DOI: 10.5194/cp-14-751-2018
Scopus记录号: 2-s2.0-85048348960
论文题名: Difference between the North Atlantic and Pacific meridional overturning circulation in response to the uplift of the Tibetan Plateau
作者: Su B. ; Jiang D. ; Zhang R. ; Sepulchre P. ; Ramstein G.
刊名: Climate of the Past
ISSN: 18149324
出版年: 2018
卷: 14, 期: 6 起始页码: 751
结束页码: 762
语种: 英语
Scopus关键词: air-sea interaction
; atmosphere-ocean coupling
; atmospheric circulation
; climate feedback
; deep water
; heat flux
; meridional circulation
; monsoon
; sea ice
; westerly
; Atlantic Ocean
; Atlantic Ocean (North)
; China
; Pacific Ocean
; Pacific Ocean (North)
; Qinghai-Xizang Plateau
英文摘要: The role of the Tibetan Plateau (TP) in maintaining the large-scale overturning circulation in the Atlantic and Pacific is investigated using a coupled atmosphere-ocean model. For the present day with a realistic topography, model simulation shows a strong Atlantic meridional overturning circulation (AMOC) but a near absence of the Pacific meridional overturning circulation (PMOC), which are in good agreement with the present observations. In contrast, the simulation without the TP depicts a collapsed AMOC and a strong PMOC that dominates deep-water formation. The switch in deep-water formation between the two basins results from changes in the large-scale atmospheric circulation and atmosphere-ocean feedback over the Atlantic and Pacific. The intensified westerly winds and increased freshwater flux over the North Atlantic cause an initial slowdown of the AMOC, while the weakened East Asian monsoon circulation and associated decreased freshwater flux over the North Pacific give rise to the initial intensification of the PMOC. The further decreased heat flux and the associated increase in sea-ice fraction promote the final AMOC collapse over the Atlantic, while the further increased heat flux leads to the final PMOC establishment over the Pacific. Although the simulations were performed in a cold world, it still importantly implicates that the uplift of the TP alone could have been a potential driver for the reorganization of PMOC-AMOC between the late Eocene and early Oligocene. © Author(s) 2018. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109560
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, 100029, China; Joint Laboratory for Climate and Environmental Change, Chengdu University of Information Technology, Chengdu, 610225, China; CAS Center for Excellence in Tibetan Plateau Earth Sciences, Beijing, 100101, China; University of Chinese Academy of Sciences, Beijing, 100049, China; Laboratoire des Sciences du Climatet de l'Environnement/ipsl, CEA-CNRS-UVSQ, Orme des Merisiers, Gif-sur-Yvette Cedex, 91191, France
Recommended Citation:
Su B.,Jiang D.,Zhang R.,et al. Difference between the North Atlantic and Pacific meridional overturning circulation in response to the uplift of the Tibetan Plateau[J]. Climate of the Past,2018-01-01,14(6)