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Interesting Atmospheric Effect from Aguille de la Tsa
© Jimmy O, Aug 2007
Camera used: Olympus FE110,X705
3*VOTING: number of votes 1

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USER COMMENTS
Can anyone explain the atmospheric effect going on here?
Jimmy O - 18/Nov/08
I don't really know, but it looks like two shadows. Th epointy one, that of the Tsa, the fainter one might be cloud, (purhaps high). Somehow more light being blocked by the tsa than the cloud. Maybe there was layers of cloud in the direction of the sun? Intresting
davefount - 18/Nov/08
btw: what time of day was it taken? Just looked again, and it is obviously not very early.
davefount - 18/Nov/08
Two suns
Blue Straggler - 18/Nov/08
http://www.ukclimbing.com/forums/t.php?t=329470
If the line of sight passes through 'unshadowed' regions next to the aguille then there will be backscatter creating the haze in the shadow of the ridge. In the direct shadow however there will be no backscatter and so it will appear darker.
Either that or a translucent ridge?
Jimmy O - 18/Nov/08
I think the bluish one is the shadow cast by the ridge on the bottom of the vally, whereas the dark triangular one is the shadow of the portion of the ridge where you were standing cast on the atmosphere particles (dust, vapour, etc), lit by the sun lying between you and the bottom of the valley. You can see the dark shadow only because of the bluish background. Similar to the shadow of a mountain at dawn or sunset. I guess ...
cado - 19/Nov/08
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