Exploring global changes in agricultural ammonia emissions and their contribution to nitrogen deposition since 1980

作者：Lei Liu, Wen Xu, X. L. Lu, Buqing Zhong, Yixin Guo, Xiao Lu, Yuanhong Zhao, Wei He, Songhan Wang, Xiuying Zhang, Xuejun Liu, Peter M. Vitousek · 发表于：Proceedings of the National Academy of Sciences · 年份：2022 · DOI：10.1073/pnas.2121998119 · 被引用次数：338 · 研究领域：Atmospheric chemistry and aerosols、Vehicle emissions and performance、Soil and Water Nutrient Dynamics

SignificanceAgricultural systems are already major forces of ammonia pollution and environmental degradation. How agricultural ammonia emissions affect the spatio-temporal patterns of nitrogen deposition and where to target future mitigation efforts, remains poorly understood. We develop a substantially complete and coherent agricultural ammonia emissions dataset in nearly recent four decades, and evaluate the relative role of reduced nitrogen in total nitrogen deposition in a spatially explicit way. Global reduced nitrogen deposition has grown rapidly, and will occupy a greater dominant position in total nitrogen deposition without future ammonia regulations. Recognition of agricultural ammonia emissions on nitrogen deposition is critical to formulate effective policies to address ammonia related environmental challenges and protect ecosystems from excessive nitrogen inputs.