leap partnership – 1st meeting of the technical advisory group on soil carbon stock changes
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1st Meeting of the Technical Advisory Group on Soil Carbon Stock Changes
LEAP Partnership – 1st meeting of the Technical Advisory Group on Soil Carbon Stock ChangesDr Aaron Simmons, NSW Department of Primary Industries, Australia
1st Meeting of the Technical Advisory Group on Soil Carbon Stock Changes
An initiative to benchmark the environmental performance of
livestock systems using life cycle thinking
1st Meeting of the Technical Advisory Group on Soil Carbon Stock Changes
Technical Advisory Group on Soil Carbon Stock Changes
ScopeDevelop guidelines for the estimation of changes in soil organic carbon stocks in livestock systems
to support life cycle assessment of livestock systems
PurposeTo achieve the mitigation potential offered by
carbon sequestration in livestock production (and draw a more complete picture of GHG sources
and sinks)
1st Meeting of the Technical Advisory Group on Soil Carbon Stock Changes
0.4 % increase in global soil organic carbon levels can halt the annual increase in atmospheric CO2
1st Meeting of the Technical Advisory Group on Soil Carbon Stock Changes
- Rangelands (Grasslands, Savannas, Shrublands, Woodlands, Wetlands and Tundra)- Pastures- Forage and fodder crops- Crop residues
Applicable livestock systems
1st Meeting of the Technical Advisory Group on Soil Carbon Stock Changes
Key challenges
ScaleSpatial
variability
Data quality
Uncertainty
Minimum detectable
change
Rigour of assessment of livestock
systems
1st Meeting of the Technical Advisory Group on Soil Carbon Stock Changes
Tiered approach
Tier 1(e.g. IPCC)
Tier 2(e.g. RothC)
Tier3(e.g. DAYCENT)
Most appropriate determined by
Data availability/quality
Resource availability
Expected/observed spatial variability
Minimum detectable change and timeframes
Specific information requirements (e.g. 0 – 30 cm
for international GHG reporting requirements)
1st Meeting of the Technical Advisory Group on Soil Carbon Stock Changes
Three workstreams
Baselining SOC stocks
Role of modelling in SOC estimations
Estimation of SOC stock changes
Cross-cutting issues
Applicability to scale
Uncertainty and error
Specificity (climate/soil/
production system)
Standarized database of SOC stocks
1st Meeting of the Technical Advisory Group on Soil Carbon Stock Changes
Workstream 1 - Baselining SOC stocksSources of uncertainty•Sampling/Spatial variability/Depth/Temporal variability
Carbon determination•Laboratory methods/Stock estimation/Equivalent soil mass
Geostatistical analysis
Integration into flow chart to aid implementation
1st Meeting of the Technical Advisory Group on Soil Carbon Stock Changes
Workstream 2 - Modelling SOC
Decision matrix to guide choice of modelling approach•Scale, purpose, data availability/quality, system
Initialisation process
Validation
1st Meeting of the Technical Advisory Group on Soil Carbon Stock Changes
Workstream 3 - Estimating SOC stock changes Overlap 1 + 2
Decision tree to guide users•Purpose, resources relevant to baselining, minimum detectable change, spatial variability
Focus on end users•Life cycle assessment practitioners, need to collect additional information (system input/output changes)
1st Meeting of the Technical Advisory Group on Soil Carbon Stock Changes
1st Meeting of the Technical Advisory Group on Soil Carbon Stock Changes
1st Meeting of the Technical Advisory Group on Soil Carbon Stock Changes
Next steps
Workstreams draft text
Face-to-face July 2017
External review
Report submission
Public review and revision
Release of final report
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