Soil Moisture and Drought

Soil Moisture and Drought
  • Credit:

    Susan Byrne, NASA GSFC

Soil moisture plays an important role in preventing or prolonging summer droughts. When the ground is wet, water evaporates as the day warms up. The warm, moist air rises until it encounters colder air high above the Earth's surface, leading to afternoon rainshowers. The water remains in the ground through the cool night, and the cycle repeats the next day. For more information, see Dry Times in North America.

Images & Animations


File Dimensions

  • QuickTime 2 MB
  • QuickTime 9 MB
  • QuickTime 204 MB
NASA - National Aeronautics and Space Administration