bild

Typhoon. Colour-enhanced infrared NOAA satellite image of a typhoon (tropical cyclone) approaching the coast of Bangladesh in 1991. North is towards the top. The outline of the coast of Bangladesh is superimposed as fine white lines. This typhoon is colour-coded to cloud reflectance which relates to cloud density: red (high), through yellow, green to blue (low). Typhoons (like hurricanes) are huge, revolving, tropical storms in which ferocious winds over 200 km per hour spiral around a central, calm, low pressure area called the eye. Often accompanied by torrential rain, they can cause extensive damage when they cross land. (KEYSTONE/SCIENCE PHOTO LIBRARY/EARTH SATELLITE CORPORATION) === ===