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General Weather/Earth Sciences Topics => Weather Photography => Topic started by: dupreezd on March 21, 2018, 09:32:52 AM

Title: Vapor trail casting shadow.
Post by: dupreezd on March 21, 2018, 09:32:52 AM

Early this morning with a low sun angle resulting in a vapor trail casting a shadow on the cloud above.

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Title: Re: Vapor trail casting shadow.
Post by: waiukuweather on March 21, 2018, 02:48:50 PM

I dont think that is a shadow
the sun would need to below the horizon for that to occur
(as it does not match very well either )
instead I think they are so close together, the vapour trail has caused evaporation of the cirrus cloud above it (possibly due to a slight warming of the air from the jet exhaust)

Title: Re: Vapor trail casting shadow.
Post by: miraculon on March 21, 2018, 04:04:22 PM

This article might be of interest: https://journals.ametsoc.org/doi/pdf/10.1175/2009BAMS2905.1 (https://journals.ametsoc.org/doi/pdf/10.1175/2009BAMS2905.1)

Greg H.

Title: Re: Vapor trail casting shadow.
Post by: dupreezd on March 21, 2018, 07:46:04 PM

Thanks guys, very interesting info in that article.
Never knew a prop plane can have a vapor trail.

Title: Re: Vapor trail casting shadow.
Post by: CW2274 on March 21, 2018, 07:51:09 PM

Quote from: dupreezd on March 21, 2018, 07:46:04 PM

Never knew a prop plane can have a vapor trail.

https://en.wikipedia.org/wiki/Turboprop

Title: Re: Vapor trail casting shadow.
Post by: miraculon on March 22, 2018, 08:20:26 AM

Quote from: dupreezd on March 21, 2018, 07:46:04 PM

Thanks guys, very interesting info in that article.
Never knew a prop plane can have a vapor trail.

I have seen other photos of B-17s during WWII showing vapor trails.

Greg H.

Title: Re: Vapor trail casting shadow.
Post by: DaleReid on March 22, 2018, 09:44:36 AM

This is a huge mural at the Smithsonian.  Very breathtaking to see in person.  Ferris painted it.

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Title: Re: Vapor trail casting shadow.
Post by: Randall Kayfes on March 23, 2018, 12:22:35 PM

Greetings, fantastic post and supporting articles - thank you all!

Randall