地球規模での木炭の動員は,土壌からの溶解と河川による海洋への輸送を経由して起こります
Rudolf Jaffé1, Yan Ding, Jutta Niggemann
1Southeast Environmental Research Center, and Department of Chemistry and Biochemistry, Florida International University, Miami, FL 33199, USA. jaffer@fiu.edu
まとめ
毎年,世界中で大量の木炭が生産されています. この研究では,年間2600万トン以上の木炭が溶け,海に運ばれて,世界の炭素予算に影響を与えていると定量化しています.
科学分野:
- バイオジオケミストリー バイオジオケミストリー
- 環境科学 環境科学
- 土壌科学は,土壌科学である.
背景:
- 世界的なバイオマス燃焼は,毎年膨大な量の木炭を生産しています.
- この木炭の大部分は土壌や堆積物の中に長期間保存されています.
- 環境における木炭の運命を理解することは,炭素循環とジオエンジニアリングの評価に不可欠です.
研究 の 目的:
- 世界各地の河川における木炭の溶解産物を定量化するために.
- 土壌から海に運ばれる溶性木炭の世界の流れを推定する.
- 世界的な炭素予算における木炭溶解の役割と,溶解有機炭素 (DOC) との関連性を評価する.
主な方法:
- 世界各地から採取した河川水サンプルにおける木炭溶解産物の分析.
- 川の測定に基づいて,溶性木炭のグローバルフロースの定量化.
- 木炭の動員と土壌からのDOCの輸出のメカニズム的結合の調査.
主要な成果:
- 溶性木炭の海洋への世界的な流れは,年間2650万トン±180万トンと推定されています.
- この溶性炭流は,世界の河川溶解有機炭素 (DOC) 流量の約10%を占めています.
- 土壌からの木炭の動員は,DOCの動員とメカニズム的に関連しています.
結論:
- 木炭の溶解と輸送は,以前には定量化されていない土壌からの損失の重要な経路を表しています.
- この研究は,世界の木炭予算における重大なギャップを埋めています.
- 発見は,木炭を含むジオエンジニアリング戦略の有効性と影響を評価するために不可欠なデータを提供します.
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