大気と海洋の二酸化炭素データとモデルによって示唆される北米の大陸の大規模な炭素沈殿所
1S. Fan and J. Sarmiento, Atmospheric and Oceanic Sciences Program, Princeton University, Princeton, NJ 08544, USA. M. Gloor and S. Pacala, Department of Ecology and Evolutionary Biology, Princeton University, Princeton, NJ 08542, USA. J. Mahlm.
まとめ
地球上の陸上の生態系は,1988年から1992年の間に年間1.0~2.2ペタグラムの炭素を吸収した. 北米では二酸化炭素の吸収が大きく,ユーラシアとアフリカでは純交換がほとんどなかった.
科学分野:
- 地球システム科学 地球システム科学
- 大気化学 大気化学
- 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) の濃度は世界的に上昇しています.
- 陸上の炭素吸収源を理解することは,気候変動モデリングに不可欠です.
研究 の 目的:
- 地球上の地球上の二酸化炭素の吸収量を定量化するために.
- この地上の炭素吸収体の空間的分布を決定するために.
主な方法:
- 1988-1992年の大気中のCO2データを活用した.
- 2つの大気輸送モデルを使用しました.
- 化石燃料の排出量と海洋のCO2吸収の組み込まれた推定値.
主要な成果:
- 地球上の陸上の吸収量は,年間1.0〜2.2ペタグラムの炭素 (Pg C年-1) と推定された.
- 北米では,1.7 +/- 0.5 Pg C year-1.の有意な吸収を示した.
- ユーラシア・北アフリカでは吸収が弱い (0.1 +/- 0.6 Pg C year-1),その他の陸域は純供給源 (0.2 +/- 0.9 Pg C year-1) であった.
結論:
- 陸上の生態系は,大気中のCO2上昇を緩和する上で重要な役割を果たしています.
- 陸上の炭素吸収源の有効性については,地域によって大きな差異がある.
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