Inputs for emissions calculations
Emissions are calculated using three key parameters:- Transport method: for example, ocean, road, air, rail.
- Distance travelled: directly provided or derived from origin and destination data.
- Cargo weight: directly provided or estimated using number of container units.
Transport Method’s Emission Factor × Distance × Cargo weightTo see detailed implementation for specific transport methods, refer to our guides.Determining emission factors
Lune selects the most suitable emission factor for each calculation based on the GLEC Framework. When detailed data is unavailable, we default to industry averages for the relevant transport method.For example:- Detailed data available: If the fuel type and size of the vessel or vehicle are known, the EF is chosen to reflect these specifics.
- Limited data available: If details are unknown, we apply the EF for the average size and most commonly used fuel type in the industry.
Transport method specific calculations
In addition to the EFs from the GLEC framework, maritime and air shipping methods include some unique nuances for emissions calculations. Explore the details below!Maritime shipping
Lune offers two ways to estimate emissions for maritime shipping:- Manual entry: Input shipment details manually.
- Vessel tracking: Use AIS data or planned carrier schedules to retrieve details for past or future shipments.
Air shipping
Lune calculates the EF for air shipments using the IATA RP1678 methodology, as per the GLEC framework. We support two methods for estimating air shipment emissions:- Manual entry: EFs depend on flight length and aircraft type. Distances are calculated using the Great Circle Distance with GLEC-aligned adjustments.
- Identified flight tracking: AirNav Radar is used to identify flight details via flight numbers and origin/destination data. This enables precise calculation of flight legs, routes, and aircraft types, ensuring all stops are accounted for.