气候变化领域集成服务门户(CCPortal): Biogeochemical Role of Subsurface Coherent Eddies in the Ocean: Tracer Cannonballs, Hypoxic Storms, and Microbial Stewpots?

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DOI	10.1002/2017GB005743
	Biogeochemical Role of Subsurface Coherent Eddies in the Ocean: Tracer Cannonballs, Hypoxic Storms, and Microbial Stewpots?
	Frenger I.; Bianchi D.; Stührenberg C.; Oschlies A.; Dunne J.; Deutsch C.; Galbraith E.; Schütte F.
发表日期	2018
ISSN	0886-6236
EISSN	1944-9224
起始页码	226
结束页码	249
卷号	32 期号:2
英文摘要	Subsurface eddies are known features of ocean circulation, but the sparsity of observations prevents an assessment of their importance for biogeochemistry. Here we use a global eddying (0.1°) ocean-biogeochemical model to carry out a census of subsurface coherent eddies originating from eastern boundary upwelling systems (EBUS) and quantify their biogeochemical effects as they propagate westward into the subtropical gyres. While most eddies exist for a few months, moving over distances of hundreds of kilometers, a small fraction (<5%) of long-lived eddies propagates over distances greater than 1,000 km, carrying the oxygen-poor and nutrient-rich signature of EBUS into the gyre interiors. In the Pacific, transport by subsurface coherent eddies accounts for roughly 10% of the offshore transport of oxygen and nutrients in pycnocline waters. This “leakage” of subsurface waters can be a significant fraction of the transport by nutrient-rich poleward undercurrents and may contribute to the well-known reduction of productivity by eddies in EBUS. Furthermore, at the density layer of their cores, eddies decrease climatological oxygen locally by close to 10%, thereby expanding oxygen minimum zones. Finally, eddies represent low-oxygen extreme events in otherwise oxygenated waters, increasing the area of hypoxic waters by several percent and producing dramatic short-term changes that may play an important ecological role. Capturing these nonlocal effects in global climate models, which typically include noneddying oceans, would require dedicated parameterizations. ©2018. American Geophysical Union. All Rights Reserved.
英文关键词	coherent; eddies; hypoxic; ocean; subsurface; transport
语种	英语
scopus关键词	biogeochemistry; census; eddy; extreme event; global climate; gyre; hypoxic conditions; oxygen; parameterization; pycnocline; subsurface flow; subtropical region; upwelling; Pacific Ocean
来源期刊	Global Biogeochemical Cycles
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/129861
作者单位	GEOMAR Helmholtz Centre for Ocean Research Kiel, Kiel, Germany; Atmospheric and Oceanic Sciences, University of California, Los Angeles, CA, United States; Kiel University, Kiel, Germany; NOAA Geophysical Fluid Dynamics Laboratory, Princeton, NJ, United States; School of Oceanography, University of Washington, Seattle, WA, United States; Institut de Ciencia i Technologia Ambientals (ICTA) and Department of Mathematics, Universitat Autonoma de Barcelona, Barcelona, Spain; Institució Catalana de Recerca i Estudis Avançats (ICREA), Barcelona, Spain
推荐引用方式 GB/T 7714	Frenger I.,Bianchi D.,Stührenberg C.,et al. Biogeochemical Role of Subsurface Coherent Eddies in the Ocean: Tracer Cannonballs, Hypoxic Storms, and Microbial Stewpots?[J],2018,32(2).
APA	Frenger I..,Bianchi D..,Stührenberg C..,Oschlies A..,Dunne J..,...&Schütte F..(2018).Biogeochemical Role of Subsurface Coherent Eddies in the Ocean: Tracer Cannonballs, Hypoxic Storms, and Microbial Stewpots?.Global Biogeochemical Cycles,32(2).
MLA	Frenger I.,et al."Biogeochemical Role of Subsurface Coherent Eddies in the Ocean: Tracer Cannonballs, Hypoxic Storms, and Microbial Stewpots?".Global Biogeochemical Cycles 32.2(2018).