GPC Methodology Reference
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Definition
The GPC Methodology Reference is a summary overview of the Global Protocol for Community-Scale Greenhouse Gas Inventories (GPC) calculation methodoly as documented in [1].
NB: this table is not exhaustive. Cities may use alternative methodologies, activity data and emission factors as appropriate. Methods used to calculate emissions shall be justified and disclosed.
The methodology reference covers the following elements:
- (Emissions) Sectors classifying GHG Emissions Sources according a GHG Emissions Taxonomy
- GHG Emissions Sources Subsector per Sector
- Applicable GHG Emission Scope
- Applicable GHG Emissions Calculation Approaches
- Relevant Activity Data
- Relevant GHG Emission Factor
Reference
| 1. Sector | 2. Subsector | 3. Scope | 4. Approach | 5. Activity Data | 6. Emission Factor |
|---|---|---|---|---|---|
| Stationary Energy | Fuel Combustion within the city boundary | 1 | Fuel Consumption | Amount of Fuel Consumption | Mass GHG Emissions per unit of fuel |
| Stationary Energy | Fuel combustion within the city boundary | 1 | Fuel consumption | Amount of fuel consumption | Mass GHG emissions per unit of fuel |
| Stationary Energy | Consumption of grid-supplied energy consumed within the city boundary | 2 | Grid-energy consumption | Amount of grid- supplied energy consumption | Mass GHG emissions per unit of grid-supplied energy (grid specific emission factor) |
| Stationary Energy | Transmission and distribution losses from grid-supplied energy | 3 | Loss rate based approach | Amount of energy transmitted and average loss rate of the grid | Mass GHG emissions per unit of grid-supplied energy |
| Stationary Energy | Fugitive emissions from fossil fuels extraction and processing | 1 | Direct Measurement | Direct measure | Direct measure |
| Stationary Energy | Fugitive emissions from fossil fuels extraction and processing | 1 | Production-based estimation | Quantity of production in fuel extraction and processing | Mass GHG emissions per unit of fossil fuel production |
| Transportation | Fuel combustion for in- boundary transportation | 1 | ASIF model (Activity, Share, Intensity, Fuel) | Distance traveled by type of vehicle using type of fuel | Mass GHG emissions per unit distance traveled by type of vehicle using type of fuel |
| Transportation | Fuel combustion for in- boundary transportation | 1 | Fuel sold method | Amount of fuel sold | Mass GHG emissions per unit of sold fuel |
| Transportation | Consumption of grid- supplied energy for in- boundary transportation | 2 | Grid-energy consumption model | Amount of electricity consumed | Mass GHG emissions per unit of grid-supplied energy (grid specific emission factor) |
| Transportation | Emissions from transboundary transportation | 3 | ASIF model (Activity, Share, Intensity, Fuel) | Distance traveled or fuel consumed by type of vehicle using type of fuel | Mass GHG per unit distance traveled or fuel consumed by type of vehicle using type of fuel |
| Transportation | Transmission and distribution losses from grid-supplied energy | 3 | Loss rate based approach | Amount of energy transmitted and average loss rate of the grid | Mass GHG emissions per unit of grid-supplied energy |
| Waste | Solid waste disposal | 1 and 3 | First Order of Decay method (GPC recommended) | Amount of waste received at landfill site and its composition for all historical years | Methane generation potential of the waste |
| Waste | Solid waste disposal | 1 and 3 | Methane method Commitment | Amount of waste disposed at landfill site in inventory year and its composition | Methane generation potential of the waste |
| Waste | Biological treatment of waste | 1 and 3 | Waste composition based approach | Mass of organic waste treated by treatment type | Mass GHG emission per unit of organic waste treated, by treatment type |
| Waste | Incineration and open burning | 1 and 3 | Waste composition based approach | Mass of waste incinerated and its fossil carbon fraction | Oxidation factor, by type of treatment |
| Waste | Wastewater | 1 and 3 | Organic content based approach
Organic content of wastewater per treatment type |
Emission generation potential of such treatment type | |
| IPPU | Industrial processes occurring in the city boundary | 1 | Input or output based approach | Mass of material input or product output | Emission generation potential per unit of input/output |
| IPPU | Industrial processes occurring in the city boundary | 1 | Direct Measurement | Direct measure | Direct measure |
| IPPU | Product use occurring within the city boundary | 1 | Input or output based approach | Mass of material input or product output | Emission generation potential per unit of input/output |
| IPPU | Product use occurring within the city boundary | 1 | Direct Measurement | Direct measure | Direct measure |
| IPPU | Product use occurring within the city boundary | 1 | Scaling approach | National or regional level activity or emissions data | Emission factor or scaling factor |
| AFOLU | Livestock emission sources | 1 | Livestock based approach | Number of animals by livestock category and manure management system | Emission factor per head and nitrogen excretion per manure management system |
| AFOLU | Land uses emission sources | 1 | Land area based approach | Surface area of different land use categories | Net annual rate of change in carbon stocks per hectare of land |
| AFOLU | Aggregate sources and non-CO2 emission sources on land | 1 | Varies | Varies | Varies |
References
- ↑ Global Protocol for Community-Scale Greenhouse Gas Inventories, An Accounting and Reporting Standard for Cities, Version 1.1, 2021. WRI, C40, IOCLEI
