衛星によって測定された地球のアルベドの変化
Bruce A Wielicki1, Takmeng Wong, Norman Loeb
1NASA Langley Research Center, 21 Langley Boulevard, Hampton, VA 23681, USA. b.a.wielicki@nasa.gov
まとめ
NASAの衛星データによると,地球のアルベドは,過去4年間,自然の変動範囲にとどまっている. これは,以前の月からの観測と矛盾しており,気候の傾向を検出するためにより長い衛星記録の必要性を強調しています.
科学分野:
- 地球科学 地球科学 地球科学
- 気候科学 気候科学
- 衛星リモートセンシング.
背景:
- 地球のアルベド (宇宙に反射する太陽放射線の比率) は,気候の重要な指標である.
- 地色観測を用いた以前の研究では,アルベドの有意な増加が示唆されていた.
研究 の 目的:
- 地球のアルベドに関するNASAの地球衛星データを分析するために.
- 衛星観測と地球照明によるアルベドの変化を比較する.
- 気候の変動性における地球のアルベドの現在の状態を評価する.
主な方法:
- NASAの地球衛星データを活用して,地球のアルベドを測定した.
- 4年間の衛星観測を分析した.
- 月の地球光観測から推論されたアルベドの変化と比較した結果.
主要な成果:
- 最近の衛星データは,地球のアルベドが自然な変動範囲にあることを示しています.
- 過去4年間に観測されたアルベドの変化は,アースシャインデータで示唆された6%の上昇を裏付けていません.
- 衛星の記録は,現在,アルベドの長期的な気候の傾向を明確に特定するには短すぎます.
結論:
- 現在のNASAの衛星データは,以前推論された地球のアルベドの増加を裏付けていません.
- 拡張された衛星観測記録は,地球のアルベドの強力な気候傾向分析のために必要である.
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