Integrating multi-source maritime information to estimate ship exhaust emissions under wind, wave and current conditions

How to accurately calculate ship exhaust emissions has become urgent needs. In this paper, multi-source maritime information is integrated to estimate ship exhaust emissions under ocean environment. Influences of wind, wave and current on ship speed are firstly analyzed and mathematically modeled. Based on the influences, ocean environment information and ship trajectories are integrated to identify ship activities exactly. After that, ship activity based calculation method is present to obtain exhaust emissions from ship in various activities. Contribution ratios of different ship type and ship activities have been further discussed. In a case study of Ningbo-Zhoushan port in China, greenhouse gas (CO2, CO, SOx NOx and PM) emissions from ships in 2014 calculated by the proposed method are 8.72 x 10(5) ton, 2.07 x 10(3) ton, 1.47 x 10(4) ton, 2.60 x 10(4) ton and 1.40 x 10(3) ton respectively. The maximum error is under 10%. Experimental results illustrate that the proposed method can produce more accurate ship exhaust emissions than traditional method under ocean environment conditions.