Aggravation of reactive nitrogen flow driven by human production and consumption in Guangzhou City China

Yue Dong, Linyu Xu (), Zhifeng Yang, Hanzhong Zheng and Lei Chen
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Yue Dong: Beijing Normal University
Linyu Xu: Beijing Normal University
Zhifeng Yang: Beijing Normal University
Hanzhong Zheng: Beijing Normal University
Lei Chen: Beijing Normal University

Nature Communications, 2020, vol. 11, issue 1, 1-10

Abstract: Abstract Human activities reshape the global nitrogen (N) cycle and affect environment and human health through reactive nitrogen (Nr) loss during production and consumption. In urbanized regions, the N cycle is greatly mediated by complex interactions between human and natural factors. However, the variations in sources, magnitude, spatiotemporal patterns and drivers of Nr flows remain unclear. Here we show by model simulations, anthropogenic perturbations not only intensify Nr input to sustain increasing demands for production and consumption in Guangzhou city, China, but also greatly change the Nr distribution pattern in the urban system, showing a substantial Nr enrichment in the atmosphere and a relatively low retention capacity of Nr in the terrestrial system. Our results highlight the strong anthropogenic effect of urban systems on the N cycle to suggest sustainable human activity changes to harmonize the relationship between Nr behaviors and human drivers.

Date: 2020
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DOI: 10.1038/s41467-020-14699-x

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