A Factor of 2 Improvement in Global Marine Gravity from Cryosat, Jason-1, and Envisat

Cryosat、Jason-1 和 Envisat 将全球海洋重力提高了 2 倍

• 批准号: 1128801
• 负责人: David Sandwell
• 金额: $ 22.92万
• 依托单位: University of California-San Diego Scripps Inst of Oceanography
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-02-15 至 2016-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1128801&HistoricalAwards=false
• 关键词: Factor; Improvement; Global; Marine; Gravity

Accurate and reliable, high-resolution seafloor bathymetry is essential to many aspects of oceanographic research. Global bathymetry is also used in many areas outside of the scientific community including: K-1 teaching of earth science and seafloor geography; undergraduate-level earth science and plate tectonics; law of the sea; US Naval operations; mineral exploration; planning of fiber-optic cable routing and general interest by the public. The global bathymetry map derived from satellite gravity by Sandwell?s group is now so widely used that it has become the public ?face of the deep? displayed by Google Earth. Over the next 3 to 5 years, a wealth of new marine gravity data will be provided by three currently operating satellite altimeters CryoSat, Jason-1, and Envisat. This project has the aim of using the new data to improve the accuracy of the global marine gravity field by at least a factor of two and in some areas a factor of four. Given the very wide use of satellite-derived bathymetry, the broader impacts of this work are both evident and profound.

准确、可靠、高分辨率的海底测深对于海洋学研究的许多方面至关重要。全球水深测量还用于科学界以外的许多领域，包括： K-1 地球科学和海底地理教学；本科水平的地球科学和板块构造学；海洋法；美国海军行动；矿产勘探——光纤电缆布线的规划和公众的普遍兴趣。桑德韦尔小组根据卫星重力绘制的全球测深图现已得到广泛使用，以至于它已成为公众的“深海面孔”。由 Google 地球显示。在未来 3 到 5 年内，目前运行的三颗卫星高度计 CryoSat、Jason-1 和 Envisat 将提供大量新的海洋重力数据。该项目的目标是利用新数据将全球海洋重力场的精度提高至少两倍，在某些地区提高四倍。鉴于卫星测深技术的广泛使用，这项工作的更广泛影响既明显又深远。