海洋アルカリ性向上の技術的・環境的・法的・経済的課題への取り組み：バルト海のケーススタディ
Tackling the technological, environmental, legal, and economic challenges of ocean alkalinity enhancement: A case study from the Baltic sea (原題)
Anu Lähteenmäki-Uutela, Jáchym Judl, Jari Silander, Sonja Lavikko, Tuukka Mäkelä, Carolin R. Löscher, Ulf Riebesell, Markus Latvala, Kristian Spilling
🤖 gxceed AI 要約
日本語
本研究はバルト海を対象に、蛇紋岩残渣を用いた海洋アルカリ性向上（OAE）のCO2除去可能性、法的要件、経済的実現性を評価した。CO2除去1トンあたりの排出係数は70kg CO2e未満と推定され、許可には海洋生態系へのリスク評価が必要。経済的には、CDRクレジット価格が100ユーロ/トン以上でなければ成立せず、公共・民間の購入コミットメントが市場不確実性を低減し得ると結論。
English
This study evaluates ocean alkalinity enhancement (OAE) using serpentinite gangue in the Baltic Sea, assessing CO2 removal potential, legal requirements, and economic viability. The carbon emission factor is estimated below 70 kg CO2e per tonne CO2 removed, and permitting requires careful consideration of marine ecosystem risks. Economically, OAE requires CDR credit prices above 100 EUR per tonne CO2 removed to be viable, and commitments from public and private buyers could reduce market uncertainty.
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
日本ではブルーカーボンや海洋吸収源の関心が高まっており、OAEのような海洋CDR技術は今後の政策検討に示唆を与える。ただし、日本周辺海域での実証や法規制の整備は未着手であり、本ケーススタディの知見は今後の検討に有用。
In the global GX context
This study contributes to the global discourse on marine CDR, a topic gaining attention under international climate policy. It provides a comprehensive feasibility assessment that can inform emerging frameworks for ocean-based carbon removal, such as those under the London Protocol and voluntary carbon markets.
👥 読者別の含意
🔬研究者:Provides a multi-dimensional feasibility framework for OAE, including environmental, legal, and economic aspects.
🏢実務担当者:Highlights the economic threshold for OAE viability and the importance of credit purchase commitments for project development.
🏛政策担当者:Offers insights into the legal and regulatory requirements for permitting OAE, relevant for developing marine CDR governance.
📄 Abstract（原文）
Ocean alkalinity enhancement (OAE) is a possible climate mitigation technology that can remove CO 2 from the atmosphere. Here, we studied the feasibility of OAE in a case study using serpentinite gangue and examined the carbon dioxide removal (CDR) potential, the legal requirements, and the economic viability. The carbon emission factor was estimated to stay below 70 kg CO 2 e t −1 CO 2 removed. Permitting would require the risks for marine ecosystems at the site to be carefully considered. Under the assumptions of this case study, OAE would require CDR credit prices higher than 100 € t −1 CO 2 removed to be economically viable. Commitments of public and private actors to buy OAE credits would reduce market uncertainty and could be a way to promote OAE if the environmental impacts are acceptable.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1016/j.isci.2026.116928first seen 2026-08-20 04:36:06
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