中国森林的每月土壤呼吸:21年来时空模式和驱动因素
Jiaming Chang1,2, Ni Huang1, Li Wang1
1State Key Laboratory of Remote Sensing and Digital Earth, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing, China.
Global change biology
|January 19, 2026
概括
准确的森林土壤呼吸 (Rs) 对于减缓气候变化至关重要. 这项研究为中国提供了每月Rs数据集.
科学领域:
- 森林生态 森林生态
- 气候变化科学 气候变化科学
- 遥感 遥感 遥感 遥感
背景情况:
- 森林是关键的陆地碳汇,对减缓气候变化至关重要.
- 森林土壤呼吸 (Rs) 的精确量化,这是一个主要的二氧化碳排放,受到年度规模估计的阻碍,这些估计掩盖了微细规模的动态.
- 了解Rs驱动因素对于完善气候模型至关重要.
研究的目的:
- 为中国的森林开发一个高分辨率的每月土壤呼吸 (Rs) 数据集.
- 分析2000年至2020年间卢比的时空动态和趋势.
- 调查环境因素和森林特征对卢比的影响.
主要方法:
- 使用遥感和地理加权极端梯度增强模型开发了一个500米分辨率的月度Rs数据集.
- 验证了R2 = 0.74和RMSE = 0.8 g C m-2 day-1.8 的模型.
- 分析了Rs的趋势和与不同森林类型和年龄的总初级生产率 (GPP),温度和降水的关系.
主要成果:
- 从2000年到2020年,中国的森林平均释放了2.32 Pg C 1年,其中夏季的峰值为2.32 Pg C.
- 观察到每年和季节性Rs的显著上升趋势,特别是在中国南部的年轻森林和种植园.
- 总初级生产率 (GPP) 是年度卢比的主要驱动因素,而温度主导季节性卢比,降水效应各不相同.
结论:
- 每月规模的分析对于了解森林土壤呼吸动态至关重要.
- 森林管理和年龄显著调节Rs的变化和趋势.
- 调查结果强调,需要将细度的RS数据纳入气候变化缓解战略.
相关概念视频
The 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.
Global 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.
Threats to Biodiversity
There have been five major extinction events throughout geological history, resulting in the elimination of biodiversity, followed by a rebound of species that adapted to the new conditions. In the current geological epoch, the Holocene, there is a sixth extinction event in progress. This mass extinction has been attributed to human activities and is thus provisionally called the Anthropocene. In 2019 the human population reached 7.7 billion people and is projected to comprise 10 billion by...
The Soil Ecosystem
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:
Soil Microbial Ecology
Soil microbial ecology is defined by highly diverse, spatially structured communities that drive nutrient cycling, organic matter turnover, and overall ecosystem stability. Although a gram of soil can contain thousands of bacterial and archaeal taxa, the ecological processes they mediate are even more crucial for sustaining terrestrial life.Microhabitats and NichesSoil is a heterogeneous mixture of minerals, organic matter, water, and air. Microbes inhabit distinct microhabitats formed by...
Microbes and Climate Change
Microorganisms are pivotal agents in Earth's biogeochemical cycles, significantly influencing climate dynamics through their metabolic activities. These microbes modulate the levels of key greenhouse gases by both contributing to and helping mitigate climate change.Microbial Contributions to Greenhouse Gas EmissionsRising global temperatures accelerate microbial metabolism, which, in turn, speeds up the decomposition of organic matter. This process releases carbon dioxide (CO₂) through...


