MSGID: 1:317/3 63fcefd1   
   PID: hpt/lnx 1.9.0-cur 2019-01-08   
   TID: hpt/lnx 1.9.0-cur 2019-01-08   
   February 27, 2023 - Iceberg B22A adrift in Antarctica   
      
      Iceberg B221   
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      On February 18, 2023, clouds parted over the Amundsen Sea, allowing the   
      Moderate Resolution Imaging Spectroradiometer (MODIS) on board NASA’s   
      Aqua satellite to capture a true-color image of Iceberg B-22A adrift in   
      Antarctica.   
      
      In March 2002, a large iceberg broke away from the floating ice tongue   
      of the Thwaites glacier. It was given the name Iceberg B-22 and, at the   
      time that it detached, measured 85 kilometers (53 miles) long and 64   
      kilometers (40 miles) wide—about twice the size of Rhode Island. A few   
      sizable pieces broke off from the berg, and the main piece was renamed   
      B-22A. More than two decades later, on February 24, the U.S. National   
      Ice Center reports that B-22A hasn’t changed all that much, now   
      measuring 69.4 km (43.1 miles) by 44.4 km (27.6 miles).   
      
      While the iceberg is currently adrift, it still hasn’t moved far from   
      its birthplace. Shortly after breaking free of the Thwaites ice tongue,   
      B-22A became stuck, or “grounded” in a relatively shallow part of the   
      Amundsen Sea. On January 20, 2023, the European Union’s Earth   
      Observation Programme, Copernicus, estimated that B-22A had drifted a   
      total of 112 kilometers (69.6 miles), with 21 kilometers (13 miles)   
      occurring between December 2022 and January 2023.   
      
      Today’s image shows that Iceberg B-22A, floating in nearly ice-free   
      Antarctic water, has continued to drift to the northwest. The gap   
      between the iceberg and the glacial tongue appears to be widening, but   
      a single image can only give an impression of a single moment in time.   
      The NASA Worldview App follows the track of significant icebergs,   
      showing long-term motion. Using this tracker, which can be found   
       here, it becomes clear that the motion of Iceberg B-22A has, in   
      fact, accelerated over the past few months.   
      
      Image Facts   
      Satellite:  Aqua   
      Date Acquired: 2/19/2023   
      Resolutions:  1km (311.1 KB),  500m (876.8 KB),  250m (684.5   
      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=2023-02-27   
       
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