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

苏格兰深水碳资源：来源、速率和命运：来源：储存在海洋沉积物中的碳来自哪里，其中有多大比例是海洋的，多大比例是陆地的？利率：海洋沉积物中储存了多少碳？命运：是什么过程决定了海洋沉积碳在陆架沉积物中的分布？哪些过程决定了碳跨越大陆架并进入深水海洋沉积物的运输？研究区域：苏格兰西海岸，赫布里底大陆架该项目将包括物理样本收集和分析，以及各种来源的数据整理和粒子跟踪建模。在样品收集方面，这将侧重于扩大目前对海洋沉积物中碳分布的空间了解，这些分布比目前大多数采样工作集中在更远的海域。除了帮助绘制沉积物类型和大陆架上碳含量的地图外，样品中的同位素和生物标记物分析还将有助于建立对沉积物中碳来源的了解。由于碳来自陆地来源，如泥炭地，这可能是陆地碳储量碳预算的重要投入。此外，陆地碳的老化可以帮助理解，由于气候变化可能从陆地上的存储中释放出来的老化碳是否有助于拓宽目前对陆地和海洋之间联系的理解，以及陆地存储中碳损失的威胁有多大。对于建模部分，计划的办法是使用水动力模型(即FVCOM或苏格兰陆架模型)的输出跟踪颗粒，并评估从海岸点源释放的颗粒在哪里沉积，以及哪些物理过程影响海床上的分布。

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.