Land Ocean Carbon Transfer (1-year extension)

Lead Research Organisation: British Geological Survey
Department Name: Groundwater

Abstract

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.

Publications

10 25 50
 
Description The GB annual flux from land to the near shore environment of Dissolved organic Carbon (DOC), dissolved inorganic carbon, particulate carbon and other elements has been estimated for the first time using a consistent and representative data set. We have characterized the transport and processing of DOC within estuaries and looked at the controls from catchment characteristics such as landuse, geology and rainfall on DOC export across GB. We have looked at the fluorescence component of DOC across the GB and also within selected case studies from tropical regions. The team has worked together to produce a model to predict the fate of terrestrial DOC in oceans and evaluated this using GB data.
Exploitation Route The LOCATE project findings have been taken forward in two large research grants AgZero+ and LTLS-FE, both funded by NERC focussed on the impact of human activity on water quality across the UK.
Sectors Agriculture

Food and Drink

Chemicals

Environment

URL https://www.locate.ac.uk/
 
Title Monthly measurements of major and trace elements in 41 rivers in Great Britain, 2017, from the LOCATE project 
Description Monthly measurements of major and trace elements in 41 rivers in Great Britain, 2017, from the LOCATE project 
Type Of Material Database/Collection of data 
Year Produced 2024 
Provided To Others? Yes  
Impact Related papers are being written up at the moment. This is a comprehensive dataset of major and trace elements in 41 GB rivers collected and analysed in a consistent way. The dataset will be available to the international research community. 
URL https://doi.org/10.5285/ef880531-08b3-477d-a69e-3b28beb562d2