气候变化领域集成服务门户(CCPortal): Convergent evidence for widespread rock nitrogen sources in Earth's surface environment

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DOI	10.1126/science.aan4399
	Convergent evidence for widespread rock nitrogen sources in Earth's surface environment
	Houlton B.Z.; Morford S.L.; Dahlgren R.A.
发表日期	2018
ISSN	0036-8075
起始页码	58
结束页码	62
卷号	360 期号:6384
英文摘要	Nitrogen availability is a pivotal control on terrestrial carbon sequestration and global climate change. Historical and contemporary views assume that nitrogen enters Earth's land-surface ecosystems from the atmosphere. Here we demonstrate that bedrock is a nitrogen source that rivals atmospheric nitrogen inputs across major sectors of the global terrestrial environment. Evidence drawn from the planet's nitrogen balance, geochemical proxies, and our spatial weathering model reveal that ~19 to 31 teragrams of nitrogen are mobilized from near-surface rocks annually. About 11 to 18 teragrams of this nitrogen are chemically weathered in situ, thereby increasing the unmanaged (preindustrial) terrestrial nitrogen balance from 8 to 26%. These findings provide a global perspective to reconcile Earth's nitrogen budget, with implications for nutrient-driven controls over the terrestrial carbon sink. © 2018 American Association for the Advancement of Science. All Rights Reserved.
英文关键词	nitrogen; air-soil interaction; anthropogenic effect; bedrock; biogeochemical cycle; carbon sequestration; carbon sink; chemical weathering; climate change; global climate; global perspective; nitrogen; nitrogen cycle; terrestrial environment; acidification; Article; carbon sink; climate change; environmental change; geochemistry; geology; human; human activities; nitrogen availability; nitrogen balance; physical chemistry; priority journal; rock; sediment; surface area; weathering
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/244065
作者单位	Department of Land, Air and Water Resources, University of California, Davis, CA, United States; Terra Analytics, Helena, MT, United States
推荐引用方式 GB/T 7714	Houlton B.Z.,Morford S.L.,Dahlgren R.A.. Convergent evidence for widespread rock nitrogen sources in Earth's surface environment[J],2018,360(6384).
APA	Houlton B.Z.,Morford S.L.,&Dahlgren R.A..(2018).Convergent evidence for widespread rock nitrogen sources in Earth's surface environment.Science,360(6384).
MLA	Houlton B.Z.,et al."Convergent evidence for widespread rock nitrogen sources in Earth's surface environment".Science 360.6384(2018).