There is one graphic output available with the HAF product. It is a shaded half-channel conditions display. The half-channel conditions are indicated by the vertical shading: clear no; heavy yes. See figure 9-8.

Figure 9-8.-A shaded half-channel conditions display.

SOUND CHANNEL AXIS DEPTH

LEARNING OBJECTIVES: Recognize subsurface oceanographic features conducive to deep and shallow channel conditions. Evaluate deep sound channel axis (DSC) and shallow sound channel axis (SSX) depth products. Identify the graphic and tabular outputs of each.

In this section we will discuss both the deep and shallow channel axis products. First, lets look at the deep sound channel axis.

DEEP SOUND CHANNEL AXIS DEPTH (DSC)

A deep sound channel occurs when the deep sea is warm on top and cold below. The surface-warming effect is not sufficient to extend all the way to the bottom and is limited to the upper part of the water column, below which it forms the main thermocline. The main thermocline exhibits a decrease in temperature at a moderately rapid rate with depth. Below the main thermocline, the sea is nearly isothermal about 38F) and therefore has a positive sound speed gradient due to the effects of pressure.

This information is now available on CD in Adobe PDF Printable Format

Privacy Statement - Press Release - Copyright Information. - Contact Us - Support Integrated Publishing