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Updated: Jul 12, 2026

09:05
Measurements of CO2 Fluxes at Non-Ideal Eddy Covariance Sites
Published on: June 24, 2019
まとめ
陸上の生態系は,かなりの量の二酸化炭素 (CO2) を吸収し,主要なシンクとして作用します. この研究は,海洋が化石燃料のCO2排出量の主要なシンクではないことを示しています.
科学分野:
- 大気化学 大気化学
- 海洋学 海洋学 海洋学
- エコロジー エコロジー エコロジー
背景:
- 大気中の二酸化炭素 (CO2) 濃度と海洋部分圧力は,世界の炭素循環の重要な指標である.
- 二酸化炭素の発生源と吸収源を理解することは,気候変動研究にとって極めて重要です.
- 以前の研究では,CO2吸収における海洋と陸上の生態系の役割が強調されています.
研究 の 目的:
- 世界的に重要な大気中の二酸化炭素 (CO2) の発生源と吸収源を特定する.
- 大気中のCO2濃度と海洋部分圧力データを一致させるため.
- CO2吸収に対する陸上の生態系と海洋の相対的な貢献を決定する.
主な方法:
- 観測された大気中のCO2濃度と,表面の海洋部分圧の組み合わせた分析.
- 大気輸送をシミュレートするために一般循環モデル (GCM) を利用しました.
- モデルから派生した境界層濃度と,さまざまなソースシンク分布の観測データとを比較した.
主要な成果:
- 大気中の二酸化炭素濃度が南北方向に大きく変化していることが観測されました.
- モデルシミュレーションでは,観測されたグラデントを維持するために,二酸化炭素の吸収は北半球でより大きくなければならないことが示されました.
- 北半球における海洋によるCO2の吸収は,化石燃料の排出を考慮するのに不十分であった.
結論:
- 地球上の生態系は,大気中のCO2を吸収する主要なシンクとして重要な役割を果たしています.
- 海洋は,化石燃料に由来するCO2の主な吸収源ではない.
- 人為的なCO2の大部分は,陸上の生態系によって吸収されます.
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