Maritime Emissions (MarU)

Maritime Emissions (MarU) is the Norwegian Coastal Administration's model for AIS-based estimation of ship traffic emissions. The model is based on methodology from The International Council of Clean Transport (ICCT) and the fourth GHG Study from the International Maritime Organization (IMO), as well as previous models such as Havbase and Marine Emission (proof of concept).

The model is written in Python (PySpark).

Data flow

For detailed data flow, see notebooks

Data sources

Table Name	Description
AIS Data	Data from the Automatic Identifaction System (AIS).
Areas	Geographic areas. Used to enrich AIS data and calculate emissions within the areas.
Vessel	Ship register combined from several sources (IHS Markit, ShipInfo, SafeSeaNet, NOR and NIS flag registers) enriched with specific logic, such as fuel type and size groups.
Emission Variables	Input of various factors for emissions.

Abbrevations and logic

Phases

• a: anchor
• aq: aquacultur
• c: cruise
• dp-o: dynamic positioning offshore
• f: fishing
• m: maneuver
• n: node (berth)
• p: using shore power

Voyage types

• Berthed: Voyage type is set to "Berthed" if the voyage has a defined stop.
• Domestic: First country visited is Norway or Svalbard, and last country visited is Norway or Svalbard.
• International out: First country visited is Norway or Svalbard
• International in: Last country visited is Norway or Svalbard
• Transit: None of the above.