Lateral Coastal Blue Carbon Export Fuels a Deep‐Ocean Carbon Sink in an Oligotrophic Warm Pool
沿岸ブルーカーボンの水平輸送が貧栄養温暖プールの深海炭素シンクを促進する (AI 翻訳)
Hsueh-Han Hsieh, Yung‐Yen Shih, Chun Hoe Chow, Tzu‐Chieh Chung, Syun‐Han Wu, Vicente G. Abedneko, Chin-Hsin Liao, Tse‐Min Lee, Jingjing Zhang, Jianfang Chen, Laodong Guo, Hernando P. Bacosa, Chin‐Chang Hung
🤖 gxceed AI 要約
日本語
西部北太平洋の温暖プールで深度別の粒子状有機炭素フラックス、δ13C、環境DNAを測定。1000mでのPOCフラックスは古典的モデルの予測より2～4倍高く、マクロアルジェ、マングローブ、海草のeDNAが深層で検出された。沿岸ブルーカーボンが深海に効率的に輸送される新たな経路を実証した。
English
Depth-resolved POC fluxes, δ13C signatures, and eDNA from sediment traps at 150, 500, and 1000 m in the western North Pacific warm pool reveal that coastal blue carbon (CBC) from macroalgae, mangroves, and seagrasses is efficiently transported to the deep ocean, with POC fluxes at 1000 m being 2–4 times higher than classical model predictions. This identifies a previously underappreciated pathway linking coastal vegetation to deep-ocean carbon storage.
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
日本のような排他的経済水域が広い島嶼国では、ブルーカーボン生態系の炭素貯留量を正確に評価するために、本論文が示すような現場観測に基づく深海への炭素輸送の検証が重要となる。SSBJやTCFDにおける自然資本関連の開示にも示唆。
In the global GX context
This study provides crucial in situ evidence that coastal blue carbon contributes significantly to deep-ocean carbon sequestration, challenging model-based estimates. For global carbon accounting frameworks (e.g., IPCC guidelines, ISSB standards), it highlights the need to incorporate lateral transport pathways in national greenhouse gas inventories, especially for island nations with large EEZs.
👥 読者別の含意
🔬研究者:Provides empirical evidence that coastal blue carbon is transported to the deep ocean, necessitating revision of carbon cycle models and inclusion in blue carbon budgets.
🏢実務担当者:Offers validation for blue carbon offset projects by demonstrating long-term storage potential, useful for sustainability disclosures and carbon credit issuance.
🏛政策担当者:Underscores the importance of in situ measurements for accurate carbon accounting in countries with large EEZs, relevant for national climate commitments under the Paris Agreement.
📄 Abstract（原文）
Abstract Coastal blue carbon (CBC) ecosystems export organic matter offshore, but their contribution to deep‐ocean carbon sequestration remains insufficiently quantified. We measured depth‐resolved particulate organic carbon (POC) fluxes, δ 13 C signatures, and environmental DNA (eDNA) from sediment traps deployed at 150, 500, and 1,000 m in the western North Pacific warm pool. POC fluxes at 1,000 m were two‐ to four‐fold higher than predicted by classical attenuation models, indicating efficient deep‐water transfer driven by both vertical export and lateral inputs. eDNA from sinking particles revealed macroalgae, mangrove, and seagrass taxa throughout the mesopelagic and bathypelagic layers, demonstrating long‐distance transport of CBC material. δ 13 C values showed predominantly marine‐derived POC, but with measurable CBC contributions persisting at depth. These observations identify a previously underappreciated pathway linking coastal vegetation to deep‐ocean carbon storage in oligotrophic gyre systems. They also highlight the need for ground‐truth biological carbon pump (BCP) measurements, particularly for oceanic island countries with small land areas yet large exclusive economic zones (EEZs), where accurate carbon accounting depends on in situ validation of model‐based estimates.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1029/2025gb009034first seen 2026-07-26 05:24:19
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