Integrating Drivers of Atlantic Productivity (IDAPro)

整合大西洋生产力驱动因素 (IDAPro)

• 批准号: NE/Y004531/1
• 负责人: Alessandro Tagliabue
• 金额: $ 28.41万
• 依托单位: University of Liverpool
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2023
• 资助国家: 英国
• 起止时间: 2023 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=NE%2FY004531%2F1
• 关键词: Integrating; Drivers; Atlantic; Productivity; IDAPro

The open ocean ecosystems which dominate the surface of our planet are all dependent on the generation of new organic matter by single celled organisms which are collectively termed phytoplankton. These organisms use light, nutrients and carbon dioxide to grow through a process termed primary production. In addition to forming the base of the marine food web, the collective primary production by these organisms is ultimately responsible for ocean biology keeping atmospheric carbon dioxide levels around 30-40% lower than they would otherwise be, thus exerting a significant impact on global climate. Understanding how primary production may vary in the future is thus important for predicting the ongoing response of both ocean ecosystems and carbon cycling to climate change. The abundance and activity of phytoplankton in the upper ocean is always a balance between growth rates (determined by the availability of resources) and loss rates including through grazing by organisms collectively termed zooplankton and mortality due to viruses and direct sinking. However, the factors determining both growth and loss dynamically vary both across the different regions of the ocean and throughout the annual cycle in complex and interacting ways. We currently try and capture the knowledge necessary to predict future changes in primary production using numerical models of these interacting processes. However, our current state-of-the-art models differ substantially in their predictions of future change due to the differing ways they represent a variety of these key processes.Focusing on an important region of the ocean for biological carbon storage, the mid-high latitude North Atlantic, our proposal aims to make exciting new year-round observations of primary production and the controlling factors using a combination of satellite, ship-based and novel robotic platforms. We will augment these observations with detailed experimental work undertaken at sea, alongside targeted numerical modelling, in order to generate an improved understanding of the balance between controls on growth and loss and, crucially, establish how this varies over the dynamic seasonal cycle. Data from our observations and experiments will allow us to establish key drivers of the magnitude and seasonal changes in primary production and link these to the overall controls on the efficiency of ocean carbon storage across a broad region of the North Atlantic Ocean. In addition to providing new understanding, our research will generate improved data sets of rates of growth and loss, providing more rigorous constraints for numerical models and hence pointing the way towards more confident predictions of future primary production and carbon cycle responses to climate change.

主导地球表面的开放海洋生态系统都取决于单细胞生物的产生新的有机物，这些生物被统称为浮游植物。这些生物使用光，养分和二氧化碳通过称为初级生产的过程生长。除了形成海洋食品网的基础外，这些生物的集体初级生产最终还导致海洋生物学保持大气二氧化碳水平比以前低约30-40％，从而对全球气候产生重大影响。因此，了解将来的主要产量可能会有所不同，这对于预测海洋生态系统和碳循环对气候变化的持续反应很重要。浮游植物在上海中的丰度和活动始终是增长率（由资源的可用性决定）和损失率之间的平衡，包括通过统治病毒引起的浮游生物和直接下沉的生物放牧。但是，决定生长和损失的因素在海洋的不同区域以及整个年度周期都以复杂和相互作用的方式动态变化。我们目前尝试使用这些相互作用过程的数值模型来捕获必要的知识，以预测主要生产的未来变化。但是，由于它们代表了各种关键过程的不同方式，我们当前的最新模型在对未来变化的预测中有很大差异。将其集中在海洋重要区域中，以用于生物碳存储（北大西洋北部最高纬度），我们的提议旨在使用卫星和船体式的机器人组合组合的主要生产和控制因素的新全年生产观察，并具有令人兴奋的全年观察。我们将通过在海上进行的详细实验工作以及针对性的数值建模来增强这些观察结果，以便对控制对生长和损失的控制之间的平衡有了深刻的了解，并且至关重要地确定这在动态季节性周期中如何变化。来自我们的观察结果和实验的数据将使我们能够建立主要生产大小和季节性变化的关键驱动力，并将其与北大西洋广阔地区海洋碳储存效率的总体控制联系起来。除了提供新的理解外，我们的研究还将产生改进的增长和损失速率数据集，为数值模型提供更严格的约束，从而为对未来的初级生产和碳循环对气候变化的反应的更加自信的预测指向。