Scotland's Deep Water Carbon Resources: Sources, Rates and Fates

苏格兰的深水碳资源：来源、速率和命运：来源：储存在海洋沉积物中的碳来自何处，其中海洋占多大比例，陆地占多大比例？速率：海洋沉积物中储存了多少碳？命运：决定陆架沉积物中海洋沉积碳分布的过程是什么？什么过程决定了碳穿过大陆架进入深水海洋沉积物的迁移？研究区域：该项目将包括物理样品收集和分析，以及各种来源的数据整理和粒子跟踪建模。在样本收集方面，这将侧重于扩大目前对海洋沉积物中碳分布的空间认识，使其远离目前大多数取样工作的重点。除了协助对大陆架上沉积物类型和碳含量的绘图工作外，样品中的同位素和生物标志物分析将有助于加深对沉积物中碳来源的了解。由于碳来自泥炭地等陆地来源，这可能是陆地碳储存碳预算的重要投入。此外，陆地碳的老化可以帮助了解由于气候变化可能从陆地储存中释放的老化碳是否有助于扩大目前对陆地和海洋之间联系的理解，以及陆地储存中碳损失的威胁有多大。就建模部分而言，计划采用的方法是利用流体动力学模型，即FVCOM或苏格兰大陆架模型的输出来跟踪粒子，并评估从海岸点源（例如，海洋洛赫源头）释放的粒子沉积在何处，以及哪些物理过程影响了海底的分布。

Scotland's Deep Water Carbon Resources: Sources, Rates and Fates: Sources: Where does the carbon stored in marine sediments originate, what proportion of this is marine, what proportion is terrestrial? Rates: how much carbon is stored in marine sediments? Fates: what are the processes that determine distribution of marine sedimentary carbon in shelf sediments? What processes determine transport of carbon across the shelf and into deep water marine sediments? Study area: West coast of Scotland, Hebridean shelfThe project will include physical sample collection and analysis, as well as data collation from various sources and particle tracking modelling. In terms of sample collection, this will focus on expanding the current spatial understanding of distribution of carbon in marine sediments further offshore than most of the sampling effort is currently focused in. In addition to aiding mapping efforts of sediment types and carbon content on the shelf, isotope and biomarker analysis within samples will help build up an understanding of the sources of carbon within the sediment. With carbon originating from terrestrial sources, such as peatland, this could be an important input into carbon budgeting for terrestrial carbon stocks. Furthermore, aging of the terrestrial carbon can help understand whether aged carbon that may be released from stores on land due to climate change can help broaden the current understanding of links between land and sea and how big the threat from loss of carbon in terrestrial stores is. For the modelling component, the planned approach is to track particles using output of a hydrodynamic model, namely FVCOM or the Scottish Shelf Model, and assess where particles released from a point source at the coast, e.g. at the head of a sea loch, are deposited and what physical processes influence the distribution on the seabed.