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Sound speed is affected by the oceanographic variables of temperature, salinity, and pressure. We can look at the effect of each of these variables on the sound speed by focusing on one spot in the oc
Sound speed is affected by the oceanographic variables of temperature, salinity, and pressure. We can look at the effect of each of these variables on the sound speed by focusing on one spot in the ocean. When oceanographers look at the change of an oceanographic variable with water depth, they call it a profile. Similar to the profile of your face, which gives a side view of your face, an oceanographic profile gives you a side view of the ocean at one location from top to bottom. It looks at how that characteristic of the ocean changes as you go from the sea surface straight down to the seafloor.
Three line graphs, an x-axis increasing from left to right and an y-axis showing depth increasing top to bottom. First graph shows temperature in celcius moving from top-right to bottom-left in a zig-zag with x-axis of 2 to 20. Second graph shows salinity (ppt) moving from top-left to bottom-right in straight line with x-axis of 34 to 35. Third graph shows pressure (atm) moving from top-left to bottom-right in straight line with x-axis of 0 to 500
Displayed above are the basic profiles for a site in the deep, open ocean roughly halfway between the equator and the North or South Pole. In these profiles, temperature decreases as the water gets deeper while salinity and pressure increase with water depth. Here we are referring to the ocean pressure due to the weight of the overlying water (equilibrium pressure), not to the pressure associated with a sound wave, which is much, much smaller. In general, temperature usually decreases with depth, salinity can either increase or decrease with depth, and pressure always increases with depth.
What do you think happens to the speed of sound based on the temperature, salinity, and pressure profiles depicted above? (i dont expect like a full paragraph but if someone could point me in the right direction that would be nice)
