DOI: 10.1002/2014GL061774
论文题名: Variability in subtropical-tropical cells drives oxygen levels in the tropical Pacific Ocean
作者: Duteil O. ; Böning C.W. ; Oschlies A.
刊名: Geophysical Research Letters
ISSN: 0094-9467
EISSN: 1944-9198
出版年: 2014
卷: 41, 期: 24 起始页码: 8926
结束页码: 8934
语种: 英语
英文关键词: biogeochemical modeling
; oxygen minimum zones
; Pacific Ocean
; subtropical-tropical cells
; tropical variability
Scopus关键词: Biogeochemistry
; Oceanography
; Oxygen
; Biogeochemical modeling
; Decadal variability
; Oxygen concentrations
; Oxygen minimum zone
; Pacific ocean
; Tropical Pacific ocean
; tropical variability
; Wind-driven circulation
; Tropics
; annual variation
; biogeochemical cycle
; circulation modeling
; concentration (composition)
; decadal variation
; dissolved oxygen
; nutrient cycling
; oxygen minimum layer
; subtropical region
; tropical region
; wind-driven circulation
; Pacific Ocean
英文摘要: Previous studies found a negative trend in oxygen concentrations in tropical regions during the last decades. Employing a biogeochemical circulation model, we highlight the importance of wind-driven ocean transport associated with the Subtropical-Tropical Cells (STCs) in setting the oxygen levels in the tropical ocean. The observed and simulated slowdown of the STCs by 30% from the 1960s to the 1990s caused a decrease in oxygen transport to the tropics. Transport of phosphate was similarly reduced, decreasing export production and respiration. The effects of physical transport and biological consumption partly compensate, damping oxygen interannual and decadal variability. Our results suggest that the observed residual oxygen trend in the tropical Pacific is mainly driven by changes in oxygen transport. Accordingly, the observed recent strengthening of the STCs leads us to expect a pause in the oxygen decrease or even an increase of tropical Pacific oxygen values in the near future. Key Points Subtropical connections constrain the variability of tropical biogeochemestryA vigorous wind driven-circulation fosters an oxygenated tropical oceanRespiration damps the tropical oxygen variability induced by circulation ©2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84921812121&doi=10.1002%2f2014GL061774&partnerID=40&md5=be8d79b8a9fba3cbfd64dc721549e759
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6731
Appears in Collections: 气候减缓与适应
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作者单位: GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany
Recommended Citation:
Duteil O.,Böning C.W.,Oschlies A.. Variability in subtropical-tropical cells drives oxygen levels in the tropical Pacific Ocean[J]. Geophysical Research Letters,2014-01-01,41(24).