MSGID: 1:317/3 637d0e5c   
   PID: hpt/lnx 1.9.0-cur 2019-01-08   
   TID: hpt/lnx 1.9.0-cur 2019-01-08   
    EPOD - a service of USRA   
      
   The Earth Science Picture of the Day (EPOD) highlights the diverse processes   
   and phenomena which shape our planet and our lives. EPOD will collect and   
   archive photos, imagery, graphics, and artwork with short explanatory   
   captions and links exemplifying features within the Earth system. The   
   community is invited to contribute digital imagery, short captions and   
   relevant links.   
      
      
    Dust Devils on a Dry Lakebed   
      
      November 22, 2022   
      
      
       Dust-devils   
      Photographer:  Dale Chadwick   
      Summary Author:  Dale Chadwick   
      The photo above shows  dust devils on a dry lakebed southwest of   
      Winnemucca, Nevada, as observed in the early afternoon of July 4, 2022.   
      I was about 2 to 3 miles (3-5 km) away from when I noticed dust and   
      sand swirling in the air. The largest of these devils appears to be   
      over 100 feet (30 m) high and perhaps 30 feet (9 m) in width. I was   
      surprised at how long they persisted -- visible for at least 10   
      minutes.   
      
       Dust devils occur when the surface becomes sufficiently heated to   
      form a weak  updraft in the lower atmosphere, just above the ground.   
      Once formed, the little rotating column of air may twist   
      counterclockwise or clockwise and is typically barely strong enough to   
      lift grains of sand.   
      
      Photo details: Two views taken with a 300MM zoom lens.   
      
      Winnemucca, Nevada Coordinates:   
      
      
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   Atmospheric Effects Links   
      
        *  Atmospheric Optics   
        *  Optic Picture of Day: Gruppo Astrofili Galileo Galilei   
        *  Color and Light in Nature   
        *  The Colors of Twillight and Sunset   
        *  Refraction Index   
        *  Image Gallery: Atmospheric Effects   
        *  What is a Rainbow?   
      
   -   
      Earth Science Picture of the Day is a service of the  Universities   
      Space Research Association.   
      
   https://epod.usra.edu   
       
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