大陸の河川の流出記録に直接の二酸化炭素効果の検出
1Met Office, Hadley Centre for Climate Prediction and Research (JCHMR), Maclean Building, Wallingford OX10 8BB, UK. nicola.gedney@metoffice.gov.uk
Nature
|February 17, 2006
まとめ
大陸の流れが増加したのは,大気中の二酸化炭素 (CO2) の上昇により,植物の発汗を抑制しているからです. この発見は,淡水利用可能性の予測に影響を及ぼし,陸上の生態系に直接的なCO2効果があることを明らかにしています.
科学分野:
- 環境科学 環境科学
- 気候科学 気候科学
- エコロジー エコロジー エコロジー
背景:
- 20世紀を通して大陸の流れが増加し,人間の水の使用量の増加と対照的に,大陸の流れが増加しました.
- 潜在的要因には,気候変動,森林破壊,太陽光暗くなり,大気中の二酸化炭素 (CO2) が植物に直接影響するなどがある.
- これらの要因は,降水と蒸発を変化させ,流出パターンに影響を与える可能性があります.
研究 の 目的:
- 大陸流出の観測された変化を,特定の寄与要因と結びつける.
- 気候の変動,森林伐採,太陽の暗くなり,CO2が植物に与える影響を調査する.
主な方法:
- 水力学的プロセスをシミュレートするために,機械的な陸地表面モデルを使用しました.
- 流出変化を割り当てるために最適な指紋統計技術を採用した.
- 気候に起因する年間間流出変動に対する検証されたモデルの性能.
主要な成果:
- 20世紀の気候傾向だけでは,観測された流出量の増加を説明することはできない.
- 流出傾向は,抑制された植物転出と一致することが判明しました.
- CO2誘発の口腔閉塞は,この抑制の主な要因として特定されました.
結論:
- 植物の透気に対するCO2の直接的な影響は,大陸の流れを大きく影響する.
- 将来の淡水利用可能性の予測は,これらの直接的なCO2インパクトを考慮する必要があります.
- この研究では,地上の生物圏の機能に直接的なCO2の影響を検出し,定量化しています.
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