航空における国家水素政策の不平等：気候緩和への隠れた障壁
National hydrogen policy inequality in aviation: a hidden barrier to climate mitigation (原題)
Saeed Rostami, Khodayar Javadi, Abbas Maleki
🤖 gxceed AI 要約
日本語
本研究は、水素航空への移行を阻む国家政策枠組みの不整合に着目し、221カ国・地域の政策準備度を評価する複合指標「水素航空政策指標（HAPI）」を提案する。結果、世界規模で政策の不平等が顕著であり、特に米国は排出量に見合わない低い政策関与で最下位となった。政策と排出の乖離は気候緩和への重大な障壁であることを示す。
English
This study proposes a novel composite index, the Hydrogen Aviation Policy Index (HAPI), to assess policy readiness for hydrogen in aviation across 221 countries and territories. Results reveal significant global policy inequality, with the US ranking worst due to low policy engagement relative to its emissions. The disconnect between climate responsibility and policy action highlights a hidden barrier to climate mitigation.
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
日本の水素基本戦略や航空分野での水素活用検討に示唆を与える。国際的な政策整合性の欠如が日本の水素サプライチェーン構築や国際競争力に影響する可能性があり、政策立案の参考となる。
In the global GX context
This paper contributes to global GX scholarship by quantifying policy inequality in hydrogen aviation, a nascent area. It offers a framework for assessing national readiness, relevant for ISSB-aligned transition planning and international climate policy coordination.
👥 読者別の含意
🔬研究者:Provides a novel composite index (HAPI) for cross-national policy comparison in hydrogen aviation, useful for further empirical studies.
🏢実務担当者:Highlights policy risks and opportunities for companies investing in hydrogen aviation infrastructure or aircraft.
🏛政策担当者:Offers evidence of policy gaps and inequality, urging alignment of national frameworks to support hydrogen aviation.
📄 Abstract（原文）
As the aviation industry seeks to reduce its climate impact, hydrogen has emerged as a promising alternative to conventional jet fuels due to its potential for zero carbon dioxide emissions and reduced non-CO₂ effects. However, beyond well-known technological, economic, and infrastructural obstacles, the global transition to hydrogen-powered aviation faces the lack of alignment of national policy frameworks as an overlooked barrier. Quantifying the inequality of national policy frameworks is raised as a critical question. This study directly addresses this gap by proposing a novel composite index – the Hydrogen Aviation Policy Index (HAPI)- to assess the policy readiness of 221 countries and territories to promote hydrogen in aviation. HAPI is constructed through min–max normalization, heuristic weighting, and multi-way interaction terms that enable cross-national comparisons. Results reveal significant policy inequality across the globe. While the Global North shows substantial inequality, the Global South exhibits what we term ‘neutral uniformity’ – most countries have near-zero HAPI scores, reflecting uniform policy inaction rather than equitable progress. Norway and the United Kingdom emerge as leaders in promoting hydrogen aviation, whereas the United States ranks as the worst-performing country due to its low policy engagement relative to its share of aviation emissions and market. Accordingly, there is no meaningful correlation between HAPI scores and national aviation emissions, suggesting a clear disconnect between climate responsibility and policy action. Sensitivity and cluster analyses confirm the index’s robustness and highlight structural divergence among nations. These findings indicate that inequality in national hydrogen aviation policies represents a significant barrier to climate mitigation.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.6084/m9.figshare.33292499.v1first seen 2026-09-08 04:37:56 · last seen 2026-09-10 04:36:59
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