气候变化领域集成服务门户(CCPortal): Internal Tides Drive Nutrient Fluxes Into the Deep Chlorophyll Maximum Over Mid-ocean Ridges

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DOI	10.1029/2019GB006214
	Internal Tides Drive Nutrient Fluxes Into the Deep Chlorophyll Maximum Over Mid-ocean Ridges
	Tuerena R.E.; Williams R.G.; Mahaffey C.; Vic C.; Green J.A.M.; Naveira-Garabato A.; Forryan A.; Sharples J.
发表日期	2019
ISSN	0886-6236
EISSN	1944-9224
起始页码	995
结束页码	1009
卷号	33 期号:8
英文摘要	Diapycnal mixing of nutrients from the thermocline to the surface sunlit ocean is thought to be relatively weak in the world's subtropical gyres as energy inputs from winds are generally low. The interaction of internal tides with rough topography enhances diapycnal mixing, yet the role of tidally induced diapycnal mixing in sustaining nutrient supply to the surface subtropical ocean remains relatively unexplored. During a field campaign in the North Atlantic subtropical gyre, we tested whether tidal interactions with topography enhance diapycnal nitrate fluxes in the upper ocean. We measured an order of magnitude increase in diapycnal nitrate fluxes to the deep chlorophyll maximum (DCM) over the Mid-Atlantic Ridge compared to the adjacent deep ocean. Internal tides drive this enhancement, with diapycnal nitrate supply to the DCM increasing by a factor of 8 between neap and spring tides. Using a global tidal dissipation database, we find that this spring-neap enhancement in diapycnal nitrate fluxes is widespread over ridges and seamounts. Mid-ocean ridges therefore play an important role in sustaining the nutrient supply to the DCM, and these findings may have important implications in a warming global ocean. © 2019. The Authors.
英文关键词	Atlantic; gyre; mixing; nitrate; nutrients; tides
语种	英语
scopus关键词	chlorophyll; energy dissipation; gyre; internal tide; mixing; nitrate; nutrient cycling; subtropical region; thermocline; tidal cycle; Atlantic Ocean; Atlantic Ocean (North); Mid-Atlantic Ridge
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/129719
作者单位	School of Environmental Sciences, University of Liverpool, Liverpool, United Kingdom; School of GeoSciences, University of Edinburgh, Edinburgh, United Kingdom; School of Ocean and Earth Sciences, University of Southampton, Southampton, United Kingdom; School of Ocean Sciences, Bangor University, Bangor, United Kingdom
推荐引用方式 GB/T 7714	Tuerena R.E.,Williams R.G.,Mahaffey C.,et al. Internal Tides Drive Nutrient Fluxes Into the Deep Chlorophyll Maximum Over Mid-ocean Ridges[J],2019,33(8).
APA	Tuerena R.E..,Williams R.G..,Mahaffey C..,Vic C..,Green J.A.M..,...&Sharples J..(2019).Internal Tides Drive Nutrient Fluxes Into the Deep Chlorophyll Maximum Over Mid-ocean Ridges.Global Biogeochemical Cycles,33(8).
MLA	Tuerena R.E.,et al."Internal Tides Drive Nutrient Fluxes Into the Deep Chlorophyll Maximum Over Mid-ocean Ridges".Global Biogeochemical Cycles 33.8(2019).