在中国 (2019-2021) 燃烧作物残留物:时空模式,环境影响和排放动态
Qiancheng Lv1, Zeyu Yang1, Ziyue Chen1
1Faculty of Geographical Science, Beijing Normal University, Beijing, 100875, China.
Environmental science and ecotechnology
|February 15, 2024
概括
中国的农作物残留物燃烧 (CRB) 显示向南转移,晚间活动集中. 夜间燃烧对空气质量产生重大影响,需要有针对性的污染控制策略.
科学领域:
- 环境科学 环境科学
- 大气科学 大气科学
- 遥感 遥感 遥感 遥感
背景情况:
- 农作物残留物燃烧 (CRB) 是中国空气污染的一个重要来源.
- 现有的火灾检测方法缺乏时间分辨率来分析日间CRB模式.
- 了解CRB的时空动态对于空气质量管理至关重要.
研究的目的:
- 调查2019-2021年中国CRB的日间时空模式和环境影响.
- 量化CRB每小时的排放量及其对区域空气质量的影响.
- 为监管CRB和相关污染事件提供见解.
主要方法:
- 使用NSMC-Himawari-8每小时的火灾产品进行CRB分析.
- 分析了CRB的时空分布,日间模式和季节性变化.
- 量化了CO,PM10和PM2.5的排放量以及对空气质量的评估影响.
主要成果:
- 观察到CRB中心向南转移,平均每年7.5°,东北方向性下降.
- 确定了17:00至20:00之间每天主要发生的CRB,夜间燃烧显著 (38.0-51.9%).
- 量化了总排放量,并揭示了CRB对区域空气质量的可变季节性滞后影响.
结论:
- CRB表现出明显的日间和时空模式,在夜间有显著的贡献.
- CRB对区域空气质量有明显的影响,因季节而异.
- 这些发现支持针对CRB控制和减轻相关污染的有针对性的干预措施.
相关概念视频
01:14The Carbon Cycle
Carbon is the basis of all organic matter on Earth, and is recycled through the ecosystem in two primary processes: one in which carbon is exchanged among living organisms, and one in which carbon is cycled over long periods of time through fossilized organic remains, weathering of rocks, and volcanic activity. Human activities, including increased agricultural practices and the burning of fossil fuels, has greatly affected the balance of the natural carbon cycle.
01:50Global Climate Change
Throughout its ~4.5 billion year history, the Earth has experienced periods of warming and cooling. However, the current drastic increase in global temperatures is well outside of the Earth’s cyclic norms, and evidence for human-caused global climate change is compelling. Paleoclimatology, the study of ancient climate conditions, provides ample evidence for human-caused global climate change by comparing recent conditions with those in the past.