在1980-2019年期间,改善了东南亚农田的特定作物氧化物排放量
Geng Li1,2, Peng Xu3, Zhonghua Zheng4
1Division of Environment and Sustainability, the Hong Kong University of Science and Technology, Hong Kong 999077, China.
Environmental science & technology
|February 14, 2025
概括
东南亚受肥农田的氧化 (NOx) 排放量从1980年到2019年增加了四倍. 这项研究量化了这些增加,确定了热点,并为空气质量和粮食安全政策提供了信息.
科学领域:
- 环境科学 环境科学
- 大气化学 大气化学
- 农业科学 农业科学
背景情况:
- 氧化 (NOx) 是热层臭氧和细颗粒物形成的关键因素.
- 虽然燃烧源受到监管,但东南亚受肥农田的氧化物排放量越来越重要和不确定.
研究的目的:
- 从1980年到2019年量化东南亚受精作物土地的作物特定NOx排放的时空变化.
- 确定排放热点并为空气质量和粮食安全政策提供信息.
主要方法:
- 使用了一个自下而上的空间模型,整合了温度依赖性和Yienger和Levy (YL95) 方案.
- 在5弧分分辨率下分析了作物特定的受精作物耕地NOx排放量 (约. 10公里) 的距离.
主要成果:
- 从受肥农田产生的氧化物排放量增加了四倍,从1980年的12.9 Gg N yr−1增加到2019年的53.3 Gg N yr−1.
- 米,玉米和其他作物显示NOx排放趋势不断增加,而小麦保持稳定.
- 新估计比以前的估计低19%,印度尼西亚,越南,泰国,菲律宾和缅甸是热点地区.
结论:
- 开发了一份详细的,作物特定的,来自东南亚受精的农田的NOx排放量清单.
- 这些发现支持有针对性的减缓战略,以改善空气质量和粮食安全.
- 未来的研究应纳入气象数据,土壤特性和土地利用变化,以减少不确定性.
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