南洋の炭素吸収源の活性化
Peter Landschützer1, Nicolas Gruber2, F Alexander Haumann2
1Environmental Physics, Institute of Biogeochemistry and Pollutant Dynamics, ETH Zürich, Zürich, Switzerland.
まとめ
人為的な二酸化炭素 (CO2) の吸収に不可欠な南洋の炭素吸収槽は2002年以来,再び強くなっています. この重要な海洋の炭素貯蔵庫は 動的であり 10年ごとに変化します これは以前の仮定とは違います
科学分野:
- 海洋学
- 気候科学
- 炭素循環に関する研究
背景:
- 南洋は,人類による二酸化炭素 (CO2) の主要な海域である.
- この地域では 過去数十年にわたって 炭素の吸収が弱まっていることが 明らかになった.
- このCO2吸収のダイナミクスを理解することは 気候変動のモデル化に不可欠です
研究 の 目的:
- 南大洋の炭素吸収力の動向を分析するために
- 以前に観察された弱体化傾向が逆転したかどうかを判断する.
- 海洋の炭素循環の10年ごとに変化する要因を調査する.
主な方法:
- 海洋表面の二酸化炭素観測の多年分析
- 南洋の様々な地域における 炭素吸収力の評価
- 大気中のCO2の増加と循環パターンとの相関関係
主要な成果:
- 南洋の炭素吸収が弱まる傾向は2002年頃に停止した.
- 2012年までに 炭素吸収槽は 予想される強さまで回復し 大気中のCO2増加に合わせました
- 南洋の3つのセクターは,この回復に貢献し,大気循環に関連したセクター特有のプロセス変動がありました.
結論:
- 南洋の炭素吸収槽は 大きく回復しています
- 南洋の海洋炭素循環は,これまで理解していたよりも10年以上にわたり,よりダイナミックで変化しています.
- このダイナミックな振る舞いは 将来の気候予測と炭素予算の評価に 影響を及ぼします
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