トランスピレーションの推定における不確実性
A M J Coenders-Gerrits1, R J van der Ent1, T A Bogaard1
1Water Resources Section, Delft University of Technology, Stevinweg 1, 2628 CN Delft, The Netherlands.
Nature
|February 14, 2014
まとめ
植物の透き通る過程
科学分野:
- 水文学 水文学とは,水文学の学問である.
- エコロジー エコロジー エコロジー
- 気候科学 気候科学
背景:
- 他の源 (例えば,土壌,水体,天蓋の遮断) から発生する蒸発と,植物による透析の相対的な貢献が,世界の水循環に与える影響は,長年にわたる議論である.
- Jasechko et al. を含む以前の研究 (2013年) は,土地の蒸発における透析の重要な役割を提唱した.
- 正確な定量化は,陸地と大気の相互作用を理解し,気候モデルを改善するために不可欠です.
研究 の 目的:
- Jasechko et al.が推定した世界的な透気比を批判的に評価する. (2013年) に発表された.
- 植物の透析が,土地の全蒸発に与える影響を再評価する.
- データ選択と不確実性の定量化が水文学的見積もりに与える影響を強調する.
主な方法:
- 代替の入力データセットを考慮して,地球全体の蒸発データの再分析.
- 水文学的測定に関連する不確実性の保守的な会計. 水文学的測定に関連する不確実性の保守的な会計.
- 修正されたトランスピレーション推定値と既存の気候モデルの出力値の比較.
主要な成果:
- 推定の世界的な透析比は,代替データと保守的な不確実性評価を適用すると,大幅に減少し,35-80%に拡大します.
- この改訂された範囲は,当初提案された80〜90%と比較して,透気の支配的な役割が低いことを示唆しています.
- この調査結果は,観測データと気候モデルの仮定の間の不一致の可能性を示唆している.
結論:
- 植物の透析の世界的な重要性には,より包括的な採集面積スケールデータによるさらなる調査が必要である.
- 水文学的測定における不確実性の軽減は,観測データと気候モデル予測の調和にするために不可欠です.
- 世界的な水循環と陸地と大気のフィードバックに関する理解を洗練するために,継続的な研究が必要です.
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