1.A.3.a ii (ii) - Domestic Civil Aviation: Cruise

In NFR category 1.A.3.a ii (ii) - Domestic Civil Aviation: Cruise emissions from domestic flights between German airports during cruise stage (above 3,000 feet of altitude) are reported.

In the following, information on sub-category specific activity data, (implied) emission factors and emission estimates are provided.

Specific fuel consumption during cruise-stage is calculated within TREMOD AV as described in the superordinate chapter.

Table 1: annual jet kerosene & avgas consumption during cruise-stage, in terajoules

source: Allekotte et al. (2024) ¹⁾ & Gores (2024) ²⁾

Here, with international flights coming close to pre-panemic levels again, fuel consumption of domestic flights shows a rather slow “recovery”, reaching only about 50% of its pre-pandemic level in 2022:

All country specific emission factors used for emission reporting were basically ascertained within UBA project FKZ 360 16 029 ³⁾ and have since then been compiled, revised and maintained in TREMOD AV (Allekotte et al. (2024)) ⁴⁾.

For more information, please see the superordinate chapter on civil aviation.

Table 2: Annual country-specific emission factors, in kg/TJ

¹ EF(TSP) also applied for PM₁₀ and PM_2.5 (assumption: > 99% of TSP consists of PM_2.5)
² estimated via a f-BC of 0.48 as provided in EMEP/EEA (2023) ⁵⁾, Chapter: 1.A.3.a, 1.A.5.b Aviation, Annex 3, Table A3.2 and Conclusion

Activity data have been revised as a result of the slightly increased percental share of jet kerosene allocated to over-all domestic flights (see description of re-calculations in super-ordinate chapter on 1.A.3.a). Here, as slightly more jet kerosene is allocated to NFR 1.A.3.a ii for 2022, the amounts allocated to NFR sub-categories 1.A.3.a ii(i) and 1.A.3.a ii(ii) have been increased accordingly.

Table 3: Revised annual fuel consumption in 1.A.3.a ii (ii), in terajoules

In addition, rather small revisions occur for several country-specific emission factors derived from Allekotte et al. (2024) ⁶⁾ and for 2022.

Table 4: Revised annual country-specific emission factors for jet kerosene in 1.A.3.a ii (ii), in [kg/TJ]