Nitrogen futures in the shared socioeconomic pathways 4

Area of Science:

• Environmental Science
• Ecology
• Climate Science

Background:

• Human alteration of the nitrogen cycle presents significant environmental and health challenges.
• Current scenario analyses for nitrogen pollution often lack integration and a holistic approach.
• Addressing nitrogen pollution is critical for sustainable development and planetary health.

Purpose of the Study:

• To develop integrated nitrogen-focused scenarios using the Shared Socioeconomic Pathways framework.
• To incorporate major nitrogen-polluting sectors, climate policies, and nitrogen-control measures.
• To provide a foundation for evaluating future nitrogen trajectories and their impacts.

Main Methods:

• Developed novel nitrogen-focused narratives based on the Shared Socioeconomic Pathways.
• Integrated key nitrogen-polluting sectors: agriculture, industry, transport, and wastewater.
• Incorporated climate and environmental policies alongside explicit nitrogen management strategies.

Main Results:

• Established the first integrated scenario framework for nitrogen flows across multiple sectors.
• Created narratives that account for climate and pollution control influences on nitrogen.
• Laid the groundwork for future modeling of nitrogen production, consumption, and loss.

Conclusions:

• This integrated framework is essential for understanding and managing nitrogen pollution.
• It enables assessment of nitrogen impacts alongside development goals.
• It is a crucial step towards managing nitrogen within planetary boundaries.