MSGID: 1:317/3 6432fd4a
PID: hpt/lnx 1.9.0-cur 2019-01-08
TID: hpt/lnx 1.9.0-cur 2019-01-08
April 9, 2023 - Contrails Crisscross the Iberian Peninsula

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   Long streaks of cloud crisscrossed the skies over the Iberian Peninsula
   on April 7, 2023. The Moderate Resolution Imaging Spectroradiometer
   (MODIS) on board NASA’s Terra satellite acquired a true-color image of
   the complex pattern on that same day.

   The streaks are a type of cirrus cloud known as a “contrail”. Cirrus
   clouds typically form in the sky when humidity is high, but contrails
   form in the wake of passing aircraft due to particles and water vapor
   contained in their exhaust. The temperature and humidity of the air
   affects how long contrails last. When air is dry, contrails last just
   seconds or minutes. But when the air is humid, contrails can be
   long-lived. Young, freshly formed contrails appear like neat line, with
   sharp and distinct sides. As contrails age, they spread outward until
   they become difficult to distinguish from naturally occurring cirrus
   clouds.

   The complex set of contrails captured in this image are a mix of both
   young and older contrails that have formed in the wake of many
   different aircraft. Near the right side of the image, a few thin lines
   stretch from the northeast to the southwest, marking the youngest
   contrails. The majority, however, are older and appear as thick gray
   lines over the North Atlantic and passing over the coast of Spain. A
   group of fuzzy cloud-like areas located inland are likely older
   contrails, while broad swaths of white over the North Atlantic are
   banks of clouds.

   Image Facts
   Satellite:  Terra
   Date Acquired: 4/7/2023
   Resolutions:  1km (274.3 KB),  500m (670.1 KB),  250m (455.6
   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=2023-04-09
 
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