气候变化领域集成服务门户(CCPortal): The Biogeochemical Structure of Southern Ocean Mesoscale Eddies

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DOI	10.1029/2020JC016115
	The Biogeochemical Structure of Southern Ocean Mesoscale Eddies
	Patel R.S.; Llort J.; Strutton P.G.; Phillips H.E.; Moreau S.; Conde Pardo P.; Lenton A.
发表日期	2020
ISSN	21699275
卷号	125 期号:8
英文摘要	Mesoscale eddies play a key role in modulating physical and biogeochemical properties across the global ocean. They also play a central role in cross-frontal transport of heat, freshwater, and carbon, especially in the Southern Ocean. However, the role that eddies play in the biogeochemical cycles is not yet well constrained, partly due to a lack of observations below the surface. Here, we use hydrographic data from two voyages, conducted in the austral summer and autumn, to document the vertical biogeochemical structure of two mesoscale cyclonic eddies and quantify the role of these eddies in the meridional transport of nutrients across the Subantarctic Front. Our study demonstrates that the nutrient distribution is largely driven by eddy dynamics, yielding identical eddy structure below the mixed layer in both seasons. This result allowed us to relate nutrient content to dynamic height and estimate the average transport by eddies across the Subantarctic Front. We found that relative to Subantarctic Zone waters, long-lived cold-core eddies carry nitrate anomalies of 1.6±0.2×1010 moles and silicate anomalies of −5.5±0.7×1010 moles across the fronts each year. This cross-frontal transport of nutrients has negligible impact on Subantarctic Zone productivity; however, it has potential to modify the nutrient content of mode waters that are exported from the Southern Ocean to lower latitudes. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	biogeochemical structure; meridional transport; mesoscale eddies; nutrient transport; Southern Ocean
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/186745
作者单位	Institute for Marine and Antarctic Studies (IMAS), University of Tasmania (UTas), Hobart, TAS, Australia; Australian Research Council Centre of Excellence for Climate System Science, University of Tasmania, Hobart, TAS, Australia; Barcelona Supercomputing Center, Barcelona, Spain; Australian Research Council centre of Excellence for Climate Extremes, University of Tasmania, Hobart, TAS, Australia; Norwegian Polar Institute, Fram Center, Tromsø, Norway; Australian Research Council Antarctic Gateway Partnership, University of Tasmania, Hobart, TAS, Australia; Antarctic Climate and Ecosystems Cooperative Research Centre, University of Tasmania, Hobart, TAS, Australia; Commonwealth Scientific and Industrial Research Organisation (CSIRO) Oceans and Atmosphere, Castray Esplanade, Hobart, TAS, Australia; Centre for Southern Hemisphere Oceans Research, CSIRO, Castray Esplanade, Hobart, TAS, Australia; Australian Antarctic Program Partnership, IMAS-UTas, Hobart, TAS, Australia
推荐引用方式 GB/T 7714	Patel R.S.,Llort J.,Strutton P.G.,et al. The Biogeochemical Structure of Southern Ocean Mesoscale Eddies[J],2020,125(8).
APA	Patel R.S..,Llort J..,Strutton P.G..,Phillips H.E..,Moreau S..,...&Lenton A..(2020).The Biogeochemical Structure of Southern Ocean Mesoscale Eddies.Journal of Geophysical Research: Oceans,125(8).
MLA	Patel R.S.,et al."The Biogeochemical Structure of Southern Ocean Mesoscale Eddies".Journal of Geophysical Research: Oceans 125.8(2020).