炭素隔離と回避排出が明らかにする北京市都市緑地の純炭素便益（2000–2024年）
Carbon sequestration and avoided emissions reveal the net carbon benefit of urban green space in Beijing (2000–2024) (原題)
Kai Zhou, Yuanfei Hao, Yingshuo Lyu, Shoubang Huang, Hao Yin, Xi Zheng
🤖 gxceed AI 要約
日本語
北京の都市緑地を対象に、生態系の純炭素隔離（NEP）と冷房需要抑制による回避排出を統合した空間的炭素収支フレームワークを構築した。2000〜2024年でNEPは約7倍に増加し、純炭素便益は2012年頃にプラス転換したと推定。回避排出は全市NEPの5〜6%程度だが人口曝露の高い都心に集中し、隔離と回避排出は空間パターンが対照的であることを示した。
English
A spatially explicit carbon-budget framework integrates net ecosystem productivity, life-cycle emissions, and cooling-induced avoided emissions for Beijing's urban green space (2000–2024). NEP rose roughly sevenfold and net carbon benefit crossed zero around 2012. Avoided emissions were smaller (5–6% of NEP) but concentrated in dense central areas, supporting functionally differentiated green-space planning.
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
都市緑地を炭素隔離と回避排出の両面で評価する手法は、自治体の脱炭素計画やTNFD・生物多様性文脈での自然基盤ソリューション評価に示唆を与える。日本では都市緑地のCO2吸収量算定や緑の基本計画の高度化に関連しうる。
In the global GX context
Adds a methodological template for counting avoided emissions alongside sequestration in nature-based solutions, relevant to how cities report climate benefits under emerging natural-capital and TNFD-adjacent frameworks. The urban–rural differentiation logic is transferable to other metropolitan disclosure contexts.
👥 読者別の含意
🔬研究者:都市緑地の炭素便益を隔離と回避排出で統合計測する空間フレームワークの実証例として参照できる。
🏢実務担当者:都市開発・緑地計画において、冷房需要と人口曝露の高い立地に緑地を配置する便益根拠として活用できる。
🏛政策担当者:自治体の緑地計画や自然基盤ソリューションの炭素評価手法の設計に示唆を与える。
📄 Abstract（原文）
Urban green spaces (UGS) are widely promoted as nature-based solutions for climate mitigation, yet their carbon benefits are difficult to compare because ecosystem sequestration and demand-side emission reductions are often estimated separately under inconsistent accounting boundaries. We developed a spatially explicit carbon-budget framework to assess the metropolitan green-space system of Beijing from 2000 to 2024, integrating net ecosystem productivity (NEP), life-cycle carbon emissions, and cooling-induced avoided emissions. Under the baseline parameterization, linear interpolation between the 2010 and 2015 estimates suggested that NCB crossed zero around 2012, slightly earlier than net carbon sequestration (NCS) around 2013. This difference reflects the additional contribution of cooling-induced avoided emissions, which allowed the overall carbon budget to become positive before net sequestration alone did. The long-term transition was dominated by increasing ecosystem carbon uptake, with NEP increasing approximately sevenfold, whereas cooling-induced avoided emissions provided a smaller, spatially concentrated contribution, equivalent to about 5–6% of citywide NEP in recent years. The two components showed contrasting spatial patterns: ecological conservation areas contributed most of the NCS through extensive and productive vegetation, whereas central urban green spaces generated higher area-normalized avoided emissions because they overlapped more closely with areas of high population exposure and cooling demand. NCS was mainly associated with environmental and vegetation conditions, whereas avoided emissions were more strongly associated with population exposure and landscape configuration. These results support functionally differentiated green-space planning across the urban–rural gradient: maintaining extensive ecological capacity in peripheral areas while strategically locating urban green space where cooling demand and population exposure are concentrated.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1016/j.landurbplan.2026.105827first seen 2026-11-10 05:04:28 · last seen 2026-11-14 05:12:20
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