南洋の強い炭素吸収は空中観測で明らかである
Matthew C Long1, Britton B Stephens1, Kathryn McKain2,3
1National Center for Atmospheric Research, Boulder, CO, USA.
まとめ
南洋の二酸化炭素 (CO2) の吸収は,気候の調節に不可欠です. この研究では,大気中のCO2測定を用いて,年間0.53ペタグラムのCO2の純吸収を推定し,気候モデルを精製しました.
科学分野:
- 地球システム科学
- 大気化学
- 海洋学
背景:
- 南洋は,地球上の大気中の二酸化炭素 (CO2) レベルに大きな影響を与えている.
- この地域における空気と海の二酸化炭素の交換の現在の推定は,かなりの差異を示している.
研究 の 目的:
- 大気中の二酸化炭素のグラデーションを使って南洋の空気と海の二酸化炭素の交換を制限する.
- 南洋におけるCO2の純流量のより正確な見積もりを提供するためです.
主な方法:
- CO2の流れと水平および垂直の CO2のグラデーションを結びつけるために,大気の輸送モデルを使用した.
- 流量制限のための垂直大気CO2グラデーションの航空機ベースの測定.
- 2009~2018年における南緯45度以南の年間平均CO2流量
主要な成果:
- 南洋の年間平均CO2フローは年間0.53±0.23ペタグラム (純吸収量) と見積もられている.
- 結果は大気逆転の推定値と 海洋表面PCO2産物と一致しています
- 最近のプロファイリング・フロートデータによる解釈よりも強い年間平均CO2吸収を示しています.
結論:
- 航空機によるCO2グラデント測定は,南洋の空気-海CO2フロースの強固な制約を提供します.
- この研究は南大洋における炭素の蓄積の推定を 精査したものである.
- この発見は,地球規模の炭素循環における海洋の役割をよりよく理解するのに寄与しています.
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