热带水 - 年间二氧化碳增长率越来越负
Laibao Liu1, Philippe Ciais2, Mengxi Wu3
1Institute for Atmospheric and Climate Science, ETH Zurich, Zurich, Switzerland. laibao.liu@env.ethz.ch.
Nature
|May 31, 2023
概括
不仅仅是温度,热带水资源也越来越多地控制着地球的碳循环. 这种转变影响了二氧化碳的去除和气候反预测,模型未能捕捉到这种加剧的水碳合.
科学领域:
- 地球系统科学
- 气候科学
- 生态学
背景情况:
- 陆地生态系统吸收大量人为二氧化碳排放.
- 由于碳气候反的不确定性,在气候变化下预测未来的土地碳汇行为具有挑战性.
- 大气二氧化碳增长率 (CGR) 的年间变化为陆地-大气碳流提供了洞察力,特别是在热带地区.
研究的目的:
- 调查热带气候条件和CGR之间的年际关系.
- 评估水的可用性与温度对CGR可变性的影响.
- 评估地球系统和陆地表面模型在模拟这些关系方面的表现.
主要方法:
- 全球大气二氧化碳数据的分析.
- 使用了陆地储水和降水记录.
- 将1960年至1989年和1989年至2018年之间的关系进行比较,以确定气候变化下的变化.
主要成果:
- 与1960-1989年相比,1989-2018年热带水供应与CGR之间的联系变得更加强大和负面.
- 这种加剧的合可能源于与厄尔尼诺/南方振荡转移相关的热带水供应模式的改变.
- 大多数先进的气候模型都无法准确地复制观察到的水碳合的强化.
结论:
- 热带水的可用性正在成为陆地碳循环年间变化的主要因素.
- 这些发现突出了热带陆地碳气候反的关键调节.
- 目前的模型需要改进以捕捉水,碳和气候之间的动态相互作用.
更多相关视频
05:58Author Spotlight: Advancing Coral Culture - Creating a Semi-Quantitatively Controlled Microenvironment System to Counter Current Limitations
Published on: July 21, 2023
2.1K
07:32Monitoring Pedogenic Inorganic Carbon Accumulation Due to Weathering of Amended Silicate Minerals in Agricultural Soils.
Published on: June 4, 2021
5.2K
相关概念视频
01:50Global Climate Change
24.6K
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.
24.6K
01:14The Carbon Cycle
38.7K
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.
38.7K
01:28Carbon-dioxide Fixation
43
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...
43
01:06Primary Production
23.7K
The total amount of energy acquired by primary producers in an ecosystem is called gross primary production (GPP). However, of this energy, producers use some for metabolic processes, and some is lost as heat, decreasing the amount of energy available to the next trophic level. The remaining usable amount of energy is called the net primary productivity (NPP). In terrestrial ecosystems, NPP is driven by climate, while light penetration and nutrient availability drive NPP in aquatic ecosystems.
23.7K
01:27Microbial Growth Measurement: Indirect Methods
86
Estimating microbial growth is essential for understanding population dynamics and environmental adaptations. Indirect methods provide valuable insights by measuring parameters such as turbidity, metabolic activity, and biomass, enabling efficient and reproducible assessments.During exponential growth, microbial cells scatter light proportionally to their biomass, a principle used in turbidity measurements. About one million cells per milliliter produce detectable scattering, which a...
86
01:24Carbonation Shrinkage
178
Atmospheric CO2 penetrates the concrete's pores and, in the presence of moisture, forms carbonic acid, which then reacts with calcium hydroxide in the hydrated cement, forming calcium carbonate. This process reduces the concrete's volume and is termed carbonation shrinkage.
The concrete's permeability is slightly reduced as calcium carbonate produced during the reaction fills its pores. Furthermore, its strength is slightly enhanced as the water released during the reaction...
The concrete's permeability is slightly reduced as calcium carbonate produced during the reaction fills its pores. Furthermore, its strength is slightly enhanced as the water released during the reaction...
178