Potential for large-scale CO2 removal via enhanced rock weathering with croplands

  title={Potential for large-scale CO2 removal via enhanced rock weathering with croplands},
  author={D. Beerling and E. Kantzas and M. Lomas and P. Wade and Rafael M. Eufrasio and P. Renforth and B. Sarkar and M. Andrews and R. James and C. Pearce and J. Mercure and H. Pollitt and P. Holden and N. Edwards and M. Khanna and L. Koh and S. Quegan and N. Pidgeon and I. Janssens and J. Hansen and S. Banwart},
  pages={242 - 248}
Enhanced silicate rock weathering (ERW), deployable with croplands, has potential use for atmospheric carbon dioxide (CO2) removal (CDR), which is now necessary to mitigate anthropogenic climate change1. ERW also has possible co-benefits for improved food and soil security, and reduced ocean acidification2–4. Here we use an integrated performance modelling approach to make an initial techno-economic assessment for 2050, quantifying how CDR potential and costs vary among nations in relation to… Expand
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A series of technological options are discussed to bring about change in agriculture for delivering food security and providing multiple routes to the removal of CO2 from the atmosphere, including the use of silicate amendment of soils to sequester atmospheric CO2 and agronomy technologies to increase soil organic carbon. Expand
Managed pathways for CO2 mineralisation: analogy with nature and potential contribution to CCUS-led reduction targets.
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Climate stabilization plans rely heavily on advanced bioenergy and bioproducts for substitution of fossil-based energy sources and materials, and increasingly, for negative emissions via the directExpand
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There is growing urgency for CO2 removal strategies to slow the increase of, and potentially lower, atmospheric CO2 concentrations. Enhanced weathering, whereby the natural reactions between CO2 andExpand
Anthropogenic CO2 of High Emission Scenario Compensated After 3500 Years of Ocean Alkalinization With an Annually Constant Dissolution of 5 Pg of Olivine
  • P. Köhler
  • Environmental Science
  • Frontiers in Climate
  • 2020
The CO2 removal model inter-comparison (CDRMIP) has been established to approximate the usefulness of climate mitigation by some well-defined negative emission technologies. I here analyze oceanExpand


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Farming with crops and rocks to address global climate, food and soil security
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Simulating carbon capture by enhanced weathering with croplands: an overview of key processes highlighting areas of future model development
The processes leading to soil acidification in croplands and how the soil weathering CO2 sink is represented in models are reviewed and it is argued for further integration of process knowledge in mathematical models to capture feedbacks affecting both longer-term CO2 consumption and crop growth and yields. Expand
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The chemical weathering of rocks currently absorbs about 1.1 Gt CO2 a−1 being mainly stored as bicarbonate in the ocean. An enhancement of this slow natural process could remove substantial amountsExpand
The potential of agricultural land management to contribute to lower global surface temperatures
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Enhanced weathering strategies for stabilizing climate and averting ocean acidification
The chemical breakdown of rocks can be enhanced by spreading silicate granules over land. Research suggests that this measure, which increases the rate at which CO2 is locked up in ocean carbonates,Expand
Carbon dioxide efficiency of terrestrial enhanced weathering.
The results show that the choice of source rocks and material comminution technique dominate the CO2 efficiency ofEnhanced weathering, and to control or reduce atmospheric CO2 concentrations substantially with enhanced weathering would require very large amounts of rock. Expand
Biomass-based negative emissions difficult to reconcile with planetary boundaries
Under the Paris Agreement, 195 nations have committed to holding the increase in the global average temperature to well below 2 °C above pre-industrial levels and to strive to limit the increase toExpand
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Land-management options for greenhouse gas removal (GGR) include afforestation or reforestation (AR), wetland restoration, soil carbon sequestration (SCS), biochar, terrestrial enhanced weatheringExpand
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Simulations of commonly proposed forest-management portfolios for Europe show that no single portfolio would meet all the requirements of the Paris Agreement, and climate benefits from forest management would be modest and local, rather than global. Expand