海洋による人類によるCO2吸収は,世界のクロロフルオロカーボンデータセットに基づいています
Ben I McNeil1, Richard J Matear, Robert M Key
1Atmospheric and Oceanic Science Program, Princeton University, Princeton, NJ 08544, USA.
Science (New York, N.Y.)
|January 11, 2003
まとめ
海洋は,人為的な二酸化炭素 (CO2) を大量に吸収し,1980-1989年と1990-1999年の間にそれぞれ14.8ペタグラムと17.9ペタグラムを貯蔵しました. これは,多くの海洋モデルが予測するよりも高いCO2吸収を示しています.
科学分野:
- 海洋学 海洋学 海洋学
- 気候科学 気候科学
- バイオジオケミストリー バイオジオケミストリー
背景:
- 人為的な二酸化炭素 (CO2) 排出は,世界の炭素サイクルに大きく影響する.
- 海洋のCO2吸収の正確な推定は,気候変動を理解するために不可欠です.
- 海洋のCO2在庫を定量化するための以前の方法には,限界があります.
研究 の 目的:
- 1980年から1999年までの人為的なCO2の海洋在庫を推定する.
- 人為的な炭素の10年間の海洋の純吸収を決定する.
- 推定された海洋CO2吸収を,海洋一般循環モデルからの予測と比較する.
主な方法:
- グローバルクロロフルオロカーボン (CFC) データセットに基づいた技術を使用しました.
- 海洋における二十年間にわたる二酸化炭素の蓄積を分析した.
- 海洋による二酸化炭素の年間純吸収量を計算した.
主要な成果:
- 海は,1980年半ばから1989年半ばまで14.8ペタグラムの人類による炭素を貯蔵した.
- 海は1990年半ばから1999年半ばまで,人為的な炭素の17.9ペタグラムを貯蔵した.
- 海洋全体での純吸収率は,それぞれ10年間,年間1.6および2.0 +/- 0.4ペタグラムの炭素と推定された.
結論:
- この研究は,溶解性によって引き起こされる人類によるCO2の海への流れの上限を示している.
- 結果は,多くの海洋一般循環モデルが,人類による海洋CO2吸収を過大評価していることを示唆している.
- この研究は,大気中のCO2レベルを軽減する海洋の役割についての私たちの理解を洗練します.
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