globalchange  > 气候减缓与适应
DOI: 10.1038/ngeo2570
论文题名:
Boundaries of the Peruvian oxygen minimum zone shaped by coherent mesoscale dynamics
作者: Bettencourt J.H.; Lopez C.; Hernandez-Garcia E.; Montes I.; Sudre J.; Dewitte B.; Paulmier A.; Garçon V.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2015
卷: 8, 期:12
起始页码: 937
结束页码: 940
语种: 英语
Scopus关键词: biogeochemical cycle ; dissolved oxygen ; eddy ; front ; marine environment ; numerical model ; oxygen minimum layer ; seawater ; Peru
英文摘要: Dissolved oxygen in sea water affects marine habitats and biogeochemical cycles. Oceanic zones with oxygen deficits represent 7% of the volume and 8% of the area of the oceans, and are thought to be expanding. One of the most pronounced lies in the region off Peru, where mesoscale activity in the form of fronts and eddies is strong. Here, we study the dynamics of the Peruvian oxygen minimum zone in a Lagrangian framework, using a coupled physical-biogeochemical numerical model and finite-size Lyapunov exponent fields, to evaluate the role of mesoscale activity. We find that, at depths between 380 and 600 m, mesoscale structures have two distinct roles. First, their mean positions and paths delimit and maintain the oxygen minimum zone boundaries. Second, their high-frequency fluctuations inject oxygen across the oxygen minimum zone boundaries and eddy fluxes are one order of magnitude higher than mean oxygen fluxes. We conclude that these eddy fluxes contribute to the ventilation of the Peruvian oxygen minimum zone. © 2015 Macmillan Publishers Limited.
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被引频次[WOS]:53   [查看WOS记录]     [查看WOS中相关记录]
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/106126
Appears in Collections:气候减缓与适应
科学计划与规划

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作者单位: Instituto de Física Interdisciplinar y Sistemas Complejos, Campus Universitat de les Illes Balears, Palma de Mallorca, Spain; School of Mathematics and Statistics, University College Dublin, I-Dublin, Ireland; GEOMAR, Helmholtz-Zentrum für Ozeanforschung Kiel, Wischhofstrasse 1, Kiel, Germany; Instituto Geofísico Del Perú, P-Lima, Peru; LEGOS, 18 Avenue Edouard Belin, Toulouse Cedex, France

Recommended Citation:
Bettencourt J.H.,Lopez C.,Hernandez-Garcia E.,et al. Boundaries of the Peruvian oxygen minimum zone shaped by coherent mesoscale dynamics[J]. Nature Geoscience,2015-01-01,8(12)
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