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Published on Apr 15, 2012
Shortly after 4:20, when you can see a large cirrus cloud with falling crystals, a jet flies south (on the west side of the cirrus) and the contrail quickly dissipates. It looks like the jet is above the cirrus but it's difficult (impossible) to really tell. Regardless, the contrail is forming and dissipating in an environment different from the cirrus. One where persistence and growth of the cloud is impossible.
After 5:35 waves develop on the southward moving cirrus and persist for about an hour. There is considerable interaction with the eastward flowing layer beneath.
This is the view looking north from the Science Building at the University of Victoria (UVic) on southern Vancouver Island, British Columbia, Canada. April 14, 2012.