社説：海洋負排出技術と生態リスク

Unofficial AI-generated summary based on the public title and abstract. Not an official translation.

🔬研究者:海洋CO2除去の実証研究の重要性と、グリーン燃料普及における炭素税の効果に関する知見。

🏢実務担当者:海運・港湾事業者は、グリーン燃料サプライチェーン構築や岸電投資の政策動向を把握する参考になる。

🏛政策担当者:海運脱炭素政策の設計において、炭素税と供給者間連携の効果を考慮すべき。

The growing pressure of global warming has driven the maritime industry toward decarbonization, 9and the International Maritime Organization has adopted increasingly stringent emissions-reduction 10targets. Yet the path to a low-carbon transition remains far from smooth. Green fuel supply chains lack 11 coordination, shorepower promotion involves too many stakeholders with competing interests, and 12 even seemingly "natural" climate solutions require rigorous scrutiny of their real-world effectiveness. 13Against this backdrop, this Research Topic brings together six papers by scholars from China and 14 abroad, each exploring how decarbonization technologies, marine carbon removal pathways, and 15 policies shape the global maritime industry from a distinct perspective. 16 Jiang et al. (Jiang et al., 2025) focus on the green marine fuel supply chain. They develop a game-17 theoretic model including the government, a port, and both green and conventional fuel suppliers. Their 18 results confirm that carbon taxes effectively encourage the adoption of green fuels, and that 19 collaboration between the two supplier groups substantially reduces government expenditure. More 20 notably, they find that greater substitutability between green and conventional fuels is associated with 21 higher government expenditure, greater port profits, and higher total supplier profits. 22Seaweed farming is widely viewed as a nature-based solution for marine carbon removal. However, 23Teevan-Kamhawi et al. (Fiona Teevan-Kamhawi, 2026) conducted a full growing season of 24 high-frequency monitoring at a sugar kelp farm in Rhode Island, USA, and found that kelp cultivation 25 did not achieve net CO₂ removal. In fact, surface pCO₂ at the farm site was slightly higher than at the 26 control site. This finding serves as a critical reminder: nature-based solutions cannot be taken for 27 granted without robust, long-term observational evidence. 28 Melendez-Perez et al. (Melendez-Perez et al., 2026) depended strongly on temperature and CO₂ equilibration conditions. Importantly, even at the highest 36 alkalinity level, the authors did not observe "runaway" precipitation, suggesting that pre-equilibrated

• openalex https://doi.org/10.3389/fmars.2026.1954700first seen 2026-09-08 04:43:41