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Agricultural greenhouse gas emissions and removals – potentials and contribution to global climate change mitigation

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John Recha (CGIAR-CCAFS/ILRI)

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Agricultural greenhouse gas emissions and removals – potentials and contribution to global climate change mitigation

  1. 1. « 4 per 1000 » Africa Symposium Johannesburg, 24-26th October 2018 With the support of Agricultural greenhouse gas (GHG) emissions and removals– potentials and contribution to global climate change mitigation by John Recha CCAFS-CGIAR With the support ofNAME1
  2. 2. « 4 per 1000 » Africa Symposium Johannesburg, 24-26th October 2018 With the support of -Crop yields are the lowest in SSA than any region in the world -Land degradation and loss of soil fertility are recognized as among the most important crop production constraints in SSA -Soil and land degradation, crop yield gaps and food and nutrition security are closely linked With the support ofNAME2 FAO
  3. 3. « 4 per 1000 » Africa Symposium Johannesburg, 24-26th October 2018 With the support ofWith the support ofNAME3 • Historical trends in Africa show 1.3°C increase • > 2° C by mid-century • 3 - 6° C by the end of the century
  4. 4. « 4 per 1000 » Africa Symposium Johannesburg, 24-26th October 2018 With the support of COP21, Paris 2015: “keep global warming well below 2°C, and pursuing efforts to limit the temperature increase to 1.5°C” Large scale sequestration in the agriculture, forestry, and land use sector
  5. 5. « 4 per 1000 » Africa Symposium Johannesburg, 24-26th October 2018 With the support of Which role can Africa agriculture sector play in global climate change mitigation efforts considering natural constraints and large areas at the same time?
  6. 6. « 4 per 1000 » Africa Symposium Johannesburg, 24-26th October 2018 With the support ofWith the support ofNAME6 Soil and water conservation • Terraces • Embankments • Water-infiltration trenches, • Wells and ponds • Irrigation • Drainage Climate-smart agriculture • Organic amendments • Improved varieties and diversification • Improved livestock systems • Multi-purpose leguminous cover cops • Multi-strata agroforestry systems Sustainable land management • Land rehabilitation • Area enclosures in rangelands • Natural regeneration in rangelands • Woodlots and forests
  7. 7. « 4 per 1000 » Africa Symposium Johannesburg, 24-26th October 2018 With the support of Business as usual Mitigation efforts
  8. 8. « 4 per 1000 » Africa Symposium Johannesburg, 24-26th October 2018 With the support of Source of emissions Emissions(CO2eha-1yr-1)
  9. 9. « 4 per 1000 » Africa Symposium Johannesburg, 24-26th October 2018 With the support of
  10. 10. « 4 per 1000 » Africa Symposium Johannesburg, 24-26th October 2018 With the support of
  11. 11. « 4 per 1000 » Africa Symposium Johannesburg, 24-26th October 2018 With the support of
  12. 12. « 4 per 1000 » Africa Symposium Johannesburg, 24-26th October 2018 With the support of Emissions by land cover type
  13. 13. « 4 per 1000 » Africa Symposium Johannesburg, 24-26th October 2018 With the support of
  14. 14. « 4 per 1000 » Africa Symposium Johannesburg, 24-26th October 2018 With the support of
  15. 15. « 4 per 1000 » Africa Symposium Johannesburg, 24-26th October 2018 With the support of
  16. 16. « 4 per 1000 » Africa Symposium Johannesburg, 24-26th October 2018 With the support of Carbon benefits, aggregated over all sites Substantial variability between sites indicates potential to increase carbon benefits, by improved management
  17. 17. « 4 per 1000 » Africa Symposium Johannesburg, 24-26th October 2018 With the support of • Variability depends partly on biophysical, climatic, and ecological factors • Also on local management decisions, and socioeconomic constraints • Optimal management for balancing food security and climate change mitigation and adaptation must be responsive to local conditions. Spatial distribution of carbon fluxes
  18. 18. « 4 per 1000 » Africa Symposium Johannesburg, 24-26th October 2018 With the support of 1. Mitigation in the agriculture sector and restoration of deforested and degraded land is an essential part of the solution to climate change. 2. SLM interventions could restore extremely degraded and almost uninhabitable ecosystems in SSA 3. Land rehabilitation and SLM already provides unintended carbon benefits in these areas, while building productive capacity, ecosystem services, resilience and adaptation. 4. SLM and mitigation co-benefits are not mutually exclusive – SLM creats a vehicle for investment in land and ecosystem restoration 5. Climate change mitigation co-benefits could potentially support sustainability and scalability via access to future climate finance Take home messages
  19. 19. « 4 per 1000 » Africa Symposium Johannesburg, 24-26th October 2018 With the support of

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