气候变化领域集成服务门户(CCPortal): Legacy nitrogen may prevent achievement of water quality goals in the Gulf of Mexico

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DOI	10.1126/science.aar4462
	Legacy nitrogen may prevent achievement of water quality goals in the Gulf of Mexico
	Van Meter K.J.; Van Cappellen P.; Basu N.B.
发表日期	2018
ISSN	0036-8075
起始页码	427
结束页码	430
卷号	360 期号:6387
英文摘要	In August 2017, the Gulf of Mexico’s hypoxic zone was declared to be the largest ever measured. It has been estimated that a 60% decrease in watershed nitrogen (N) loading may be necessary to adequately reduce eutrophication in the Gulf. However, to date there has been no rigorous assessment of the effect of N legacies on achieving water quality goals. In this study, we show that even if agricultural N use became 100% efficient, it would take decades to meet target N loads due to legacy N within the Mississippi River basin. Our results suggest that both long-term commitment and large-scale changes in agricultural management practices will be necessary to decrease Mississippi N loads and to meet current goals for reducing the size of the Gulf hypoxic zone. © 2018 American Association for the Advancement of Science. All Rights Reserved.
英文关键词	ground water; nitrogen; water; agricultural management; environmental assessment; eutrophication; hypoxic conditions; nitrogen; water quality; watershed; agricultural management; Article; Gulf of Mexico; land use; nutrient management; priority journal; river basin; soil; water quality; Atlantic Ocean; Gulf of Mexico; Mississippi River; United States
语种	英语
来源期刊	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/245833
作者单位	Department of Earth and Environmental Sciences, University of Waterloo, Waterloo, ON N2L 3G1, Canada; Ecohydrology Research Group, University of Waterloo, Waterloo, ON N2L 3G1, Canada; Water Institute, University of Waterloo, Waterloo, ON N2L 3G1, Canada; Department of Civil and Environmental Engineering, University of Waterloo, Waterloo, ON N2L 3G1, Canada
推荐引用方式 GB/T 7714	Van Meter K.J.,Van Cappellen P.,Basu N.B.. Legacy nitrogen may prevent achievement of water quality goals in the Gulf of Mexico[J],2018,360(6387).
APA	Van Meter K.J.,Van Cappellen P.,&Basu N.B..(2018).Legacy nitrogen may prevent achievement of water quality goals in the Gulf of Mexico.Science,360(6387).
MLA	Van Meter K.J.,et al."Legacy nitrogen may prevent achievement of water quality goals in the Gulf of Mexico".Science 360.6387(2018).