Groundwater depletion contributes to an increase in global carbon emissions
地下水枯渇が世界の炭素排出量増加に寄与 (AI 翻訳)
Tong Sun, Li He, Fubin Zhang, Yao Wang, Haochuan Guo, Yanan Tian, Xu Duan, Yugeng Luo, Quanzhou Li, Kaiwen Cheng
🤖 gxceed AI 要約
日本語
世界の地下水枯渇（GWD）による炭素排出を評価。17万以上の観測井データと約2.9万のHCO₃⁻濃度データを用い、GWD総排出量は年間約52±18MMT CO₂と推定。これは草原の正味排出量（約35MMT CO₂/年）を上回る。中国、ブラジル、インドが主要排出国。
English
This study quantifies global carbon emissions from groundwater depletion (GWD) using >171,000 monitoring wells and 28,902 HCO₃⁻ measurements. Total GWD-induced emissions are estimated at 52±18 MMT CO₂/yr, exceeding net emissions from grasslands (~35 MMT CO₂/yr). China, Brazil, and India are the top three contributors.
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
本論文は地下水という従来考慮されていなかった炭素源を定量化した点で学術的意義は大きいが、日本のGX文脈（SSBJや企業開示）への直接的な接続は困難。日本の地下水管理や水資源政策の参考として間接的には有用。
In the global GX context
This paper highlights a previously overlooked carbon source—groundwater depletion—which adds to the global carbon budget. While not directly linked to corporate disclosure or transition finance, it informs climate science and could influence national GHG inventories.
👥 読者別の含意
🔬研究者:Novel estimation of a carbon source that should be considered in global carbon cycle models.
🏛政策担当者:May need to account for GWD-emissions in national GHG inventories, especially for water-scarce countries.
📄 Abstract（原文）
Carbon emissions from groundwater depletion (GWD) can be involved in the global carbon cycle; however, it is poorly understood that how much contribution they have. We here generate two maps on global GWD using measurements from >171,000 monitoring wells and on global groundwater bicarbonate (HCO₃⁻) concentrations using the meta data from 28,902 measurements. We then evaluate the global GWD-induced carbon emissions and show that 1) the total emissions from GWD can be a type of significant source (52 ± 18 MMT CO₂ yr⁻¹) within the global carbon cycle, which have exceeded the net emissions of grasslands (~35 MMT CO₂ yr⁻¹), one of the world's main carbon sources; 2) the total GWD is approximately 550 ± 73 km³/year in recent 20 years, which is generally consistent with previous studies; 3) China (6.7 ± 1.6 MMT CO₂ yr⁻¹), Brazil (6.6 ± 2.5MMT CO₂ yr⁻¹), and India (5.8 ± 1.5 MMT CO₂ yr⁻¹) are the top three contributors of GWD-induced carbon emissions.
🔗 Provenance — このレコードを発見したソース
- openalex https://doi.org/10.1038/s41467-026-73521-2first seen 2026-06-18 05:46:32
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