全球净初级产量下降被气候模型低估
Thomas J Ryan-Keogh1, Alessandro Tagliabue2, Sandy J Thomalla1,3
1Southern Ocean Carbon-Climate Observatory, CSIR, Cape Town, South Africa.
概括
海洋净初级产量下降可能比预测更大,即使有了改进的气候模型. 目前的模型低估了海洋变暖对这一重要的生态系统服务的影响.
科学领域:
- 海洋生态海洋生态学
- 海洋学 海洋学 海洋学
- 气候变化科学 气候变化科学
背景情况:
- 海洋净初级生产对生态系统服务和碳循环至关重要.
- 对未来净初级生产变化的模型预测缺乏共识,阻碍了对气候影响的评估.
研究的目的:
- 通过使用当代遥感数据,评估和排名海洋净初级生产的气候模型预测.
- 确定当前模型中关于海洋变暖影响的缺陷.
主要方法:
- 从六个算法中利用遥感净初级生产趋势 (1998-2023年).
- 采用基于对海面温度,叶绿素-a和混合层深度的线性反应的模型排名方案.
- 将15个不同的模型预测与观测数据进行比较.
主要成果:
- 遥感数据表明,未来海洋净初级产量下降的可能性高于当前模型的预测.
- 性能最好的模型仍然低估了净初级产量下降对海洋变暖的敏感性.
- 现有的模型可能无法完全捕捉海面温度上升的放大影响.
结论:
- 未来海洋净初级产量下降可能超过目前的估计,影响生态系统服务.
- 为了准确的气候影响评估,需要提高对海洋变暖的模型灵敏度.
- 预测温度灵敏度的更高准确度可能会揭示未来净初级生产下降的更大幅度.
关键词:
海洋生物学 海洋生物学相关概念视频
What is Climate?
18.3K
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.
18.3K
Global Climate Change
24.2K
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.
24.2K
Primary Production
23.5K
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.
23.5K
Threats to Biodiversity
22.1K
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...
22.1K
Adaptations that Reduce Water Loss
25.1K
Though evaporation from plant leaves drives transpiration, it also results in loss of water. Because water is critical for photosynthetic reactions and other cellular processes, evolutionary pressures on plants in different environments have driven the acquisition of adaptations that reduce water loss.
25.1K
Conservation of Declining Populations
9.6K
Conservation of declining population focuses on ways of detecting, diagnosing, and halting a population decline. The approach uses methods to prevent populations from going extinct.
9.6K


