The Value of Reversible Carbon Storage in a Zero-Emissions World
ゼロエミッション世界における可逆的炭素貯蔵の価値 (AI 翻訳)
Allegra Mayer, Jerome Dumortier, Zeke Hausfather, Jennifer Pett‐Ridge, Eric Slessarev
🤖 gxceed AI 要約
日本語
本論文は、可逆的（土壌管理等）と耐久性（地中貯留等）の炭素除去（CDR）のコストと温暖化抑制効果を比較。可逆的CDRを耐久性CDRへの橋渡しとして利用する方が、恒久的維持や即時移行よりも費用対効果が高い可能性を示す。ただし、制度の安定性が鍵と指摘。
English
This paper compares reversible (e.g., soil management) and durable (e.g., geologic storage) carbon removal approaches, focusing on cost and climate impact. It finds that using reversible CDR as a bridge to durable CDR may be more cost-effective than perpetual maintenance or immediate transition, but emphasizes institutional stability risks.
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、農地土壌炭素貯留が注目されるが、本論文はその効果の可逆性と耐久性CDRへの移行戦略を経済的に評価。SSBJやJクレジット制度での位置づけに示唆を与える。
In the global GX context
This paper provides a systematic comparison of reversible vs durable carbon removal strategies, relevant to global climate policy discussions under the Paris Agreement and net-zero targets. Its findings on cost-effectiveness and institutional risks inform CDR deployment decisions.
👥 読者別の含意
🔬研究者:Carbon removal modeling methodology and cost-benefit framework for comparing reversible and durable approaches.
🏢実務担当者:Insights for companies investing in nature-based solutions or direct air capture, especially regarding long-term carbon credit strategies.
🏛政策担当者:Policy design implications for CDR portfolios, emphasizing the need for institutional frameworks to manage reversibility risks.
📄 Abstract（原文）
Atmospheric carbon dioxide removal (CDR) is required to stabilize global temperature. CDR can be achieved via ecosystem-based approaches that are cost-effective but reversible (e.g., soil and forest management) or by more durable but expensive approaches (e.g., direct air capture coupled with geologic storage). Here, we examine trade-offs between these approaches, focusing on timing, climate impacts, and cost. We simulated reversible carbon accrual for a range of CDR contract structures using a general minimalist model of ecosystem carbon cycling, and parameterized it to simulate US agricultural soil management─specifically cover cropping─as a case study. We then quantified the resulting impact on atmospheric carbon and global temperature using a climate model emulator. We find that maintaining a patchwork of reversible CDR projects by replacing lapsed projects with new projects can reduce warming by 22-195 μ°C in 2100 and that the magnitude of this cooling effect depends on how effectively the patchwork is maintained. Long-term maintenance of reversible CDR projects requires institutional stability that cannot be guaranteed over multiple decades. Consequently, effective CDR ultimately requires replacing reversible projects with durable projects. To address this problem, we modeled the cost of replacing reversible agricultural soil CDR with geologic CDR. We found that using reversible CDR as a bridge to durable CDR is potentially more cost-effective as a global cooling strategy (0.20-0.81 billion USD per μ°C avoided) than perpetual maintenance of reversible CDR (0.32-1.31 billion USD per μ°C avoided) or an immediate transition to durable CDR (1.37-2.19 billion USD per μ°C avoided). However, we emphasize that institutional commitments to maintain reversible CDR projects cannot be guaranteed. Reliance on reversible CDR as a bridge to durable CDR therefore carries an unknown amount of risk and will only function if efforts to maintain reversible CDR are robust.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1021/acs.est.6c00333first seen 2026-06-18 05:47:12
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