Land Ocean Carbon Transfer (1-year extension)

陆地-海洋碳转移(LOCATE)方案在国家海洋和大洋委员会、CEH、PML和BGS之间建立了真正新的和高效的合作，以提供对横跨溪流、河流、河口以及进入沿海和全球海洋的陆源溶解有机物(TDOM)通量的新理解。这些通量共同代表了全球碳循环中一个重要的、不断变化的、但鲜为人知的组成部分。我们共同取得了以下重大进展：1)首次内部一致地将tDOM通量整合到GB河流的潮汐范围，表明高地针叶林增强了这种通量；2)对tDOM在温带河口水域的传输进行了最大规模的研究，强调了这种物质的组成和命运受到陆地人类活动的强烈影响；3)对整个北海tDOM的分布进行了最全面的评估，确定了从欧洲西北部和斯堪的纳维亚大陆出口的大部分tDOM必须在内部埋藏或重新矿化，这可能会对大气造成损失；4)开发了一个全新的模式--UniDOM，它统一了陆地-海洋水生连续体(LOAC)中tDOM周转的概念、状态变量和参数。我们在了解tDOM的通量和去向方面的进展使人们对水生生态系统中温室气体(温室气体；二氧化碳、CH4、N2O)的通量和控制这些通量的过程知之甚少。我们的主要利益相关者，包括BEIS和主要的水务公司，认识到这种缺乏了解的情况阻碍了国家温室气体排放报告和可持续土地和水资源管理政策的制定，以使英国政府能够在2050年实现温室气体净零排放。在我们以往成就的基础上，我们拟议的推广活动旨在：1)为GB LOAC制定温室气体预算，2)了解控制这些温室气体的生物和非生物过程，3)评估人类活动的影响。我们将通过一系列相互关联的目标来实现这些目标，这些目标结合了基于案头的综合和建模活动、对我们最初为期一年的GB规模实地方案的存档样本的分析、利用我们遗留下来的重点集水来建立一套基线观察以及利益攸关方的参与。我们将继续与我们各种区域、国家和国际利益攸关方合作，以确定这一新的理解可以在哪里以及如何在与碳封存和气候监管相关的政策和实践中取得有益的结果。

The Land Ocean Carbon Transfer (LOCATE) programme has established genuinely new and highly effective collaborations across NOC, CEH, PML and BGS to deliver new understanding of terrigenous dissolved organic matter (tDOM) fluxes across streams, rivers, estuaries and into coastal seas and the global ocean. These fluxes collectively represent a significant and changing, yet poorly understood, component of the global C cycle. Together, we have already achieved the following, major advances: 1) the first internally consistent integration of tDOM fluxes to the tidal extent of GB rivers, demonstrating that coniferous forestry in uplands enhances this flux; 2) the largest study of tDOM transport across temperate estuarine waters, highlighting that the composition and fate of this material is strongly influenced by human activities on land; 3) the most comprehensive assessment of the distribution of tDOM throughout the North Sea, identifying that the bulk of tDOM exported from the Northwest European and Scandinavian landmasses must be buried or remineralized internally, with potential losses to the atmosphere; 4) the development of a fundamentally new model, UniDOM, that unifies concepts, state variables and parameterisations of tDOM turnover across the land-ocean aquatic continuum (LOAC). Our developments in understanding the fluxes and fate of tDOM have brought into sharp focus how little is known about greenhouse gas (GHGs; CO2, CH4, N2O) fluxes and the processes that control these in aquatic ecosystems. Our key stakeholders, including BEIS and major water companies, recognise that this lack of understanding hinders national GHG emissions reporting and the development of sustainable land- and water management policies to enable the UK government to achieve net-zero GHG emissions by 2050. Building upon our previous achievements, our proposed extension activities aim to:1) develop a GHG budget for the GB LOAC, 2) understand the biotic and abiotic processes that control these, and 3) assess the influence of human activities. We will achieve these through a series of interconnected objectives that combine desk-based syntheses and modelling activities, analysis of archived samples from our original year-long GB-scale field programme, use of our legacy focal catchments to establish a suite of baseline observations, and stakeholder engagement. We will continue to work with our diverse range of regional, national and international stakeholders to identify where and how this new understanding can achieve beneficial outcomes for policies and practices relating to C sequestration and climate regulation.