Bathymetry: Mapping the Sea Floor

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Presentation transcript:

Bathymetry: Mapping the Sea Floor So why do we map the sea floor? What do we want to know (2 general things)? 1

Multi-beam SONAR Swath Click on this image to run the animation. http://www.nauticalcharts.noaa.gov/staff/docs/Multibeam_720@24fps-300Kbps.mov The swath of the beam is equal to 3 times the depth being mapped. E.g., if you are multi-beam mapping at 1,000 feet deep, the swath of soundings would be 3,000 feet wide. http://www.nauticalcharts.noaa.gov/staff/docs/Multibeam_720@24fps-300Kbps.mov 3

Deploying Side-Scan SONAR 4

Multi-Beam SONAR 5

Seamounts off New England False color map

Hudson Canyon 7

Hudson Valley, NY 8

Alderdice Bank Gulf of Mexico 9

Galapagos Rift Spreading Center 10

MATCH THE 3-D BATHYMETRIC MAP with Its raw data A: Hudson Canyon B: Blake Ridge C: Loihi Seamount

Hudson Canyon

Blake Ridge

Loihi Volcano Bathymetric map of Hawaii’s youngest volcano off the southeastern coast of the Big Island of Hawaii 14

Loihi Seamount 15