船舶からの排出削減：科学・政策・実務の橋渡し
Mitigating emissions from ships : bridging science, policy, and practice (原題)
Imranul I. Laskar
🤖 gxceed AI 要約
日本語
本博士論文は、専門家調査・政策分析・空間排出モデリングを組み合わせ、海運の脱炭素化を検討する。149名の専門家は2030年炭素強度目標は達成可能だが2050年ネットゼロは困難と予測。LNG燃料のメタンスリップ問題と、カナダを事例としたグリーン回廊の排出削減効果を分析し、国内海運排出が従来推計の約3倍で7割が沿岸部に集中することを示した。
English
This dissertation combines expert elicitation, policy analysis, and spatial emissions modeling to inform shipping decarbonization. 149 experts project the 2030 carbon-intensity target is achievable but net zero by 2050 is unlikely. It analyzes LNG methane slip risks and, using Canada as a case, shows domestic shipping emissions are nearly triple prior estimates with 70% near shore, offering an IPCC-aligned framework.
Unofficial AI-generated summary based on the public title and abstract. Not an official translation.
📝 gxceed 編集解説 — Why this matters
日本のGX文脈において
海運は日本にとって貿易・物流の生命線であり、IMO規制やグリーン回廊は国内海運・造船・港湾政策と直結する。SSBJやScope 3開示における物流排出の算定精度向上にも示唆を与える。
In the global GX context
Shipping sits at the intersection of IMO regulation, TCFD/ISSB Scope 3 logistics emissions, and emerging green-corridor and transition-finance initiatives. The IPCC-aligned spatial inventory offers a transferable method for national maritime emissions accounting relevant to CSRD and disclosure regimes.
👥 読者別の含意
🔬研究者:海運脱炭素の専門家予測と空間排出推計を統合した方法論的枠組みを提供する。
🏢実務担当者:LNG燃料のメタンスリップやグリーン回廊の活用など、海運サプライチェーン排出管理の実務判断に資する。
🏛政策担当者:IMO・国内規制設計において、柔軟な実施を伴う国際規制と市場メカニズムの有効性を示唆する。
📄 Abstract（原文）
Maritime transportation is integral to global trade and a major emitter of air pollution. However, the sector is governed by numerous jurisdictions and at many scales, rendering effective regulations a complex challenge. In this dissertation, I use expert elicitation, policy analysis, and spatial emissions modeling to inform some aspects of policy and practice within the sector and beyond. Chapter 2 presents an expert elicitation study of 149 world-leading experts on key uncertainties in shipping decarbonization. Experts project that shipping is on track to meet its 2030 carbon-intensity targets but unlikely to reach net zero by 2050. They suggest that decarbonization will depend on short-term operational measures and long-term alternative energy sources, with technologies supporting both, but will vary by ship type because of differences in governance and business operations. Two key insights from this study guide the dissertation’s later chapters. In Chapter 3, I examine LNG as a medium-term fuel. In Chapter 4, I conduct an empirical study of green corridors and their role in regulating pollution from maritime transportation. Chapter 3 presents a policy analysis of methane mitigation from natural gas as a marine fuel. Drawing on semi-structured interviews and critical review, it shows that although natural gas offers air quality benefits, its climate benefits are uncertain because of methane slip. Simultaneously, it complies with regulations yet risks locking shipping into a fossil gas-based energy system incompatible with net zero. The chapter finds global regulatory instruments with flexible implementation are best suited to reducing fugitive methane, while market-based mechanisms and informational governance can improve cost-effectiveness and awareness. Using Canada as an empirical case, Chapter 4 characterizes green shipping corridors, identified in Chapter 2 as a key driver, as bilateral maritime routes within Canada and between Canada and other countries. Using a high-resolution spatial emissions inventory, it identifies the highest-emitting routes associated with Canada and highlights where action could most efficiently reduce both GHG and air pollutant emissions affecting near-shore communities. It shows that emissions from Canada’s domestic shipping are nearly triple previous estimates, with 70% occurring near shore, and provides an IPCC-aligned methodological framework applicable to other countries.
🔗 Provenance — このレコードを発見したソース
- openalex http://hdl.handle.net/2429/95302first seen 2026-09-20 04:33:41
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