DOI: 10.1007/s00382-015-2774-z
Scopus记录号: 2-s2.0-84938651604
论文题名: Wind effect on the Atlantic meridional overturning circulation via sea ice and vertical diffusion
作者: Yang H. ; Wang K. ; Dai H. ; Wang Y. ; Li Q.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2016
卷: 46, 期: 2017-11-12 起始页码: 3387
结束页码: 3403
语种: 英语
英文关键词: AMOC
; Freshwater flux
; Positive feedback
; Sea ice
; Vertical diffusion
; Wind effect
英文摘要: Effects of wind and fresh water on the Atlantic meridional overturning circulation (AMOC) are investigated using a fully coupled climate model. The AMOC can change significantly when perturbed by either wind stress or freshwater flux in the North Atlantic. This study focuses on wind stress effect. Our model results show that the wind forcing is crucial in maintaining the AMOC. Reducing wind forcing over the ocean can cause immediately weakening of the vertical salinity diffusion and convection in the mid-high latitudes Atlantic, resulting in an enhancement of vertical salinity stratification that restrains the deep water formation there, triggering a slowdown of the thermohaline circulation. As the thermohaline circulation weakens, the sea ice expands southward and melts, providing the upper ocean with fresh water that weakens the thermohaline circulation further. The wind perturbation experiments suggest a positive feedback between sea-ice and thermohaline circulation strength, which can eventually result in a complete shutdown of the AMOC. This study also suggests that sea-ice variability may be also important to the natural AMOC variability on decadal and longer timescales. © 2015, The Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/53727
Appears in Collections: 过去全球变化的重建
There are no files associated with this item.
作者单位: Laboratory for Climate and Ocean-Atmosphere Studies (LaCOAS) and Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, 209 Chengfu Road, Beijing, China
Recommended Citation:
Yang H.,Wang K.,Dai H.,et al. Wind effect on the Atlantic meridional overturning circulation via sea ice and vertical diffusion[J]. Climate Dynamics,2016-01-01,46(2017-11-12)