水の補償効果は,年間地球上のCO2沈殿地の変化と温度を関連付けています
Martin Jung1, Markus Reichstein1,2, Christopher R Schwalm3
1Department of Biogeochemical Integration, Max Planck Institute for Biogeochemistry, 07745 Jena, Germany.
Nature
|January 17, 2017
まとめ
地元の炭素の吸収と呼吸は 水の利用が左右されますが 温度の変動が世界の炭素循環の変動を左右します このパラドックスを説明する補償効果は,気候
科学分野:
- 地球システム科学
- エコロジー
- 気候科学
背景:
- 大気中の二酸化炭素の増加率は,主に土地の生態系による炭素吸収によって変動しています.
- 土地の生態系における炭素のバランスを制御する上で,温度と水資源の正確な役割は,スケールによって不明のままです.
研究 の 目的:
- 温度と水資源の総生産性 (GPP),陸上生態系呼吸 (TER),および純生態系交換 (NEE) への影響を調査する.
- 地元と世界の炭素バランスの変動に対する気候変数の影響を区別する.
主な方法:
- エディ・コヴァリアンスデータに基づく 経験的モデルを用いた.
- 生態系の反応をシミュレートするためにプロセスベースのモデルを使用しました.
- 地元と世界のスケールでデータを分析した.
主要な成果:
- GPPとTERの地域間の変動の主な要因は,水の利用可能性でした.
- 世界的なNEEの変動の主な要因は気温の変動でした.
- 地元と空間のスケールでの水利用の補償効果は,水と気温の異なる影響を調和させました.
結論:
- 空間的な気候の共変,特に気温は,世界の炭素循環反応に大きく影響します.
- 陸上の炭素バランスの変動を調整する温度と水の相対的な重要性に関する矛盾した報告を調和させた.
- 生態系の炭素動態を調節する際に水と気温の複雑な相互作用を強調した.
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