DOI: 10.1038/s41561-021-00716-1
论文题名: Atlantic Equatorial Undercurrent intensification counteracts warming-induced deoxygenation
作者: Brandt P. ; Hahn J. ; Schmidtko S. ; Tuchen F.P. ; Kopte R. ; Kiko R. ; Bourlès B. ; Czeschel R. ; Dengler M.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2021
卷: 14, 期: 5 起始页码: 278
结束页码: 282
语种: 英语
英文关键词: air-sea interaction
; atmospheric circulation
; concentration (composition)
; marine ecosystem
; oceanic circulation
; trade wind
; upper ocean
; Atlantic Ocean
; Atlantic Ocean (Equatorial)
; Atlantic Ocean (North)
英文摘要: The tropical Atlantic upper-ocean circulation experiences multiannual to decadal changes associated with different climate modes and is simultaneously adjusting to climate warming. The most energetic current in the tropical Atlantic is the Equatorial Undercurrent (EUC), which flows eastwards along the Equator. On the basis of long-term moored observations, we show that the EUC strengthened by more than 20% from 2008 to 2018. The intensification of the EUC is associated with increasing subsurface oxygen concentrations and a thickening of the upper-ocean oxygenated layer in the equatorial Atlantic. These changes counteract climate-warming-induced deoxygenation in the region. The EUC strengthening is found to be mainly forced by trade wind changes in the western tropical North Atlantic. A 60-yr dataset reveals that the recent oxygen increase in the upper equatorial Atlantic is associated with multidecadal variability. This variability is characterized by low oxygen concentrations in the 1990s and early 2000s, and high oxygen concentrations in the 1960s and 1970s. The observed oxygen variability seems to be linked to a compression and expansion of the habitat of tropical pelagic fish, and must be accounted for when evaluating the possible consequences of deoxygenation for marine ecosystems and fisheries. © 2021, 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/169721
Appears in Collections: 气候变化与战略
There are no files associated with this item.
作者单位: GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany; Faculty of Mathematics and Natural Sciences, Kiel University, Kiel, Germany; Institute of Geosciences, Kiel University, Kiel, Germany; Laboratoire d’Océanographie de Villefranche, Sorbonne Université, Villefranche-sur-Mer, France; Instrumentation, Moyens Analytiques, Observations en Géophysique et Océanographie, IRD, Plouzané, France
Recommended Citation:
Brandt P.,Hahn J.,Schmidtko S.,et al. Atlantic Equatorial Undercurrent intensification counteracts warming-induced deoxygenation[J]. Nature Geoscience,2021-01-01,14(5)