SWOTミッションからの深海構造
Yao Yu1, David T Sandwell1, Gerald Dibarboure2
1Scripps Institution of Oceanography, University of California San Diego, La Jolla, CA, USA.
まとめ
地表水と海洋の地形 (SWOT) 衛星ミッションは海底の地図作成に革命をもたらしました 1年間のSWOTデータは 海底の複雑な詳細を明らかにし 何十年にもわたる海洋探査の 伝統的な方法を上回ります
科学分野:
- 海洋学
- 地理学
- リモートセンシング
背景:
- 地球と他の惑星の表面と比較して,地球上の海底はほとんど地図化されていない.
- 船舶による測量やナディル衛星高度測定などの伝統的な海洋地図作成方法は, 範囲と解像度に制限があります.
研究 の 目的:
- 地表水と海洋地形 (SWOT) ミッションの詳細な海底情報提供能力を評価する.
- SWOTデータの有効性を,海重力と水位測定の過去の衛星データと比較する.
主な方法:
- NASAとCNESの共同SWOTミッションによる 段階一貫した広範囲レーダー高度測定を用いて
- 1年間のSWOTデータを分析して 海洋重力情報を導き出し 海底構造を検出します
- SWOTで得られたデータを 30年間のナディール衛星高度測定データと比較する.
主要な成果:
- SWOTデータは30年間のナディール高度測定よりもはるかに詳細な海洋重力情報を提供します.
- 複雑な海底構造は 1年間のSWOTデータを使って 8キロの空間解像度で検出できます
- SWOTミッションは進行中であり,海洋データセットを継続的に強化しています.
結論:
- SWOTデータは海底の地形と海洋重力に関する 前例のない洞察力を提供します
- このミッションはバチメトリカルチャート, プレート調査,水中ナビゲーションを 大きく進歩させようとしています
- SWOTデータは深海の混合プロセスを理解するのに不可欠です.
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