Emissions of Maritime Transport: a Reference System

Abstract

This paper presents the methodology for a comprehensive maritime transport database of activity data, specific energy consumption, emission factors and total emissions that has been developed within the EX-TREMIS project. The model is built upon 3 modules: the fleet module, the transport activity module and the emission module.
The fleet module defines the ship categories, the loading capacities and the engine characteristics of the different vessels by using EUROSTAT data, Sea Web Lloyd’s database and international literature. The transport activity module transforms total cargo and passenger traffic (main source here are EUROSTAT data and CEMT statistics) into ship-equivalents. These ship-equivalents are further transformed into ship-hours. The emission module calculates energy uses and CO2, NOX, SO2, CO, HC, CH4, NMHC, PM emissions from the resulting maritime activities. We used technology based emission factors to take into account the technological evolution of vessels.
To illustrate, we present some results (emissions, fuel consumption and NOX emission factors) for Spain. The overall methodology and results as the country specific energy consumption and emission factors per ship type and size class can be extracted from the EX-TREMIS website (www.ex-tremis.eu) in January 2008.