亜熱帯島嶼生態系における森林炭素交換動態と統合炭素収支
Forest Carbon Exchange Dynamics and Integrated Carbon Budget of a Subtropical Island Ecosystem (原題)
Mengjie Han, Lei Zhu, Minxuan Sun, Jiaxin Zhou, Zhixuan Guo, Yi Leng, Zhe Zhao, Jiaying He, Jian Wang, Chenyi Yuan, Yongxing Cui, Kang Xu, Ruikun Gou, J. Zheng, Le Yu, Chao Wu, Xuejiao Zhang, Qing Zhao, Wei Li
🤖 gxceed AI 要約
日本語
中国東シナ海の大陳島森林で2024年通年の渦相関法によりNEEを観測し、季節変動と放射が主要因であることを示した。森林は55.6〜114.4 gC m−2 yr−1の炭素吸収源として機能するが、森林と漁業由来ブルーカーボンを合算しても島の人為排出を相殺できない。小島嶼の統合炭素収支評価の枠組みを提示し、炭素中立に向けた除去戦略に示唆を与える。
English
Year-round eddy covariance measurements on Dachen Island (East China Sea) quantify forest NEE seasonality, driven mainly by shortwave radiation. The forest acts as a sink (55.6–114.4 gC m−2 yr−1), yet combined forest and fishery blue carbon cannot offset island anthropogenic emissions. The study offers a framework for island-scale carbon budget assessment toward carbon neutrality.
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
日本は離島を多く抱え、島嶼自治体の脱炭素・ブルーカーボン活用（J-クレジット等）に関心が高い。本手法は国内離島の炭素収支把握や地域脱炭素計画の基礎データとして参考になる。
In the global GX context
As ISSB/CSRD push Scope 1–3 and removals accounting, island-scale carbon budgets offer a testbed for integrating nature-based sinks and blue carbon into corporate and municipal net-zero claims. It adds empirical evidence on the limits of offsetting local emissions with local sinks.
👥 読者別の含意
🔬研究者:島嶼生態系の炭素収支を複数手法で制約する実測フレームワークとして参考になる。
🏢実務担当者:自社のオフセット戦略が地域吸収源に依存しすぎるリスクを再確認できる。
🏛政策担当者:離島の炭素中立計画において、吸収源だけでは排出相殺が困難である根拠を提供する。
📄 Abstract（原文）
Abstract Island ecosystems are on the frontline of climate change, yet their terrestrial carbon exchange remains poorly quantified because direct ecosystem‐scale observations are rare. Based on year‐round (2024) eddy covariance measurements of net ecosystem exchange (NEE) in the forest ecosystem of a representative island (Dachen Island) in the East China Sea, we analyzed the seasonal dynamics of carbon fluxes and identified their main drivers. The annual forest carbon sink was further constrained using multiple complementary approaches and integrated into an island‐scale carbon budget assessment. The island forest showed pronounced seasonal variation in NEE, with higher net carbon uptake during the wet season than in the dry season. Within both seasons, shortwave downward radiation was the dominant driver of temporal variation in NEE. The island forest functioned as a carbon sink, with estimated net carbon uptake rates ranging from 55.6 to 114.4 gC m −2 yr −1 across different approaches, while the age‐biomass curve approach yielded a modeled upper bound of 262.6 ± 57.5 gC m −2 yr −1 for potential biomass accumulation. However, the total carbon sinks from forests and fishery‐related blue carbon (2564.1–4060.0 t CO 2 yr −1 ) were generally insufficient to offset total anthropogenic emissions (4363.8–5450.8 t CO 2 yr −1 ) on Dachen Island. Our findings improve direct observational evidence that island forests can function as meaningful carbon sinks, but also show that they are unlikely to compensate for local emissions without substantial emission reductions. This study offers a framework for assessing carbon budgets on small islands, thereby informing integrated carbon dioxide removal strategies toward carbon neutrality.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.5281/zenodo.20193509first seen 2026-09-21 04:41:37
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