来自开放式生物质燃烧的全球排放量估计使用质量平衡方法
Yuzhe Shen1, Long Chen1,2, Danyu Wang1
1Key Laboratory of Geographic Information Science (Ministry of Education), School of Geographic Sciences, East China Normal University, Shanghai 200241, China.
Environmental science & technology
|February 3, 2026
概括
从开放式生物质燃烧 (OBB) 来产生的全球 (Hg) 排放量使用质量平衡模型进行了重新估计. 这项研究提供了一个更准确的评估Hg释放的植被组织和全世界的泥炭火灾.
科学领域:
- 环境科学 环境科学
- 大气化学 大气化学
- 生物地质化学生物地质化学
背景情况:
- 开放式生物质燃烧 (OBB) 的 (Hg) 排放是全球大气Hg循环的一个主要因素.
- 以前使用排放因子 (EF) 方法进行的估计存在重大不确定性.
- 对OBB的Hg来源的精细了解对于准确的全球Hg预算评估至关重要.
研究的目的:
- 开发和应用一个质量平衡模型,重新估计2010-2019年间OBB全球Hg排放量.
- 从单个植被组织中量化Hg排放,并区分燃烧来源 (植被,垃圾,泥炭地).
- 分析来自OBB的Hg排放的空间,时间和类别变异性.
主要方法:
- 开发一个质量平衡模型来估计Hg排放量.
- 从植物来源的燃烧,垃圾堆燃烧和泥炭地火灾中产生的气排放量的量化.
- 基于地理区域,生物群,植被类型和季节性的排放数据的分析.
主要成果:
- 来自OBB的全球年度Hg排放平均为280Mg/年-1 (范围:93803Mg/年-1).
- 主要的贡献包括植被来源的燃烧 (129 毫克年-1),垃圾 (81 毫克年-1),和泥炭火灾 (70 毫克年-1).
- 在非洲中部,印度-中国半岛和北亚地区确定了排放热点,叶子是最大的贡献者 (58%).
结论:
- 与EF方法相比,质量平衡模型提供了更准确,更细致的全球OBBHg排放的评估.
- 来自OBB的Hg排放显示出显著的空间异质性和明显的季节性模式.
- 了解这些排放源对于全球循环研究和政策制定至关重要.
相关概念视频
Global Climate Change
28.9K
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.
28.9K
Balancing Redox Equations
62.2K
Electrochemistry is the science involved in the interconversion of electrical and chemical reactions. Such reactions are called reduction-oxidation, or redox reactions. These important reactions are defined by changes in oxidation states for one or more reactant elements and include a subset of reactions involving the transfer of electrons between reactant species. Electrochemistry as a field has evolved to yield sufficient insights on the fundamental principles of redox chemistry and multiple...
62.2K
Emission Spectra
76.4K
When solids, liquids, or condensed gases are heated sufficiently, they radiate some of the excess energy as light. Photons produced in this manner have a range of energies, and thereby produce a continuous spectrum in which an unbroken series of wavelengths is present.
76.4K
Burn Injuries
4.4K
Burn injuries occur when the skin and underlying tissues are damaged due to exposure to heat, electricity, chemicals, radiation, or friction. They can vary in severity, from minor superficial burns to severe deep burns that can be life-threatening.
The damage results in the death of skin cells, which can lead to a massive loss of fluid. Dehydration, electrolyte imbalance, and renal and circulatory failure follow, which can be fatal. Burn patients are treated with intravenous fluids to offset...
The damage results in the death of skin cells, which can lead to a massive loss of fluid. Dehydration, electrolyte imbalance, and renal and circulatory failure follow, which can be fatal. Burn patients are treated with intravenous fluids to offset...
4.4K
What are Estimates?
8.8K
It isn't easy to measure a parameter such as the mean height or the mean weight of a population. So, we draw samples from the population and calculate the mean height or mean weight of the individuals in the sample. This sample data acts as a representative measure of the population parameter. These sample statistics are known as estimates.
The estimate for the mean of a sample is denoted by ͞x, whereas the mean of the population is designated as μ. Further, parameters such...
The estimate for the mean of a sample is denoted by ͞x, whereas the mean of the population is designated as μ. Further, parameters such...
8.8K
Equilibrium and Balance
6.6K
The inner ear assumes dual functionalities of auditory perception and equilibrium maintenance. The vestibule is the organ responsible for balance. This organ contains mechanoreceptors, specifically hair cells, endowed with stereocilia, which aid in deciphering information regarding the position and motion of our heads. Two intrinsic components, the utricle and saccule, help perceive head position, while the semicircular canals track head movement. Neurological messages initiated in the...
6.6K


