Impact of Reactive Nitrogen and Nitrogen Footprint

Oita, Azusa; Nagano, Ichiro; Matsuda, Hiroyuki

doi:10.1007/978-981-33-6934-4_5

Ecological Risk Management

2021

DOI: 10.1007/978-981-33-6934-4_5

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Impact of Reactive Nitrogen and Nitrogen Footprint

Azusa Oita

Ichiro Nagano

Hiroyuki Matsuda

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2024

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Modeling the Spatial Flows of Nitrogen: The Case of Xiamen

Li,

Zhang,

Wang

et al. 2024

Atmosphere

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Rapid city expansion and intensive human activities have remarkably affected nitrogen flow, leading to increasingly intricate spatial heterogeneity of nitrogen flow. Focused on the temporal characteristics of nitrogen flow at certain city scales, the existing research has missed comprehensive grid-scale spatial models for nitrogen flow. To address this gap, this study develops a comprehensive spatial model for nitrogen flow by incorporating both natural and anthropic processes. Taking Xiamen as its research case, this study utilizes grid technology and spatial analysis to build a detailed spatial model for nitrogen flow at the grid scale. The results of spatial characteristics of Xiamen in 2015 revealed that hotspots of nitrogen input were primarily located in the surrounding areas outside and east of Xiamen, with the maximum nitrogen input reaching 20.07 × 104 kg/ha. However, the hotspots of nitrogen load in the atmosphere were concentrated in the urban center (i.e., Xiamen Island) and the nearby sea areas. The maximum nitrogen outputs can reach 18.32 × 104 kg/ha, which is 18 times the total nitrogen output to the water environment. Additionally, it was found that a significant gradient correlation exists between nitrogen flow and population density. These findings provide support for low-nitrogen spatial planning and emission reduction policymaking.

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Modeling the Spatial Flows of Nitrogen: The Case of Xiamen

Li,

Zhang,

Wang

et al. 2024

Atmosphere

View full text Add to dashboard Cite

show abstract

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Impact of Reactive Nitrogen and Nitrogen Footprint

Cited by 1 publication

References 75 publications

Modeling the Spatial Flows of Nitrogen: The Case of Xiamen

Modeling the Spatial Flows of Nitrogen: The Case of Xiamen

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