Global Seafloor Topography from Satellite Altimetry

David Sandwell, Walter Smith, University of California at San Diego-Scripps Institution for Oceanography, National Oceanic and Atmospheric Administration - Laboratory for Satellite Altimetry

Highlighted on this National Geophysical Data Center (NGDC) site is a new bathymetric map of the global seafloor derived from satellite altimetry. Although commonly described as a detailed map of the ocean floor, it is actually a preliminary map of global seafloor gravity anomalies. Its development combined ship depth soundings with satellite measurements of variations in sea surface height caused by the surface gravity fields of submarine geological features. The site affords various regional images derived from this technique as well as a global interactive map of seafloor and land relief. Also available are a few maps of land topography, including an interactive map of the earth's surface, which is composed of enlargable two-minute color relief images. Lastly, reports, articles, and links are provided on global sea floor topography as measured by satellite altimetry and ship depth soundings, bathymetric prediction and modeling, and marine gravity anomalies.

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Subject: Geoscience:Geology:Geophysics:Geodesy, Geoscience:Geology:Structural Geology, Geophysics:Exploration Methods, Geoscience:Oceanography
Grade Level: Graduate/Professional, College Lower (13-14), High School (9-12), College Upper (15-16)
Topics: Chemistry/Physics/Mathematics, Earth surface, Solid Earth:Structural Geology, Ocean
Theme: Teach the Earth:Course Topics:Structural Geology, Oceanography, Geodesy, GeophysicsKeywords: Gravity atlas, Relief images, Globes