These satellite observations show two views of California, one at visible wavelengths (left) and one in the infrared (right) similiar to those AIRS will take. Clouds, snow and other cold objects that appear bright in the visible light image look dark when seen in infrared. Conversely, warmer areas are brighter red or white. Because infrared measurements look at heat, instead of visible light, researchers can take measurements 24 hours a day instead of relying on daylight. Click to enlarge.
