The Greenhouse Gas Removal by Enhanced Weathering (GGREW) project is a multi-institutional project funded by the NERC-led “Greenhouse Gas Removal from the Atmosphere” programme. The project brings together a multidisciplinary team from the University of Oxford, the University of Southampton, Cardiff University and the University of Cambridge to assess the potential and challenges of removing carbon dioxide from the atmosphere by enhanced weathering.

The project will explore the technological, environmental, economic and social feasibility of using silicate and carbonate materials as a source of cations to remove carbon dioxide from the atmosphere into carbonate minerals and ocean alkalinity. Five specific pieces of research will be undertaken:

  • Characterisation of available silicate and carbonate waste material, particularly from mining (quantity, location, mineralogy, geochemistry and grainsize)
  • Assessment of the rates of break-down of representative silicate waste material, inorganically, and through microbial acceleration
  • Assess mechanisms for engineering approaches to the acceleration of weathering of carbonates and silicates
  • Quantify the response of inorganic and biogenic carbonate production in the ocean to increased alkalinity, and the impact of related changes in chemical fluxes to the ocean
  • Assess the interaction of enhanced weathering processes with society

The knowledge gained from this research will be used to inform a life cycle assessment of enhanced weathering and an assessment of the potential scalability of such an approach.

The following people are involved in GGREW:

  • Prof Gideon Henderson (Department of Earth Sciences, University of Oxford)
  • Prof Ros Rickaby (Department of Earth Sciences, University of Oxford)
  • Prof Samar Khatiwala (Department of Earth Sciences, University of Oxford)
  • Prof Aidong Yang (Department of Engineering Sciences, University of Oxford)
  • Prof Richard Darton (Emeritus, Department of Engineering Sciences, University of Oxford)
  • Prof Steve Rayner (Institute for Science, Innovation and Society, University of Oxford)
  • Dr Javier Lezaun (Institute for Science, Innovation and Society, University of Oxford)
  • Dr Rob Bellamy (Institute for Science, Innovation and Society, University of Oxford)
  • Peter Healey (Institute for Science, Innovation and Society, University of Oxford)
  • Tim Kruger (Oxford Martin School, University of Oxford)
  • Prof Rachael James (Ocean and Earth Science, University of Southampton)
  • Prof Damon Teagle (Ocean and Earth Science, University of Southampton)
  • Dr Juerg Matter (Ocean and Earth Science, University of Southampton)
  • Dr Phyllis Lam (Ocean and Earth Science, University of Southampton)
  • Dr Phil Renforth (School of Earth and Ocean Sciences, Cardiff University)
  • Huw Pullin (School of Earth and Ocean Sciences, Cardiff University)
  • Sarah Gore (School of Earth and Ocean Sciences, Cardiff University)
  • Prof Simon Redfern (Department of Earth Sciences, University of Cambridge)
  • Dr Marion Louvel (Department of Earth Sciences, University of Cambridge)