Research Projects

Project at a Glance

Project Status: complete

Title: Verification of ship emission estimates with monitoring measurements to improve inventory and modeling.

Principal Investigator / Author(s): Corbett, James J. P. E., Ph.D

Contractor: University of Delaware

Contract Number: 01-328

Research Program Area: Atmospheric Processes, Emissions Monitoring & Control

Topic Areas: Mobile Sources & Fuels, Monitoring


This research evaluates accuracy of current marine vessel emissions estimation methods. Pollutants that are addressed in this study include: NOx, SO2, PM, CO2, CO, and HC. This project contributes to research seeking to reconcile apparent differences between inventory estimation methodologies, atmospheric predictions, and field observations. Current emissions inventory methodologies are applied to two different marine vessels, the Sine Maersk, 6600 TEU container vessel built in 1998, and the New Spirit, a 26,562 gross ton (48,183 deadweight ton) bulk carrier built in 2002. Direct monitoring of engine stack emissions was conducted on the Sine Maersk in February 2004, and an aircraft plume study of the New Spirit was conducted as part of a 2002 international atmospheric science experiment. The agreement between emissions calculated using published emissions rates and monitored stack test results is relatively good. The results show that improved emission inventories are consistent with monitoring results; however, emissions rates derived from in-plume observations demonstrated greater disagreement with published emissions rates. Nonetheless, good agreement between monitoring and modeling emissions rates helps confirm that differences between inventory estimates and in-plume observations are likely a result of complex chemical processing within ship plumes.


For questions regarding this research project, including available data and progress status, contact: Heather Choi at (916) 322-3893

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