Rick Kohrs (firstname.lastname@example.org) colored the image as follows. He used a threshold temperature to determine which pixels in the image corresponded to clouds. He then removed the cloud pixels from consideration. Since the temperatures over land and sea overlap, he used a base map to separate the remaining pixels into sea and land groups. At this point he had three partial images: (a) clouds, (b) unclouded sea, and (c) unclouded land. Based on temperatures he colored each of these separately using an appropriate fraction of the total number of cells available in an 8-bit color map. The combined image you see here uses the whole set of 256 colors.
Rick Kohrs email@example.com DaviD W. Sanderson firstname.lastname@example.org Space Science and Engineering Center University of Wisconsin-Madison
(Image Credit: Space Science and Engineering Center, University of Wisconsin-Madison, Richard Kohrs, designer)