globalchange  > 气候变化与战略
DOI: 10.1073/pnas.1801049115
论文题名:
Natural forcing of the North Atlantic nitrogen cycle in the Anthropocene
作者: Wang X.T.; Cohen A.L.; Luu V.; Ren H.; Su Z.; Haug G.H.; Sigman D.M.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2018
卷: 115, 期:42
起始页码: 10606
结束页码: 10611
语种: 英语
英文关键词: Anthropocene ; Atmospheric deposition ; Nitrogen cycle ; North Atlantic
Scopus关键词: nitrogen ; sea water ; Atlantic Ocean ; atmosphere ; coral reef ; ecosystem ; human ; human activities ; nitrogen cycle ; North America ; temperature ; Atlantic Ocean ; Atmosphere ; Coral Reefs ; Ecosystem ; Human Activities ; Humans ; Nitrogen ; Nitrogen Cycle ; North America ; Seawater ; Temperature
英文摘要: Human alteration of the global nitrogen cycle intensified over the 1900s. Model simulations suggest that large swaths of the open ocean, including the North Atlantic and the western Pacific, have already been affected by anthropogenic nitrogen through atmospheric transport and deposition. Here we report an ∼130-yearlong record of the 15N/14N of skeleton-bound organic matter in a coral from the outer reef of Bermuda, which provides a test of the hypothesis that anthropogenic atmospheric nitrogen has significantly augmented the nitrogen supply to the open North Atlantic surface ocean. The Bermuda 15N/14N record does not show a longterm decline in the Anthropocene of the amplitude predicted by model simulations or observed in a western Pacific coral 15N/14N record. Rather, the decadal variations in the Bermuda 15N/14N record appear to be driven by the North Atlantic Oscillation, most likely through changes in the formation rate of Subtropical Mode Water. Given that anthropogenic nitrogen emissions have been decreasing in North America since the 1990s, this study suggests that in the coming decades, the open North Atlantic will remain minimally affected by anthropogenic nitrogen deposition. © 2018 National Academy of Sciences. All rights reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/163654
Appears in Collections:气候变化与战略

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作者单位: Wang, X.T., Department of Geosciences, Princeton University, Princeton, NJ 08544, United States, Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125, United States; Cohen, A.L., Department of Marine Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole, MA 02540, United States; Luu, V., Department of Geosciences, Princeton University, Princeton, NJ 08544, United States; Ren, H., Department of Geosciences, National Taiwan University, Taipei, 106, Taiwan; Su, Z., Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125, United States; Haug, G.H., Climate Geochemistry Department, Max Planck Institute for Chemistry, Mainz, 55128, Germany; Sigman, D.M., Department of Geosciences, Princeton University, Princeton, NJ 08544, United States

Recommended Citation:
Wang X.T.,Cohen A.L.,Luu V.,et al. Natural forcing of the North Atlantic nitrogen cycle in the Anthropocene[J]. Proceedings of the National Academy of Sciences of the United States of America,2018-01-01,115(42)
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