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Guo, Y., Zhang, L., Winiwarter, W. 
ORCID: https://orcid.org/0000-0001-7131-1496, van Grinsven, H.J.M., Wang, X., Li, K., Pan, D., Liu, Z., & Gu, B.
(2024).
Ambitious nitrogen abatement is required to mitigate future global PM2.5 air pollution toward the World Health Organization targets.
One Earth 7 (9) 1600-1613. 10.1016/j.oneear.2024.08.007.
Abstract
Nitrogen oxides (NOx) and ammonia (NH3) contribute substantially to current global fine particulate matter (PM2.5) pollution. Their future role remains unclear and is complicated by interactions with background emissions. Here, we show that under climate mitigation scenarios, by 2050, a hypothetical phaseout of anthropogenic NH3 emissions would reduce PM2.5 by 20%–60% locally and be more effective than phasing out NOx. Reducing NH3 by 25%, instead, would be less effective than 25% NOx reduction for many regions. Future reductions of NOx and sulfuric dioxides from clean energy transitions would shift the nonlinear chemical regime of secondary inorganic aerosol formation toward NH3 saturation. The later NH3 controls are installed, the deeper the required reductions will be to be effective, although for many regions such levels are still within technical feasibility, while NOx controls will always remain effective. Nitrogen reductions remain useful for achieving the World Health Organization guideline target for PM2.5, and NH3 controls need to happen sooner rather than later.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | air pollution management; ammonia; climate policies; control effectiveness; emission control pathways; global air quality; nitrogen oxides; PM2.5; present and future; reactive nitrogen |
| Research Programs: | Energy, Climate, and Environment (ECE) Energy, Climate, and Environment (ECE) > Pollution Management (PM) |
| Depositing User: | Luke Kirwan |
| Date Deposited: | 07 Nov 2024 09:27 |
| Last Modified: | 07 Nov 2024 09:27 |
| URI: | https://pure.iiasa.ac.at/20099 |
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