生态系统的碳储存,考虑未来的环境和土地利用变化,以及发达地区实现碳中和的途径
Jingyi Liu1, Qianqian Yan1, Menghan Zhang2
1College of Forestry and Landscape Architecture, South China Agricultural University, No. 483 Wushan Road, Tianhe District, Guangzhou 510642, China.
The Science of the total environment
|August 11, 2023
概括
陆地生态系统的碳储存对政策至关重要. 保护亚热带森林和减少化石燃料的使用,是实现碳中和的关键,在广东等发达地区.
科学领域:
- 生态生态学 生态生态学
- 环境科学 环境科学
- 气候变化研究 气候变化研究
背景情况:
- 评估陆地生态系统的碳储存对于有效的土地管理和碳减排政策至关重要.
- 关于环境和土地利用因素对生态系统碳储存的影响的知识差距仍然存在,特别是在发达地区.
- 了解碳储存的时空变化对于实现碳中和目标至关重要.
研究的目的:
- 调查发达的亚热带和热带地区如何增强碳储存并实现碳中和.
- 将中国南方的广东省作为模拟未来土地管理场景的案例研究.
- 预测到2060年可允许的化石燃料消耗,以实现零净二氧化碳排放.
主要方法:
- 开发了三种土地管理场景 (2020-2060年) 使用补丁生成土地使用模拟模型.
- 使用生态系统净生产率 (NEP = NPP - HR) 估计的碳储存.
- 预测净初级生产率 (NPP) 通过人工神经网络和异质呼吸 (HR) 通过土壤呼吸模型.
主要成果:
- 广东的总碳储量预计在2060年将在70.6至74.8万之间.
- 碳储存和土地使用类型之间发现了非线性关系;地形,温度和土地使用配置影响空间时间碳储存变化.
- 保护亚热带森林和边缘比低地热带林业更有效地储存碳.
结论:
- 净零二氧化碳排放更多地取决于减排,而不是土地管理策略.
- 为了实现净零排放,必须在2060年之前将化石能源在总能源消耗中的比例从75.5%降至大约25%.
- 必须整合土地管理和减排战略,以实现碳中和目标.
相关概念视频
The Carbon Cycle
38.5K
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.
38.5K
Carbon-dioxide Fixation
40
Carbon dioxide fixation in prokaryotes enables the assimilation of inorganic carbon into organic molecules, supporting biosynthetic pathways, sustaining ecosystems, and contributing to the global carbon cycle. It also has industrial applications in carbon capture and bioproduct synthesis. Autotrophic organisms rely on this process to utilize CO₂ as a carbon source in diverse environments.The Calvin CycleThe Calvin cycle is the most widespread carbon fixation mechanism, primarily used by...
40
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
Global Climate Change
24.5K
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.
24.5K
The Nitrogen Cycle
52.8K
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...
52.8K
Bioremediation
19.0K
Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.
19.0K


