A comprehensive structural decomposition analysis of CO2 emissions from vessels: A case study of Japan

IF 13.6 2区经济学 Q1 ECONOMICS

Energy Economics Pub Date : 2025-06-23 DOI:10.1016/j.eneco.2025.108674

Taiga Shimotsuura

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引用次数: 0

Abstract

The increasing focus on zero-emission vessels highlights the need for environmental analyses from a life-cycle assessment perspective. The present study estimates the carbon footprint (CF) of maritime transport in Japan from 2005 to 2022 by assessing the full vessel life cycle, while excluding the end-of-life stage, under varying vessel lifespan scenarios. Furthermore, this study developed a comprehensive structural decomposition analysis (SDA) to quantify stakeholder contributions at detailed vessel life stages under different lifespan scenarios, thereby facilitating the development of more targeted policies. Extending the average vessel lifespan by 5 years results in a cumulative CF reduction of approximately 1.7 Mt-CO₂ compared to that in the baseline scenario, despite increased vessel repair demand. The SDA results demonstrated that shipyards and shipping companies contributed equally to CF reduction. Comparison of SDA across different lifespan scenarios revealed that lifespan extension is a crucial strategy for CF mitigation, suggesting the need to integrate current CF reduction measures with vessel lifespan extension to maximize environmental benefits.

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船舶二氧化碳排放的综合结构分解分析：以日本为例

对零排放船舶的日益关注凸显了从生命周期评估角度进行环境分析的必要性。本研究通过评估不同船舶寿命情景下的整个船舶生命周期（不包括寿命终止阶段），估算了2005年至2022年日本海上运输的碳足迹（CF）。此外，本研究开发了一种全面的结构分解分析（SDA），以量化不同寿命情景下船舶详细寿命阶段的利益相关者贡献，从而促进制定更有针对性的政策。尽管船舶维修需求增加，但与基线方案相比，将船舶平均寿命延长5年可累计减少约1.7 Mt-CO₂的CF。SDA结果表明，造船厂和航运公司对CF的减少贡献相同。不同寿命情景下的SDA比较表明，延长寿命是缓解CF的关键策略，这表明需要将当前减少CF的措施与延长船舶寿命相结合，以最大限度地提高环境效益。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Energy Economics ECONOMICS-

CiteScore

18.60

自引率

12.50%

发文量

524

期刊介绍： Energy Economics is a field journal that focuses on energy economics and energy finance. It covers various themes including the exploitation, conversion, and use of energy, markets for energy commodities and derivatives, regulation and taxation, forecasting, environment and climate, international trade, development, and monetary policy. The journal welcomes contributions that utilize diverse methods such as experiments, surveys, econometrics, decomposition, simulation models, equilibrium models, optimization models, and analytical models. It publishes a combination of papers employing different methods to explore a wide range of topics. The journal's replication policy encourages the submission of replication studies, wherein researchers reproduce and extend the key results of original studies while explaining any differences. Energy Economics is indexed and abstracted in several databases including Environmental Abstracts, Fuel and Energy Abstracts, Social Sciences Citation Index, GEOBASE, Social & Behavioral Sciences, Journal of Economic Literature, INSPEC, and more.