氮氧化物
二氧化氮
环境科学
作物
农业
污染物
臭氧
气溶胶
氮氧化物
大气科学
农学
气象学
化学
生物
生态学
地理
燃烧
有机化学
工程类
地质学
废物管理
作者
David B. Lobell,Stefania Di Tommaso,Jennifer Burney
出处
期刊:Science Advances
[American Association for the Advancement of Science (AAAS)]
日期:2022-06-03
卷期号:8 (22)
被引量:10
标识
DOI:10.1126/sciadv.abm9909
摘要
Nitrogen oxides (NOx) are among the most widely emitted pollutants in the world, yet their impacts on agriculture remain poorly known. NOx can directly damage crop cells and indirectly affect growth by promoting ozone (O3) and aerosol formation. We use satellite measures of both crop greenness and NOx during 2018-2020 to evaluate crop impacts for five major agricultural regions. We find consistent negative associations between NO2 and greenness across regions and seasons. These effects are strongest in conditions where O3 formation is NOx limited but remain significant even in locations where this pathway is muted, suggesting a role for direct NOx damage. Using simple counterfactuals and leveraging published relationships between greenness and growth, we estimate that reducing NOx levels to the current fifth percentile in each region would raise yields by ~25% for winter crops in China, ~15% for summer crops in China, and up to 10% in other regions.
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