Bootstrap Figure 3

Figure 3. Tie Point Plots
Figure 3. Scatterplots of vertically polarized 18 GHz and 37 GHz SMMR brightness temperatures for (a, left) entire Antarctic, (b, middle) Weddell, Indian, and Pacific sectors, and (c, right) Ross and Bellingshausen/Amundsen sectors.  Line AD represents the ice tie-point while O represents open water.  Ice between 0 and 100% lies on a line between O and AD.