南洋の飽和度 最近の気候変動により,CO2が沈んでいく
Corinne Le Quéré1, Christian Rödenbeck, Erik T Buitenhuis
1Max Planck Institut für Biogeochemie, Postfach 100164, D-07701 Jena, Germany. c.lequere@uea.ac.uk
Science (New York, N.Y.)
|May 19, 2007
まとめ
南極海とは 南極海のこと.
科学分野:
- 気候科学 気候科学
- 海洋学 海洋学 海洋学
- 大気化学 大気化学
背景:
- 南大洋は,世界の炭素循環において重要な役割を果たしています.
- 大気中の二酸化炭素 (CO2) レベルは,人間の活動によって上昇しています.
- 海洋が二酸化炭素を吸収する能力を理解することは,気候変動モデリングに不可欠です.
研究 の 目的:
- 南大洋の二酸化炭素 (CO2) 沈殿地の変化を定量化するために.
- 南洋の風力増加が二酸化炭素吸収に与える影響を調査する.
- 南洋のCO2シンクの将来の効率を予測する.
主な方法:
- 観測された大気中のCO2濃度を利用した.
- CO2フクロスを推定するために逆の方法を使用しました.
- 南洋の風の動向と,二酸化炭素吸収との相関を分析した.
主要な成果:
- 南大洋の二酸化炭素吸収は,1981年から2004年の間に10年ごとに年間0.08ペタグラムの炭素で弱まった.
- この弱まりは,人間の活動によって引き起こされる南洋風の増加に起因する.
- 将来の予測は,南洋の風の継続的な増加を示しています.
結論:
- 南洋のCO2シンクの効率は短期的に低下しています.
- この弱まりは,何世紀にもわたって大気中のCO2の安定化につながる可能性があります.
- 人為的な風力パターンの変化は,海洋の炭素吸収に大きく影響を与えます.
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