Friday, February 1, 2013
Thursday, January 31, 2013
Bathymetry
Bathymetry project. by Tyree23 on GoAnimate
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1.what is it ? What's the difference between a bathymetric map and a topographic map ? The measurement of the depth of the water in ocean,rivers, or lakes . Bathymetric maps look alike like topographic maps which use lines to show the shape and elevation of land features . 2. How did oceanographers map the ocean floor in the past and what were the results ? In ancient times, scientist would conduct bathymetric measurements by throwing a heavy rope over the side of a ship and recording the length of rope it took to reach the seafloor. The measurements however were inaccurate and incomplete. 3. How do oceanographers map the oceans now, and how accurate and effective is this method ? Today scientist use echo sounders to make bathymetric measurements. The accuracy of these measurements is still limited.
4. Why are multibeam echo sounders so effective ?
Multibeam echo sounders feature hundreds of narrow beams that send out sound pulses. This array of pulses provides very high angular resolution .
5. What's an example of an underwater discovery that was made possible by multibeam echo sounders?
Multibeam echo sounders correct for the movements of the boat at sea, it provides information about the physical characteristics of a seafloor feature. They can indicate whether the feature is add of hard or soft sediments.
6.why do oceanographers map the oceans below the surface? Why is it important to society?
The US National Geophysical Data Canter And the International Hydrographic Organization, measure and archive bathymetric data. Their bathymetric measurements support safe navigation and protect marine environments around the globe. The NGDC creates digital elevation models that are used to simulate tsunamis.
Video Maker - Powered by GoAnimate.
1.what is it ? What's the difference between a bathymetric map and a topographic map ? The measurement of the depth of the water in ocean,rivers, or lakes . Bathymetric maps look alike like topographic maps which use lines to show the shape and elevation of land features . 2. How did oceanographers map the ocean floor in the past and what were the results ? In ancient times, scientist would conduct bathymetric measurements by throwing a heavy rope over the side of a ship and recording the length of rope it took to reach the seafloor. The measurements however were inaccurate and incomplete. 3. How do oceanographers map the oceans now, and how accurate and effective is this method ? Today scientist use echo sounders to make bathymetric measurements. The accuracy of these measurements is still limited.
4. Why are multibeam echo sounders so effective ?
Multibeam echo sounders feature hundreds of narrow beams that send out sound pulses. This array of pulses provides very high angular resolution .
5. What's an example of an underwater discovery that was made possible by multibeam echo sounders?
Multibeam echo sounders correct for the movements of the boat at sea, it provides information about the physical characteristics of a seafloor feature. They can indicate whether the feature is add of hard or soft sediments.
6.why do oceanographers map the oceans below the surface? Why is it important to society?
The US National Geophysical Data Canter And the International Hydrographic Organization, measure and archive bathymetric data. Their bathymetric measurements support safe navigation and protect marine environments around the globe. The NGDC creates digital elevation models that are used to simulate tsunamis.
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