globalchange  > 气候减缓与适应
DOI: 10.1038/ngeo2717
论文题名:
Acceleration of oxygen decline in the tropical Pacific over the past decades by aerosol pollutants
作者: Ito T.; Nenes A.; Johnson M.S.; Meskhidze N.; Deutsch C.
刊名: Nature Geoscience
ISSN: 17520894
出版年: 2016
卷: 9, 期:6
起始页码: 443
结束页码: 447
语种: 英语
Scopus关键词: aerosol ; air-sea interaction ; anoxic conditions ; anthropogenic source ; atmospheric chemistry ; atmospheric deposition ; atmospheric pollution ; biogeochemical cycle ; biogeochemistry ; dissolved oxygen ; iron ; oceanic circulation ; oxygen ; Pacific Ocean
英文摘要: Dissolved oxygen in the mid-depth tropical Pacific Ocean has declined in the past several decades. The resulting expansion of the oxygen minimum zone has consequences for the region's ecosystem and biogeochemical cycles, but the causes of the oxygen decline are not yet fully understood. Here we combine models of atmospheric chemistry, ocean circulation and biogeochemical cycling to test the hypothesis that atmospheric pollution over the Pacific Ocean contributed to the redistribution of oxygen in deeper waters. We simulate the pollution-induced enhancement of atmospheric soluble iron and fixed nitrogen deposition, as well as its impacts on ocean productivity and biogeochemical cycling for the late twentieth century. The model reproduces the magnitude and large-scale pattern of the observed oxygen changes from the 1970s to the 1990s, and the sensitivity experiments reveal the reinforcing effects of pollution-enhanced iron deposition and natural climate variability. Despite the aerosol deposition being the largest in mid-latitudes, its effect on oceanic oxygen is most pronounced in the tropics, where ocean circulation transports added iron to the tropics, leading to an increased regional productivity, respiration and subsurface oxygen depletion. These results suggest that anthropogenic pollution can interact and amplify climate-driven impacts on ocean biogeochemistry, even in remote ocean biomes. © 2016 Macmillan Publishers Limited.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/106001
Appears in Collections:气候减缓与适应
科学计划与规划

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作者单位: School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, GA, United States; School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, GA, United States; Institute of Chemical Engineering Sciences, Foundation for Research and Technology-Hellas, Patras, Greece; Institute for Environmental Research and Sustainable Development, National Observatory of Athens, Palea-Pendeli, Greece; Biospheric Science Branch, NASA Ames Research Center, Moffett Field, CA, United States; Marine, Earth, and Atmospheric Science, North Carolina State University, Raleigh, NC, United States; School of Oceanography, University of Washington, Seattle, WA, United States

Recommended Citation:
Ito T.,Nenes A.,Johnson M.S.,et al. Acceleration of oxygen decline in the tropical Pacific over the past decades by aerosol pollutants[J]. Nature Geoscience,2016-01-01,9(6)
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