How Deep Is the Ocean?
摘要
How deep is the ocean? To find the answer to this question is not as simple as you may think. Ocean mapping technology has developed over time and there have been many advances like the invention of sonarSonar. But it is a fact that Mars is better mapped than of our own ocean floor. The search for the missing Malaysian Air Flight MH370 in the Indian Ocean illustrates how poorly our oceans are mapped. In this chapter we will learn how to take a piston corePiston core sample of the ocean floor and we will meet Maurice (Doc) EwingMaurice (Doc) Ewing and learn how he invented seismic profiling so that we could “see” the layers of rocks and sediment beneath the ocean floor. But all of our sonarsSonar and seismic systems make a lot of noise. How has this impacted on marine mammals and other ocean creatures?