Land Ocean Carbon Transfer (1-year extension)

陆地海洋碳转移（LOCATE）计划在NOC，CEH，PML和BGS之间建立了真正新的高效合作，以提供对河流，河流，河口以及沿海海洋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一个重要的和不断变化的，但知之甚少，全球碳循环的组成部分。总之，我们已经取得了以下主要进展：1）第一次内部一致的整合tDOM通量的潮汐范围的GB河流，表明在高地针叶林增强这种流量; 2）最大的研究tDOM运输跨越温带河口沃茨，强调这种材料的组成和命运的强烈影响的人类活动在陆地上; 3）对整个北海的tDOM分布进行了最全面的评估，确定了从西北欧和斯堪的纳维亚大陆输出的大部分tDOM必须被掩埋或内部化，可能会损失到大气中; 4）开发一个全新的模型，统一概念的UniDOM，状态变量和参数化的tDOM营业额在陆地-海洋水生连续体（LOAC）。我们在了解tDOM的通量和命运的发展带来了尖锐的焦点是如何鲜为人知的温室气体（CO2，CH 4，N2 O）通量和控制这些在水生生态系统的过程。我们的主要利益相关者，包括BEIS和主要水务公司，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，使英国政府能够在2050年前实现温室气体净零排放。在我们以前的成就的基础上，我们建议的推广活动旨在：1）为GB LOAC制定温室气体预算，2）了解控制这些的生物和非生物过程，以及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，这些目标结合了联合收割机基于桌面的综合和建模活动，分析我们最初长达一年的GB级实地项目的存档样本，使用我们的传统重点流域来建立一套基线观测，以及利益相关者的参与。我们将继续与区域、国家和国际利益相关者合作，确定这种新的理解在何处以及如何能够为碳固存和气候调节相关的政策和实践带来有益的结果。

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.