OCO-2は,太陽によるクロロフィルの光による宇宙からの光合成観測を進める
Y Sun1, C Frankenberg2,3, J D Wood4
1Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA. ys776@cornell.edu cfranken@caltech.edu.
Science (New York, N.Y.)
|October 14, 2017
まとめ
衛星による太陽光によるクロロフィル光 (SIF) は,総一次生産 (GPP) との強いグローバルな相関を示している. これは,地上GPPを監視し,炭素循環の動態を理解するための重要なツールとしてSIFを検証します.
科学分野:
- 地球科学
- エコロジー
- リモートセンシング
背景:
- 炭素循環の研究には,世界の原産総量 (GPP) の定量化が不可欠です.
- 太陽光によるクロロフィル光 (SIF) は,植物の光合成の直接的な測定値である.
- 衛星からの SIF と GPP の関係については,さらなる検証が必要である.
研究 の 目的:
- 軌道上の炭素観測所-2 (OCO-2) の SIF と GPP の間の空間時間的な対応を調査する.
- 地上GPPの監視のための衛星SIFの可能性を評価する.
- 異なるバイオームにおけるSIF-GPP関係の線形性を探求する.
主な方法:
- 高い空間解像度の OCO-2 SIF データを使用した.
- グローバルSIF-GPP対応のための経験的正交関数解析を使用しました.
- 地上および空中観測で検証された SIF-GPP 関連性
主要な成果:
- OCO-2 SIFとGPPの間の一貫した時空相関が示されています.
- 様々な渦巻き流域で SIF-GPP の線形関係を確立した.
- GPPの変動を追跡するSIFの可能性を強調した.
結論:
- 地上の炭素循環の研究を進めるためには,高品質の衛星 SIF データは不可欠です.
- SIFは,GPPの強力なモニタリングのための大きな希望を示しています.
- より広い範囲のバイオームでSIF-GPPの関係を確認するには,さらなる研究が必要です.
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