まとめ
衛星画像は,南極の氷河のユニークな特徴を明らかにし,正確で費用対効果の高い氷の速度測定を可能にします. この方法は,氷河の動態を理解するための貴重なデータを提供します.
科学分野:
- 氷河学 氷河学とは
- リモートセンシング (リモートセンサー)
- 地球観測 地球観測
背景:
- 南極の氷河流と出口の氷河は,その接地ゾーンの下には,明確な流れと亀裂の特徴を示しています.
- これらの特徴は,氷とともに移動し,しばしば長年にわたって持続します.
研究 の 目的:
- 氷の速度を測定するためのLandsat衛星画像の有用性を評価する.
- 衛星による測定が地上データと相関するかどうかを判断する.
主な方法:
- ランドサット画像を用いて,特徴的な流れと亀裂の特徴を特定し,追跡する.
- これらの特徴のタイムラップ分析を使用して,氷の動きを測定します.
- 衛星からの速度を地上および空からの観測で比較して検証する.
主要な成果:
- 南極の氷河の特徴的な流れと亀裂の特徴は,Landsat画像で見られ,追跡できます.
- これらの特徴のタイムラップス測定は,氷の速度に関するデータを提供します.
- バード氷河のランドサット画像から得られた速度は,地上および空からの観測と良好な一致を示しています.
結論:
- 衛星画像,特にLandsatは,氷河の流れと出口氷河の速度を測定するための迅速で費用対効果の高い方法を提供します.
- このテクニックは,平均速度,特に氷河の末尾付近で,第一級の精度を提供します.
- この方法は,南極の氷の動態を大規模にモニタリングする上で価値があります.
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