# Phase 3 – Nigeria Domestic Aviation Emission Factors: Sources Index

Methodology: ICAO ICEC v13.1-based derivation of Nigeria domestic aviation emission factors.  
All files are stored in `C:\Users\HP\palmgrove\NEFDB\docs\transport_aviation\` (gitignored local source folder).  
Existing files were kept and not overwritten or deleted.

| ID | Title | Filename | Publisher / Year | URL | Supports | Access date |
|----|-------|----------|------------------|-----|----------|-------------|
| S1 | Methodology ICAO Carbon Emissions Calculator v13.1 | `icao_icec_v13_1.pdf` | ICAO / 2024 | https://icec.icao.int/Documents/Methodology%20ICAO%20Carbon%20Emissions%20Calculator_v13_Final.pdf | Core ICEC v13.1 methodology, fuel burn/CO2 calculation logic and passenger-km allocation rules for domestic aviation | 2026-06-19 |
| S2 | IATA CO2 Connect / ICOP General FAQ for Airline Participants | `iata_co2_faq.pdf` | IATA | https://www.iata.org/contentassets/922ebc4cbcd24c4d9fd55933e7070947/icop_faq_general-for-airline-participants.pdf | Airline operational assumptions, load factors and ICOP/CO2 reporting boundaries | 2026-06-19 |
| S3 | EUROCONTROL Standard Inputs – Amount of emissions released by fuel burn | `eurocontrol_emissions_per_fuel.md` | EUROCONTROL / 2024–2025 | https://ansperformance.eu/economics/cba/standard-inputs/latest/chapters/amount_of_emissions_released_by_fuel_burn.html | Jet-A/kerosene mass-to-CO2 emission factors (3.15 kg CO2/kg fuel) and pollutant emission indices | 2026-06-19 |
| S4 | UK DEFRA Greenhouse Gas Reporting Conversion Factors 2024 | `defra_2024_conversion_factors.xlsx` | UK Department for Energy Security and Net Zero / 2024 | https://www.gov.uk/government/publications/greenhouse-gas-reporting-conversion-factors-2024 | Benchmark conversion factors for GHG reporting, including aviation fuel/activity factors | 2026-06-19 |
| S5 | CO2 Emissions from Commercial Aviation, 2020 | `icct_co2_commercial_aviation_2020.pdf` | ICCT / 2020 | https://theicct.org/wp-content/uploads/2021/06/CO2-commercial-aviation-oct2020.pdf | Global aviation emissions baseline, efficiency metrics and domestic/international split context | 2026-06-19 |
| S6 | ATAG Facts & Figures | `atag_facts_figures.md` | ATAG / 2025 | https://atag.org/facts-figures | Industry activity statistics (passengers, RPK, flights, fuel use, load factor) for sanity checks | 2026-06-19 |
| S7 | 2006 IPCC Guidelines for National GHG Inventories, Vol 2 Ch 3 Mobile Combustion | `ipcc_2006_vol2_ch3_mobile_combustion.pdf` | IPCC / 2006 | https://www.ipcc-nggip.iges.or.jp/public/2006gl/pdf/2_Volume2/V2_3_Ch3_Mobile_Combustion.pdf | Aviation fuel combustion emission-factor methodology and default EFs | 2026-06-19 |
| S8 | The contribution of global aviation to anthropogenic climate forcing for 2000 to 2018 | `lee_et_al_2021_aviation_rf.pdf` (existing, also known as `atmenv-d-20-00243_final_24aug2020.pdf`) | Lee et al. / Atmospheric Environment / 2021 | https://www.sciencedirect.com/science/article/pii/S1352231020305689 | Radiative-forcing multipliers and non-CO2 aviation climate impacts | 2026-06-19 |

## Notes

- `icao_icec_v13_1.pdf` was downloaded as a new file alongside the pre-existing `icao_icec_methodology_v13_1.pdf` already in the folder.
- `ipcc_2006_vol2_ch3_mobile_combustion.pdf` already existed in the folder; no overwrite occurred.
- The Lee et al. paper was already present as `lee_et_al_2021_aviation_rf.pdf` (an earlier copy of the manuscript titled `atmenv-d-20-00243_final_24aug2020.pdf`). It is retained unchanged.
- `defra_2024_conversion_factors.xlsx` is the full/advanced user spreadsheet (v1.1, 30 Oct 2024) from the DEFRA 2024 conversion factors publication page.