火星の極地層層の堆積物の軌道強制は,火星の極地層の堆積物の軌道強制である
Jacques Laskar1, Benjamin Levrard, John F Mustard
1Astronomie et Systèmes Dynamiques, IMC-CNRS UMR8028, 77 Av. Denfert-Rochereau, 75014 Paris, France. laskar@bdl.fr
Nature
|September 28, 2002
まとめ
火星 火星 火星 火星
科学分野:
- 惑星科学は惑星科学である.
- 気候科学 気候科学
- 地質学 地質学 地質学
背景:
- 火星の極地には,層層の地形がある.
- これらの層の形成は,火星の軌道気候強制に結びついていると仮定されています.
- 以前の堆積時間スケールの推定値は大きく異なっていた.
研究 の 目的:
- 火星の極層層の地形の堆積率を決定するために.
- 氷層の放射能とインソレーションの変動を相関させるため.
- 火星の気候の歴史に関する理解を深めるため.
主な方法:
- 高解像度の画像と火星の極地層の地形の地形を分析した.
- 火星の軌道と回転パラメータの計算を改訂しました.
- 氷層の放射を深さの関数として取得するための光度測定データ分析.
- 火星の北極でシミュレートされた太陽照射変動と比較.
主要な成果:
- 氷層の輝きと,火星の北極の夏の太陽照射の変動との間には,相関関係があることが判明した.
- この相関は,地球の古気候の研究に類似しています.
- 北極氷河の上部250mの平均堆積率は0.05cm/年 (−1) であった.
結論:
- この発見は,火星の極層形成と軌道気候強制との関連を裏付けている.
- この研究は,火星の極地氷のより正確な堆積率を提供します.
- この研究は,火星の気候の進化に関する私たちの理解を深めています.
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