大気中の二酸化炭素データから推定された中国の大陸の炭素吸収場

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大気中の二酸化炭素データから推定された中国の大陸の炭素吸収場

Jing Wang^1,2,3,4, Liang Feng^3,4, Paul I Palmer^5,6

¹Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China.

Nature

|October 29, 2020

まとめ

中国

科学分野:

地球と環境科学
気候科学
エコロジー

背景:

地球の気温上昇は二酸化炭素の排出量削減と土地の炭素吸収源の強化を求めています
中国は世界最大のCO2排出国であり,2017年の世界の排出量の約27%を占めている.
稀少なデータは,中国の陸上生物圏のCO2フローの広範な見積もりにつながりました.

研究の目的:

最近の大気中のCO2データを用いて中国の陸上生物圏の炭素吸収量を定量化します.
中国の人為的な排出量への土地沈殿地の貢献を評価する.
以前は過小評価されていた重要な炭素吸収地域を特定するためです

主な方法:

中国全土の6か所 (2009年−2016年) の大気中のCO2モル分数のデータ分析.
中国の大陸生物圏の炭素吸収量の推定
中国人のCO2排出量との推定シンクの比較

主要な成果:

中国の陸上生物圏の平均沈殿量は,年間1.11±0.38ペタグラム (2010年−2016年) と見積もられている.
この水槽は,調査期間中,中国の年間の人為的な排出量の約45%を占めています.
中国南西部では年中,北東部では夏季に重要な炭素吸収場が確認された.

結論:

中国の大陸の生物圏は炭素を大量に吸収し炭素の排出を部分的に相殺しています
急速な植林,特に急速に成長する植林は,土地の炭素吸収量の増加を促しています.
植物の緑化が強化され,衛星観測が支持され,森林化地域における土地の炭素吸収が増加していることが証明されています.

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