揭示了土壤甲沉没对2020年大气甲度的影响
Xiaoqi Zhou1, Wensheng Xiao1, Li Cheng1
1Zhejiang Tiantong Forest Ecosystem National Observation and Research Station, School of Ecological and Environmental Sciences, East China Normal University, Shanghai, China.
Global change biology
|June 26, 2024
概括
尽管2020年人为甲排放量较低,但大气中的甲增加. 全球温暖的土壤增强了土壤甲沉积,部分抵消了这种上升.
科学领域:
- 环境科学 环境科学
- 大气化学 大气化学
- 生态生态学 生态生态学
背景情况:
- 人为甲 (CH4) 排放量在2020年因COVID-19政策而下降.
- 大气中的CH4度意外上升,归因于湿地和减少的水槽.
- 土壤CH4沉在这种异常中的作用以前未被定量.
研究的目的:
- 为了量化2019年至2020年间陆地生态系统土壤CH4沉没的变化.
- 评估土壤CH4沉降变化对大气CH4动态的贡献.
- 了解环境因素,如土壤温度,对CH4沉降池的影响.
主要方法:
- 采用基于过程的生物地球化学模型.
- 集成多个数据集用于模型校准和验证.
- 量化全球土壤CH4沉没在陆地生态系统层面的变化.
主要成果:
- 与2019年相比,2020年全球土壤CH4沉降量显著增加 (0.35 ± 0.06 Tg).
- 这种增强的沉降主要归因于北方高度地区的土壤温度升高.
- 证明土壤的CH4下沉是大气CH4预算的关键组成部分.
结论:
- 土壤CH4下沉的变化对于准确评估大气CH4预算至关重要.
- 温暖的土壤温度可以增强陆地CH4沉降,可能减轻大气CH4度的增长.
- 忽视土壤的CH4沉降器导致低估排放增加和沉降器容量减少.
更多相关视频
相关概念视频
The Carbon Cycle
37.2K
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.
37.2K
The Sulfur Cycle
44.0K
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...
44.0K
The Soil Ecosystem
19.7K
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:
19.7K
What is Climate?
18.4K
Climate refers to the prevailing weather conditions in a specific area over an extended period. As the saying goes, “Climate is what you expect. Weather is what you get.” Climate is influenced by geographic factors, such as latitude, terrain, and proximity to bodies of water.
18.4K


