BIOLOGICAL CARBON PUMP ASSESSMENT USING THE TRANSPORT MATRIX METHOD AND GLOBAL NUTRIENT DISTRIBUTIONS (BATMAN)

使用传输矩阵方法和全局营养分布进行生物碳泵评估 (BATMAN)

• 批准号: NE/K015613/1
• 负责人: Adrian Martin
• 金额: $ 50.17万
• 依托单位: NATIONAL OCEANOGRAPHY CENTRE
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2013
• 资助国家: 英国
• 起止时间: 2013 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=NE%2FK015613%2F1
• 关键词: BIOLOGICAL; CARBON; PUMP; ASSESSMENT; USING

Marine life plays a key role in the Earth's climate. To grow, marine algae extract almost as much carbon dioxide from the atmosphere annually as all plants on land. This 'primary production' fuels the marine ecosystem. The resulting waste sinks, as 'export', sequestering large amounts of carbon at depth, away from the atmosphere. Atmospheric carbon dioxide levels can be very sensitive to small changes in the depth at which recycling (or 'remineralisation') of this waste back into nutrients takes place. We have sufficient observations of sinking material to investigate the process of remineralisation but far from enough to produce a global map that could be used to test climate models. We do have such maps for nutrient distributions, that are the consequence of the remineralisation, but traditionally models take too long to run to allow such comparisons. A new technique (the Transport Matrix method) provides a means of running models much faster. In tandem with this technical development, the mechanisms controlling the process of export have become much better understood in recent years. It is timely therefore to unite these recent advances to ensure that climate models accurately capture this key process of the Earth system.

海洋生物在地球气候中起着关键作用。为了生长，海藻每年从大气中吸收的二氧化碳几乎与陆地上的所有植物一样多。这种“初级生产”为海洋生态系统提供燃料。由此产生的废物下沉，作为“出口”，将大量的碳封存在远离大气的深处。大气中的二氧化碳水平对这种废物再循环（或“再矿化”）为营养物质的深度的微小变化非常敏感。我们有足够的下沉物质的观测来研究地球的再矿化过程，但还远远不足以制作一张可用于测试气候模型的全球地图。我们确实有这样的营养分布图，这是非均衡化的结果，但传统的模型需要太长的时间来运行，以允许这样的比较。一种新的技术（传输矩阵方法）提供了一种更快地运行模型的方法。随着这一技术的发展，近年来人们对控制出口过程的机制有了更好的了解。因此，现在是时候将这些最新进展结合起来，以确保气候模型准确地捕捉地球系统的这一关键过程。

项目成果

Air-sea disequilibrium enhances ocean carbon storage during glacial periods

• DOI: 10.1126/sciadv.aaw4981
• 发表时间: 2019-06-01
• 期刊: SCIENCE ADVANCES
• 影响因子: 13.6
• 作者: Khatiwala, S.;Schmittner, A.;Muglia, J.
• 通讯作者: Muglia, J.