DOI: 10.1007/s00382-015-2520-6
Scopus记录号: 2-s2.0-84947487240
论文题名: The role of the PMOC in modulating the deglacial shift of the ITCZ
作者: Liu W. ; Hu A.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2015
卷: 45, 期: 2017-11-12 起始页码: 3019
结束页码: 3034
语种: 英语
英文关键词: AMOC
; Bering Strait
; ITCZ
; Last deglaciation
; Meridional heat transport
; PMOC
英文摘要: Based on an energy-constraint framework, the effect of the Pacific meridional overturning circulation (PMOC) has been investigated on the meridional shift of the intertropical convergence zone (ITCZ). During Heinrich Event 1, the global ITCZ displaces southward in response to a shutdown of the Atlantic meridional overturning circulation (AMOC). However, the PMOC resumes and induces an enhanced northward meridional heat transport (MHT). Further analyses show that the resumption of the PMOC and its associated MHT can relieve the decrease of oceanic cross-equatorial heat transport by the collapsed AMOC and lower the compensating decline of atmospheric cross-equatorial meridional heat transport by 0.09PW, leading to an offset of the southward shift of the global ITCZ by 0.5°. Regionally the developed PMOC does not affect the southward movement of the Atlantic ITCZ much since the latter is dominated by the collapsed AMOC that induces the change of Atlantic MHT. In contrast, the PMOC-induced northward heat transport largely abates the hemispheric temperature contrast in the tropical Pacific and reduces the southward ITCZ shift by as much as 5° in the eastern Pacific. © 2015, Springer-Verlag Berlin Heidelberg. 资助项目: NCAR, National Center for Atmospheric Research
; NSF, National Center for Atmospheric Research
; NSF, 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/53900
Appears in Collections: 过去全球变化的重建
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作者单位: Scripps Institution of Oceanography, CASPO, University of California, San Diego, 9500 Gilman Drive, La Jolla, CA, United States; Climate and Global Dynamics Division, National Center for Atmospheric Research, Boulder, CO, United States
Recommended Citation:
Liu W.,Hu A.. The role of the PMOC in modulating the deglacial shift of the ITCZ[J]. Climate Dynamics,2015-01-01,45(2017-11-12)