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Abyssal marine tectonics from the SWOT mission
Science ( IF 44.7 ) Pub Date : 2024-12-12 , DOI: 10.1126/science.ads4472
Yao Yu, David T. Sandwell, Gerald Dibarboure

The global ocean covers 71% of Earth’s surface, yet the seafloor is poorly charted compared with land, the Moon, Mars, and Venus. Traditional ocean mapping uses ship-based soundings and nadir satellite radar altimetry—one limited in spatial coverage and the other in spatial resolution. The joint NASA–CNES (Centre National d’Etudes Spatiales) Surface Water and Ocean Topography (SWOT) mission uses phase-coherent, wide-swath radar altimetry to measure ocean surface heights at high precision. We show that 1 year of SWOT data offers more detailed information than 30 years of satellite nadir altimetry in marine gravity, enabling the detection of intricate seafloor structures at 8-kilometer spatial resolution. With the mission still ongoing, SWOT promises critical insights for bathymetric charting, tectonic plate reconstruction, underwater navigation, and deep ocean mixing.

中文翻译:


SWOT 任务的深海海洋构造



全球海洋覆盖了地球表面的 71%,但与陆地、月球、火星和金星相比,海底的地图绘制得很糟糕。传统的海洋测绘使用基于船的探测和最低点卫星雷达测高 - 一个在空间覆盖范围上受到限制,另一个在空间分辨率上受到限制。NASA-CNES(国家空间研究中心)地表水和海洋地形 (SWOT) 联合任务使用相位相干、宽幅雷达测高仪来高精度测量海洋表面高度。我们表明,1 年的 SWOT 数据比 30 年的海洋重力卫星最低点测高提供了更详细的信息,能够以 8 公里的空间分辨率检测错综复杂的海底结构。由于任务仍在进行中,SWOT 有望为测深图、构造板块重建、水下导航和深海混合提供关键见解。
更新日期:2024-12-12
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