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The role of post UK-LGM erosion processes in the long-term storage of buried organic C across Great Britain – A ‘first order' assessment
Earth-Science Reviews ( IF 10.8 ) Pub Date : 2022-07-14 , DOI: 10.1016/j.earscirev.2022.104126
A.M. Tye , D.L. Evans , J.R. Lee , D.A. Robinson

Increasing consideration is being given as to whether and how the subsoil can be utilised as a resource to store greater quantities of organic carbon through a range of ‘frontier' technologies. However, recent work suggests ‘priming’ effects may occur when fresh soil organic carbon (SOC) is mixed with older organic carbon (OC). Combined with increasing intensity of land use and perturbation of the surface environment there is potential for buried organic carbon (OC) to be re-incorporated into the active global C cycle. Therefore, understanding the nature of existing buried organic carbon (OC) within Soil Parent Material (SPM) and landscapes is increasingly important. A major OC burial route within landscapes is via erosion and deposition processes. This paper aims to provide a ‘first order' overview of the role erosion processes have made since the UK Last Glacial Maximum (UK-LGM) in the burial of OC in Great Britain. Using collated information, Monte-Carlo simulations were used to produce ‘first-order' estimates of the mass of OC buried within three deposit types; Devensian Till, Devensian Glacio-fluvial deposits and Holocene Alluvium. Combined median estimates for these three deposit types alone suggest, that 385 MT of OC has been buried in these deposits across Great Britain, demonstrating the importance of post UK-LGM erosion processes in long-term sequestration of OC. The paper provides a basis of a framework to describe where buried OC may be found within UK SPM and landscapes, whilst identifying gaps in our knowledge base. Whilst focusing on Great Britain, the processes are relevant to many countries, each of which will have experienced erosion processes unique to their own history of geology, geomorphology and climate.



中文翻译:

UK-LGM 后侵蚀过程在英国埋藏有机碳长期储存中的作用——“一阶”评估

人们越来越多地考虑是否以及如何将底土用作一种资源,通过一系列“前沿”技术储存更多的有机碳。然而,最近的研究表明,当新鲜土壤有机碳 (SOC) 与旧有机碳 (OC) 混合时,可能会出现“启动”效应。结合土地利用强度的增加和地表环境的扰动,埋藏的有机碳 (OC) 有可能重新纳入活跃的全球 C 循环。因此,了解土壤母质 (SPM) 和景观中现有埋藏有机碳 (OC) 的性质变得越来越重要。景观内的主要 OC 埋葬路线是通过侵蚀和沉积过程。本文旨在提供“第一顺序” 概述自英国末次盛冰期 (UK-LGM) 在英国埋葬 OC 以来侵蚀过程所起的作用。使用整理的信息,蒙特卡洛模拟被用来产生埋在三种矿床类型中的有机碳质量的“一阶”估计;Devensian Till、Devensian 冰川河流沉积物和全新世冲积层。仅这三种矿床类型的综合中值估计表明,英国各地的这些矿床中埋藏了 385 公吨 OC,这表明 UK-LGM 后侵蚀过程在长期封存 OC 中的重要性。该论文提供了一个框架基础,以描述在英国 SPM 和景观中可能发现埋藏 OC 的位置,同时确定我们知识库中的差距。虽然专注于英国,但这些过程与许多国家相关,

更新日期:2022-07-14
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