‘Maritime regulations crossroads: bridging IMO’s CII and EU ETS through the EUA efficiency indicator’

IF 4.8 Q2 TRANSPORTATION

Transportation Research Interdisciplinary Perspectives Pub Date : 2026-07-01 Epub Date: 2026-06-29 DOI:10.1016/j.trip.2026.102126

Anastasia Christodoulou, Jason Kontochristos

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Abstract

In order to reduce shipping Greenhouse Gas (GHG) emissions, both global and regional regulatory frameworks have been developed by the International Maritime Organisation (IMO) and the European Union (EU) respectively. The purpose of this study is to identify the relationship among these regulatory frameworks within the shipping industry. In order to facilitate this comparison, the IMO’s Carbon Intensity Indicator (CII) and the EU Emission Trading System (ETS) are analyzed in order to identify similarities, differences and examine if a correlation between the two regulations exists. Voyage data from selected vessels were gathered and analyzed to provide the CII rating of the vessels and EU ETS costs associated with the respective voyages. Building on these cases’ results, a new indicator – the EUA Efficiency Indicator − was developed to estimate the accumulative result of the co-existence of the two regulations and determine the prevailing combined mechanism of global and regional decarbonization initiatives.

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“海事法规十字路口：通过EUA效率指标架起IMO CII和EU ETS的桥梁”

为了减少航运温室气体（GHG）排放，国际海事组织（IMO）和欧盟（EU）分别制定了全球和区域监管框架。本研究的目的是确定航运业内这些监管框架之间的关系。为了便于比较，本文分析了国际海事组织的碳强度指标（CII）和欧盟排放交易系统（ETS），以确定两者之间的异同，并检查两者之间是否存在相关性。收集并分析了选定船舶的航次数据，以提供船舶的CII评级和与各自航次相关的EU ETS成本。在这些案例结果的基础上，开发了一个新的指标——EUA效率指标，以估计两项法规共存的累积结果，并确定全球和区域脱碳倡议的普遍联合机制。

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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