MSGID: 1:317/3 64417dca
PID: hpt/lnx 1.9.0-cur 2019-01-08
TID: hpt/lnx 1.9.0-cur 2019-01-08
April 20, 2023 - Contrails over Scandinavia

   Contrails over Scandinavia
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   The skies over Scandinavia were crisscrossed with condensation trails,
   each tracing the passage of aircraft, on April 18, 2023. The Moderate
   Resolution Imaging Spectroradiometer (MODIS) on board NASA’s Aqua
   satellite acquired this true-color image on that same day.

   High-altitude aircraft often leave behind condensation trails, or
   contrails, especially when flying through humid air. Contrails form in
   the wake of passing aircraft due to particles and water vapor contained
   in their exhaust. Airplane jet engines produce water vapor as they burn
   jet fuel. At high altitudes (above 20,000 feet), the air is so cold
   that the expelled vapor quickly condenses and freezes. In dry air,
   these ice crystals will undergo sublimation, changing directly from
   solid into a gas, leaving no visible trace. However, when the air is
   humid, long, linear cirrus clouds form along the track of the passing
   plane.

   In this image, a few contrails can be seen over Norway (upper left) and
   Sweden (upper right). In contrast, the skies over Denmark’s Jutland
   Peninsula as well as the waters of the Skagerrak between Denmark,
   Norway, and Sweden are thick with contrails. The city of Copenhagen,
   Denmark, is served by two airports, with the Copenhagen Kastrup Airport
   the busiest in Scandinavia. It serves 61 different airlines with
   flights heading to 121 different destinations.

   Image Facts
   Satellite:  Aqua
   Date Acquired: 4/18/2023
   Resolutions:  1km (350.6 KB),  500m (1.1 MB),  250m (2.9 MB)
   Bands Used: 1,4,3
   Image Credit: MODIS Land Rapid Response Team, NASA GSFC



https://modis.gsfc.nasa.gov/gallery/individual.php?db_date=2023-04-20
 
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