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Updated: Jun 28, 2025

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Utilizing Soil Density Fractionation to Separate Distinct Soil Carbon Pools
Published on: December 16, 2022
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地球上の土壌の無機炭素の大きさ,分布,脆弱性
Yuanyuan Huang1,2, Xiaodong Song3, Ying-Ping Wang4
1Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China.
まとめ
地球上の土壌は膨大な量の土壌無機炭素 (SIC) を貯蔵している. 窒素による土壌酸性化は この炭素を減少させ 大国に影響を与え 内陸水への炭素の損失を増加させる可能性があります
科学分野:
- 環境科学
- 土壌科学
- 生地化学
背景:
- 地球上の土壌無機炭素 (SIC) の貯蔵量とその脆弱性は十分に理解されていません.
- 炭素循環と気候変動の緩和を理解するには 精密な量化が不可欠です
研究 の 目的:
- 土壌の無機炭素 (SIC) の総量と分布を推定する.
- 将来の環境変化に対する土壌無機炭素 (SIC) の脆弱性を評価する.
- 土壌から内陸水域への無機炭素の年間損失を定量化する.
主な方法:
- フィールドベースの223,593の土壌測定をまとめました.
- グローバルSIC推定のための機械学習モデルの開発と適用
- 陸と水の炭素在庫と内陸の炭酸塩化学の合成
主要な成果:
- 地球上の土壌は,上部2メートルに推定2305 ± 636億トンのSICを貯蔵しています.
- 窒素添加による土壌酸性化は30年以内に世界のSICを最大230億トン削減し,インドと中国に不均衡な影響を及ぼします.
- 土壌から内陸水域への無機炭素の年間損失は少なくとも13億±33億トンであった.
結論:
- この研究は,土壌の無機炭素 (SIC) 貯蔵量とその脆弱性に関する最初の包括的な世界的な見積もりを提供します.
- 将来の窒素堆積とそれに伴う土壌酸化は,土壌の炭素貯蔵に重大な脅威をもたらします.
- 大量の無機炭素が毎年内陸に流されることは 炭素循環の重要で過小評価されている要素です
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