由气候变化和肥料变化带来的土壤酸排放量增加加剧了全球臭氧污染
Yanan Wang1, Qinyi Li1,2, Yurun Wang1
1Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong, China.
Nature communications
|March 13, 2025
概括
全球土壤酸 (HONO) 排放量由于气候变化和肥料使用而增加. 这些排放对空气质量和植被产生影响,需要将它们纳入污染减缓战略.
科学领域:
- 大气化学 大气化学
- 环境科学 环境科学
- 土壤科学 土壤科学
背景情况:
- 土壤微生物酸 (HONO) 是大气反应性的重要来源,影响空气质量和气候.
- 量化长期全球土壤HONO排放,特别是在气候变化和肥料使用增加的情况下,仍然是一个挑战.
研究的目的:
- 在过去的四十年中,为了获得全球土壤HONO排放量.
- 评估这些排放对大气臭氧 (O3) 和植被的影响.
主要方法:
- 分析历史数据,得出1980年至2016年全球土壤HONO排放量.
- 使用化学气候模型模拟来评估土壤HONO对O3和植被的影响.
主要成果:
- 全球土壤HONO排放量从1980年的9.4万亿升至2016年的11.5万亿,主要是由于气候变化和肥料使用.
- 模拟表明,土壤HONO排放使全球表面O3增加了2.5% (高达29%) 并增加了植物对O3的风险,特别是在人为排放低的地区.
- 土壤HONO对空气质量和植被的影响预计将随着人为排放减少而增加.
结论:
- 土壤HONO排放是空气质量和气候动态的一个关键因素,但经常被忽视.
- 土壤HONO排放的影响越来越大,这凸显了需要将它们纳入全球污染减缓战略的必要性.
- 未来的空气质量管理计划应考虑到土壤衍生的HONO的不断增长的贡献,特别是在工业污染下降的地区.
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