土壤的反应性排放加速夏季表面臭氧在中国北方平原增加
Wanshan Tan1,2,3, Haolin Wang1,2,3, Jiayin Su1,2,3
1School of Atmospheric Sciences, Sun Yat-sen University, and Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai, Guangdong 519082, People's Republic of China.
Environmental science & technology
|August 19, 2023
概括
中国的夏季臭氧因土壤反应性 (Nr) 排放而上升. 减少燃料燃烧排放间接促进土壤 Nr Nr 的增长.
科学领域:
- 大气化学 大气化学
- 环境科学 环境科学
- 气候变化研究 气候变化研究
背景情况:
- 自2013年以来,中国的夏季表面臭氧量有所增加.
- 尽管有政策减少燃料燃烧中的氧化物 (NOx) 排放,但这种增长仍在发生.
- 土壤反应性 (Nr) 排放,包括氧化 (NOx) 和酸 (HONO),都与此有关.
研究的目的:
- 调查土壤反应性 (Nr) 排放在2013-2019年北中国平原 (NCP) 上观察到的臭氧增加中的作用.
- 量化土壤Nr排放对夏季臭氧水平的贡献.
- 了解臭氧前体的人类和生物源之间的相互作用.
主要方法:
- 用GEOS-Chem化学运输模型进行模拟.
- 更新的土壤NOx排放量和纳入的土壤HONO排放量,基于受观察限制的方案.
- 分析模型输出,以评估臭氧增强和生产制度.
主要成果:
- 土壤Nr排放导致2019年6月至7月期间,日均最大8小时平均水平 (MDA8) 的臭氧增强,比NCP高8.0ppbv,比中国高5.5ppbv.
- 土壤Nr排放在2013-2019年间加速了6月至7月的臭氧增加,超过了NCP的3.0ppbv.
- 土壤Nr的臭氧贡献增加是由燃料燃烧NOx排放的同时减少所驱动的,将臭氧生产转移到一个更敏感的NOx制度.
结论:
- 土壤反应性 (Nr) 排放在夏季北中国平原臭氧增加中起着至关重要的作用.
- 减少人为的氧化排放间接地增加了土壤中臭氧的产生.
- 在NCP中,有效的臭氧减排策略必须考虑人为和生物源排放源之间的复杂相互作用.
更多相关视频
09:03Assessment of Methane and Nitrous Oxide Fluxes from Paddy Field by Means of Static Closed Chambers Maintaining Plants Within Headspace
Published on: September 6, 2018
12.3K
07:14Automated, High-resolution Mobile Collection System for the Nitrogen Isotopic Analysis of NOx
Published on: December 20, 2016
11.7K
相关概念视频
Overview of Nitrogen Metabolism
8.1K
Nitrogen is a very important element for life because it is a major constituent of proteins and nucleic acids. It is a macronutrient, and in nature, it is recycled from organic compounds and stored in the form of ammonia, ammonium ions, nitrate, nitrite, or nitrogen gas by many metabolic processes. Many of these metabolic processes are carried out only by prokaryotes.
The largest pool of nitrogen available in the terrestrial ecosystem is gaseous nitrogen (N2) from the air, but this...
The largest pool of nitrogen available in the terrestrial ecosystem is gaseous nitrogen (N2) from the air, but this...
8.1K
The Soil Ecosystem
20.4K
Plants obtain inorganic minerals and water from the soil, which acts as a natural medium for land plants. The composition and quality of soil depend not only on the chemical constituents but also on the presence of living organisms. In general, soils contain three major components:
20.4K
The Nitrogen Cycle
52.7K
Nitrogen atoms, present in all proteins and DNA, are recycled between abiotic and biotic components of the ecosystem. However, the primary form of nitrogen on Earth is nitrogen gas, which cannot be used by most animals and plants. Thus, nitrogen gas must first be converted into a usable form by nitrogen-fixing bacteria before it can be cycled through other living organisms. The use of nitrogen-containing fertilizers and animal waste products in human agriculture has greatly influenced the...
52.7K
The Sulfur Cycle
44.9K
Sulfur, an important element in the chemical makeup of proteins, is recycled through the atmosphere and aquatic and terrestrial environments. Found in the atmosphere as sulfur dioxide (SO2), sulfur is released by decaying organisms, weathered rocks, geothermal vents, volcanos, and burning fossil fuels. It is deposited into the ecosystem, cycled through the biotic community, and either released back into the atmosphere as gas or deposited in marine sediment for long-term storage and eventual...
44.9K
Inorganic Nitrogen Assimilation
44
Nitrogen is an essential element in biological systems, forming a crucial component of proteins, nucleic acids, and other cellular constituents. Many bacteria and archaea acquire nitrogen in the form of nitrate (NO₃⁻) or ammonia (NH₃), which are then assimilated into biomolecules through specific enzymatic pathways.Assimilatory Nitrate ReductionWhen nitrate enters the cell, it undergoes a two-step reduction process known as assimilatory nitrate reduction. Initially, the enzyme...
44
