相关实验视频
Updated: Jun 15, 2025

06:10
Using Generative Art to Convey Past and Future Climate Transitions
Published on: March 31, 2023
913
对过去和未来的全球初级生产率总值的新出现的约束
Xin Chen1, Tiexi Chen1,2,3, Yi Y Liu4
1School of Geographical Sciences, Nanjing University of Information Science and Technology, Nanjing, China.
Global change biology
|August 27, 2024
概括
本研究通过使用新兴约束方法来改进全球初级生产率 (GPP) 估计. 改进的GPP数据有助于在各种气候场景下预测未来的碳捕获.
科学领域:
- 地球系统科学 地球系统科学
- 生态生态学 生态生态学
- 气候科学 气候科学
背景情况:
- 陆地总初级生产率 (GPP) 是全球碳循环的关键组成部分,影响碳捕获.
- 现有的基于遥感 (RS-GPP) 的全球GPP估计表现出显著的不确定性.
研究的目的:
- 减少过去和未来全球GPP估计中的不确定性.
- 提高陆地碳捕获评估的准确性.
主要方法:
- 采用一种创新的新兴约束方法.
- 利用基于地面的流量塔GPP数据作为基于遥感的GPP数据集 (RS-GPP) 的观察约束.
- 通过使用独立的基于空间和时间的约束来验证全球GPP估计.
主要成果:
- 预计2001-2014年的全球GPP为126.8 ± 6.4 PgC年−1,与原来的RS-GPP整体平均值 (120.9 ± 10.6 PgC年−1) 相比,不确定性减少了39.6%.
- 根据各种共享社会经济路径 (SSP) 场景,预计未来的全球GPP,估计从140.6 ± 9.3 PgC年−1 (SSP126) 到194.1 ± 23.2 PgC年−1 (SSP585) 为2081-2100.
结论:
- 新兴约束方法显著提高了全球GPP估计的可靠性.
- 准确的GPP预测对于为了解气候变化,政策制定和碳减排战略提供信息至关重要.
相关概念视频
Primary Production
23.6K
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.
23.6K
Global Climate Change
24.3K
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.
24.3K
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
Threats to Biodiversity
22.2K
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...
22.2K
The Calvin Benson Cycle
4.5K
Ribulose 1,5- bisphosphate carboxylase/oxygenase (RuBisCo) is a critical enzyme that catalyzes carbon dioxide assimilation during photosynthesis. However, it is an inefficient enzyme, having an extremely slow catalytic rate. A typical enzyme can process about a thousand molecules per second; however, RuBisCo fixes only around three-carbon dioxides per second. Photosynthetic cells compensate for this slow rate by synthesizing very high amounts of RuBisCo, making it the most abundant single...
4.5K
Ecological Succession
17.2K
Ecological succession is influenced by the processes of facilitation, inhibition, and toleration. Facilitation occurs when early successional species create more favorable ecological conditions for subsequent species, such as enhanced nutrient, water, or light availability. In contrast, inhibition happens when early successional species create unfavorable ecological conditions for potential successive species, such as limiting resource availability. In some cases, later successional species...
17.2K

