Hriatzuala Sailo

Hriatzuala Sailo

Hriatzuala Sailo
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Punch Hole Clouds may appear as a circular or oval holes in a layer of supercooled clouds. Sometimes they assume a form of a perfect circle and persist for quite a long time, drifting together with the cloud layer. One explanation seems to blame the air traffic (the jet contrail intersections) combined with a thermal inversion (a circular motion of a rising warm air). (Image credit Joel Knain)

Punch Hole Clouds may appear as a circular or oval holes in a layer of supercooled clouds. Sometimes they assume a form of a perfect circle and persist for quite a long time, drifting together with the cloud layer. One explanation seems to blame the air traffic (the jet contrail intersections) combined with a thermal inversion (a circular motion of a rising warm air). (Image credit Joel Knain)