DOI: 10.1038/s41561-019-0517-1
论文题名: Density-compensated overturning in the Labrador Sea
作者: Zou S. ; Lozier M.S. ; Li F. ; Abernathey R. ; Jackson L.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2020
卷: 13, 期: 2 起始页码: 121
结束页码: 126
语种: 英语
英文关键词: air-sea interaction
; atmosphere-ocean coupling
; atmospheric convection
; boundary current
; greenhouse gas
; meridional circulation
; oceanic circulation
; salinity
; Atlantic Ocean
; Atlantic Ocean (North)
; Labrador Sea
英文摘要: The Atlantic Meridional Overturning Circulation, a key constituent of the climate system, is projected to slow down in the twenty-first century due to a weakening of the Labrador Sea convection, itself a response to greenhouse gas warming and/or enhanced freshwater flux from the Arctic. However, the first observations from the Overturning in the Subpolar North Atlantic Program reveal a minimal response of the Meridional Overturning Circulation to the strong Labrador Sea convection during the winters of 2015–2016. From an analysis of the observational and reanalysis data, we show here that this weak response can be explained by a strong density compensation in the Labrador Sea. Although convection induces important changes of temperature and salinity in the basin interior, the export of the thermal and haline anomalies to the boundary current largely takes place along density surfaces. As a result, the transformation across density surfaces, that is, the imprint on the overturning circulation, is relatively small. This finding highlights the critical relationship between temperature and salinity in determining the overturning strength in the Labrador Sea and underlines the necessity of accurate freshwater flux estimates for improved Meridional Overturning Circulation predictions. © 2020, The Author(s), under exclusive licence to Springer Nature Limited. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/169700
Appears in Collections: 气候变化与战略
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作者单位: Duke University, Durham, NC, United States; Columbia University/Lamont Doherty Earth Observatory, New York, NY, United States; Met Office, Exeter, United Kingdom; Woods Hole Oceanographic Institution, Woods Hole, MA, United States; Georgia Institute of Technology, Atlanta, GA, United States
Recommended Citation:
Zou S.,Lozier M.S.,Li F.,et al. Density-compensated overturning in the Labrador Sea[J]. Nature Geoscience,2020-01-01,13(2)