"植物の光合成に対するCO2の肥料化効果の最近の世界的な減少"に関するコメント
Zaichun Zhu1, Hui Zeng1, Ranga B Myneni2
1Peking University Shenzhen Graduate School, Peking University, Shenzhen 518055, Guangdong, China.
まとめ
最近の調査
科学分野:
- エコロジー
- 気候変動科学
- リモートセンシング
背景:
- CO2の受精効果 (CFE) は,世界の炭素循環を理解するために不可欠です.
- 以前の研究では1982年から2015年の間に 世界的にCFEが著しく減少したと示唆されていました
- 生態系モデルは この減少を過小評価することに 関与していた.
研究 の 目的:
- 報告されたCO2受精効果の低下を再評価する.
- 衛星データ処理と分析方法における潜在的なエラーを特定する.
- 衛星によるCFEと生態系モデルのシミュレーションを比較する.
主な方法:
- 衛星からの植生データ分析
- 衛星データを再処理し,アーティファクトを修正する.
- エコシステムモデルの出力と修正された衛星データの比較
- CFEの推論と比較に使用された方法の評価
主要な成果:
- 報告されたCO2受精効果の大幅な減少は人工物です.
- 誤った衛星データ処理により 誤った結論に至った.
- CFEを導出し比較するために使用された方法は問題がありました.
- この文脈における生態系モデルのパフォーマンスは再評価が必要である.
結論:
- ワングらによって報告された二酸化炭素受精効果の世界的減少. 修正されたデータには裏付けがない.
- データの処理と分析の方法論的な欠陥は,正確なCFEの傾向を覆しました.
- CFEのダイナミクスを理解するには,強力な方法論を用いたさらなる研究が必要です.
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