Greenland Surface Velocities and Flow Features From High Resolution Visible Statellite Imagery

高分辨率可见卫星图像的格陵兰表面速度和流动特征

• 批准号: 9911981
• 负责人: Cornelis van der Veen
• 金额: $ 23.95万
• 依托单位: Ohio State University Research Foundation -DO NOT USE
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-06-01 至 2004-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9911981&HistoricalAwards=false
• 关键词: Greenland; Surface; Velocities; Flow; Features

AbstractVanderVeenOPP-9911981The Principal Investigator will obtain surface velocities of outlet glaciers in eastern Greenland by using high-resolution (34 m pixel size) declassified intelligence satellite photographs (DISP) from 1963 to 1968. The velocities and visible surface features will provide an early baseline for detection of ice-sheet changes. For selected glaciers, the results will be used to describe the pattern of flow and to determine the dominat stress using the force-budget method where the data permit. The DISP images are only available on film, with each film covering a nominal area of 10.6 X 144.8 nautical miles. They will acquire nearly 600 films and assess their quality and glaciological interest, scan and digtize selected films. Those images that are suitable such as those with few clouds and high radiometric resolution will be used for automated frature tracking to obtain velocities. All films will be archived with a short description of each. Velocities obtained from the DISP will be compared with those derived from Synthetic Aperture Radar (SAR) interferomery. If there are large differences, the Principal Investigator will work with SAR scientists to identify the discrepancies.

主要研究者将利用1963年至1968年的高分辨率（34 m像素大小）解密情报卫星照片（DISP）获得格陵兰东部出口冰川的表面速度。速度和可见的表面特征将为探测冰盖变化提供早期基线。对于选定的冰川，其结果将被用来描述流动的模式，并在数据允许的情况下使用力预算方法来确定主导应力。DISP的图像只能在胶片上提供，每张胶片的标称面积为10.6X144.8海里。他们将获得近600部电影，并评估其质量和冰川学兴趣，扫描和数字化选定的电影。那些合适的图像，如那些云少，辐射分辨率高，将用于自动骨折跟踪，以获得速度。所有影片将存档，并附有简短的说明。从DISP获得的速度将与来自合成孔径雷达（SAR）干涉。如果存在较大差异，主要研究者将与SAR科学家合作确定差异。