表面アルベドの減少による北極森林からの潜在的な炭素沈殿のオフセット
1Hadley Centre for Climate Prediction and Research, The Met Office, Bracknell, Berkshire, UK. rabetts@meto.gov.uk
Nature
|November 23, 2000
まとめ
植林により地球温暖化が増加する可能性があります. 新しい森林は表面アルベドを低くし,温暖化を引き起こし,特に北極地域では,炭素封じ込めの利点を取り消す可能性があります.
科学分野:
- 気候科学 気候科学
- エコロジー エコロジー エコロジー
- 大気科学 大気科学
背景:
- 森林化は,大気中の二酸化炭素を封じ込めることによって,気候変動を緩和するために提案されています.
- しかし,森林化は陸地表面のアルベドも変化させ,放射性フォッシングに影響を与えます.
- 森林化の純気候効果は,アルベドの変化に対する炭素吸収のバランスを取ることに依存しています.
研究 の 目的:
- 植林によるアルベドの変化による放射線強制をシミュレートするために.
- これらのフォッシングを炭素収束ポテンシャルと比較するために.
- 温帯地域と北極地域における森林化の気候への影響を評価する.
主な方法:
- 植林によるアルベドの変化に基づく放射線強制シミュレーション.
- 放射的強制を同等の炭素貯蔵量変化に変換する.
- 推定された炭素結合の可能性との比較.
主要な成果:
- 新生林における表面アルベドの減少は,陽性放射力作用を及ぼす.
- 多くの北極地域では,アルベドによる温暖化は,炭素収縮の恩恵を相殺できる.
- 高緯度の森林化は,気候変動を緩和する代わりに悪化させる可能性があります.
結論:
- 森林化のアルベド効果は,気候への影響の評価における重要な要因である.
- ボレア林は,アルベドの変化により,意図された気候変動の緩和を提供できない可能性があります.
- 効果的な気候変動緩和戦略を策定するには,地域アルベドの影響を慎重に検討する必要があります.
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