MSGID: 1:317/3 629cef2f   
   PID: hpt/lnx 1.9.0-cur 2019-01-08   
   TID: hpt/lnx 1.9.0-cur 2019-01-08   
   June 5, 2022 - Volga River Delta   
      
      Volga River Delta   
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      As the mighty Volga River—the largest river in Europe—meets the waters   
      of the Caspian Sea, the rushing river slows dramatically, splitting   
      into about 1,000 tangled channels and spreading out over an area of   
      more than 20,000 square kilometers (7,700 square miles) to create the   
      largest delta in Europe. The Volga delta is also one of the   
      lowest-lying large river delta on Earth, sitting near 27 meters (88.5   
      feet) below sea level in the Caspian Depression. Part of the Volga   
      Delta is actually submerged as much as 2.5 meters (8 feet) below the   
      saline waters of the Caspian Sea. The complex structure creates a vast   
      and unique ecosystem that, among other things, supports an amazing   
      array of migratory and breeding bird species, including several   
      threatened and endangered species.   
      
      On June 2, 2022, the Moderate Resolution Imaging Spectroradiometer   
      (MODIS) on board NASA’s Terra satellite acquired a true-color image of   
      the Volga River Delta. The many tangled, tree-like channels create an   
      area of rich green near the edge of the waters of the Caspian Sea.   
      Muddy streaks can be seen extending from the edge well offshore, where   
      the tan mixes with green-tinted water of the Caspian Sea.   
      
      The green tint is likely a combination of sediment and phytoplankton.   
      Sediment appears muddy tan when it floats near the surface, as can be   
      seen in near-shore waters. As it sinks below the surface, the   
      reflectivity changes and so does the color as seen from space. Sinking   
      sediment appears various shades of green. Large quantities of   
      phytoplankton, which are microscopic chlorophyl-containing organisms,   
      can also impart shades of green to the surface of sea water.   
      
      Image Facts   
      Satellite:  Terra   
      Date Acquired: 6/2/2022   
      Resolutions:  1km (130.5 KB),  500m (330.9 KB),  250m (733.9   
      KB)   
      Bands Used: 1,4,3   
      Image Credit: MODIS Land Rapid Response Team, NASA GSFC   
      
      
      
   https://modis.gsfc.nasa.gov/gallery/individual.php?db_date=2022-06-05   
       
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