Flight methodology

Base Empreinte

ADEME emission factor database

Factors from Base Empreinte, ADEME's official public database of emission factors for carbon accounting in France. The factor depends on the distance and the aircraft size, with separate values for smaller jets and turboprops.

Publisher: ADEME
Best for: Carbon accounting in France with ADEME factors
Result: One total per trip, for all travellers
Energy scope: WTW
Non-CO₂ effects: Included by default, can be switched off
Factor year: Not selectable

How it works

Distance comes from the airports, or from the actual distance where known.
Factors vary by distance band and aircraft size: under 50, under 100, under 220 or over 220 seats. Without a size, SQUAKE uses an average aircraft.
ADEME's factors cover producing the fuel and burning it in flight, while taxiing and on the ground, including the auxiliary power unit.
When non-CO₂ effects are included, ADEME doubles the combustion emissions.

Trip details used

When a detail is missing, SQUAKE uses the default.

Detail	Default	Notes
Origin and destination airports	Required	Trips with connections are calculated leg by leg.
Actual distance	Calculated from the airports	Replaces the airport-based distance.
Aircraft size	Average aircraft	Jet or turboprop can be set for smaller aircraft.
Number of travellers	1
Sustainable aviation fuel	None	A SQUAKE adjustment outside ADEME's factors.

What is included

Included

Producing the fuel and burning it, including taxiing and the auxiliary power unit
Non-CO₂ effects through ADEME's multiplier (on by default)

Not included

Airport infrastructure

Limitations

Factors are averages by distance and aircraft size, with no cabin class detail.
The factor edition cannot be selected.

Sources

ADEME: Base Empreintebase-empreinte.ademe.fr
ADEME's public database of emission factors.
ADEME: air transport factor documentationprod-basecarbonesolo.ademe-dri.fr
What the aviation factors cover and the non-CO₂ multiplier (in French).