气候变化领域集成服务门户(CCPortal): Mesoscale Variability in the Boundaries of the Oxygen Minimum Zone in the Eastern South Pacific: Influence of Intrathermocline Eddies

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DOI	10.1029/2019JC015272
	Mesoscale Variability in the Boundaries of the Oxygen Minimum Zone in the Eastern South Pacific: Influence of Intrathermocline Eddies
	Auger P.A.; Bento J.P.; Hormazabal S.; Morales C.E.; Bustamante A.
发表日期	2021
ISSN	21699275
卷号	126 期号:2
英文摘要	The vertical variability in the oxygen minimum zone (OMZ) in the eastern South Pacific (ESP; 0–40°S) is characterized by the influence of anticyclonic intrathermocline eddies (ITEs), which are subsurface-intensified mesoscale features that are frequently generated in the coastal upwelling zone off Peru and Chile. The unique lens-shaped signatures that ITEs leave on temperature, salinity, and dissolved oxygen vertical distributions are used as proxies to assess their influences on vertical OMZ boundaries and thickness. Data from in situ profiles in the region (World Ocean Database and Argo databases) are used in correlation analyses between anomalous depths (and vertical displacements) of oxyclines and isopycnals/isotherms, together with an objective eddy detection method based on satellite altimetry to identify the location of such profiles (i.e., outside or inside cyclonic and anticyclonic eddies). The results indicate that most of the vertical fluctuations in the climatological OMZ have a lens-shaped signature and that those at the mesoscale are largely due to ITEs. ITEs are a main driver of the upper oxycline variability in the coastal band, the coastal transition zone (CTZ, 3–10° from the coast) and beyond at mid-latitudes (12–26°S). The influence of ITEs on the upper and lower oxycline variability is mostly observed within the horizontal (offshore) climatological boundary of the OMZ, suggesting that ITEs play a role in the OMZ offshore extension in the ESP. ITEs may produce mesoscale variations in the thickness of the surface-oxygenated layer, resulting in potential changes in prey-predator interactions and in food web functioning. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	Argo floats; CTD-O profiles; fish habitat; OMZ; oxycline depth; subsurface eddy
语种	英语
来源期刊	Journal of Geophysical Research: Oceans
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/186450
作者单位	Instituto Milenio de Oceanografía (IMO) and Escuela de Ciencias del Mar, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile; Univ. Brest, CNRS (Centre National de la Recherche Scientifique), IRD (Institut de Recherche pour le Développement), Ifremer, Laboratoire d’Océanographie Physique et Spatiale (LOPS), IUEM, Brest, France; Escuela de Ciencias del Mar, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile; Instituto Milenio de Oceanografía (IMO) and Departamento de Oceanografía, Facultad de Ciencias Naturales y Oceanográficas, Universidad de Concepción, Concepción, Chile; División de Investigación Pesquera, Instituto de Fomento Pesquero (IFOP), Valparaíso, Chile
推荐引用方式 GB/T 7714	Auger P.A.,Bento J.P.,Hormazabal S.,et al. Mesoscale Variability in the Boundaries of the Oxygen Minimum Zone in the Eastern South Pacific: Influence of Intrathermocline Eddies[J],2021,126(2).
APA	Auger P.A.,Bento J.P.,Hormazabal S.,Morales C.E.,&Bustamante A..(2021).Mesoscale Variability in the Boundaries of the Oxygen Minimum Zone in the Eastern South Pacific: Influence of Intrathermocline Eddies.Journal of Geophysical Research: Oceans,126(2).
MLA	Auger P.A.,et al."Mesoscale Variability in the Boundaries of the Oxygen Minimum Zone in the Eastern South Pacific: Influence of Intrathermocline Eddies".Journal of Geophysical Research: Oceans 126.2(2021).