• • Transportation and distribution accounts for 88.73% of positive carbon emissions in the ship supply chain life cycle, making it the primary target for decarbonization efforts.
• • Scrapping and recycling provides a carbon offset benefit of 6.77%, demonstrating the importance of circular economy practices in reducing net emissions.
• • Among five reduction scenarios, green logistics achieves an 18.44% reduction efficiency, second only to the comprehensive scenario (20.95%), and is identified as the core pathway for decarbonization.
• • Sensitivity analysis shows that optimizing the LNG carbon emission factor within the green logistics scenario can further enhance reduction effects, highlighting the role of fuel choice and efficiency.