of the simulated global-scale impacts are driven by the tropical part of the AMV, except for the winter North Atlantic Oscillation-like response over the North Atlantic-European region, which is driven by both the subpolar and tropical parts of the AMV. The teleconnections between the Pacific and Atlantic basins alter the direct North Atlantic local response to the AMV, which highlights the importance of using a global coupled framework to investigate the climate impacts of the AMV. The similarity of the two model responses gives confidence that impacts described in this paper are robust. © 2017 American Meteorological Society. 资助项目: NCAR, National Center for Atmospheric Research
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49719
Appears in Collections: 气候变化事实与影响
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作者单位: Atmosphere and Ocean Sciences, Princeton University, Princeton, NJ, United States; NOAA/Geophysical Fluid Dynamics Laboratory, Princeton, NJ, United States; CECI UMR 5318, CNRS/CERFACS, Toulouse, France; Climate and Global Dynamics Laboratory, National Center for Atmospheric Research, Boulder, CO, United States
Recommended Citation:
Ruprich-Robert Y.,Msadek R.,Castruccio F.,et al. Assessing the climate impacts of the observed atlantic multidecadal variability using the GFDL CM2.1 and NCAR CESM1 global coupled models[J]. Journal of Climate,2017-01-01,30(8)