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中国都市内の微細解像度炭素動態マッピングが明らかにする炭素中立性への不平等な貢献

Fine-resolution carbon dynamics mapping reveals unequal contributions to carbon neutrality within Chinese cities (原題)

Lixing Wang, Zongyao Sha, Tao Li, Taochun Sun

Carbonsphere📚 査読済 / ジャーナル2026-09-02#炭素会計Origin: CN
DOI: 10.26599/cs.2026.9510010
原典: https://doi.org/10.26599/cs.2026.9510010

🤖 gxceed AI 要約

日本語

中国の三大都市圏を対象に、250m・月次の統合モデルで純炭素排出量（NCE）を評価。都市間・都市内の炭素中立性の不平等を定量化し、産業都市では都市内格差が顕著であることを示した。高排出都市が地域格差を主導することを強調し、都市緑化と排出削減政策への具体的示唆を提供する。

English

An integrated model assesses net carbon emissions at 250-m monthly resolution across three Chinese urban agglomerations, revealing seasonal patterns and inequalities in carbon neutrality. Intra-city inequality is pronounced in industrial cities, while inter-city disparities are driven by economic imbalances, with high-emission cities dominating regional inequality. Findings offer actionable insights for urban afforestation and mitigation policies.

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

日本の自治体や都市計画において、カーボンニュートラル達成に向けた地域内の排出格差を可視化する手法として参考になる。SSBJや温暖化対策計画の策定に際し、都市スケールの詳細な排出評価は政策立案の基礎データとして有用。

In the global GX context

This study provides a high-resolution method for assessing urban carbon neutrality inequalities, relevant to global urban climate policy. It demonstrates how intra- and inter-city disparities can be quantified, offering insights for differentiated mitigation strategies applicable to cities worldwide, complementing TCFD/ISSB-aligned disclosure with spatial granularity.

👥 読者別の含意

🔬研究者:Provides a fine-resolution modeling approach for urban carbon accounting and inequality analysis.

🏢実務担当者:Offers a framework for identifying high-emission zones within cities to target mitigation efforts.

🏛政策担当者:Highlights the need for differentiated policies addressing intra-urban carbon inequalities.

📄 Abstract（原文）

Abstract Understanding the inequalities of carbon neutrality within cities is essential for implementing differentiated carbon reduction policies. Here we develop an integrated model to conduct a fine-resolution (250-m, monthly) assessment of net carbon emissions (NCE) for three major urban agglomerations in China. Our results precisely depict the seasonal patterns of NCE and highlight the diverse urban carbon dynamics that contribute to inequalities in carbon neutrality. Nearly half of the 48 cities exhibited NCE exceeding 1000 gC・m-2・a-1, while only 5 cities functioned as carbon sinks. Theil index (T) analysis reveals that intra-city inequalities are more pronounced in industrial cities (T＞0.11), while inter-city disparities are primarily driven by economic and industrial imbalances, particularly in the Pearl River Delta, where T has reached 0.18. This emphasizes the dominant role of high-emission cities in shaping regional inequalities. These findings provide actionable insights for urban afforestation and emission mitigation policies aimed at achieving carbon neutrality.

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