Easter Ross sky looking picture perfect this morning
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ALISON Taylor snapped this beautiful sky over Tain this morning.
According to the Met Office, nacreous clouds are rare and very high clouds, known mainly for the coloured light they reflect after sunset and before sunrise.
The colours are reminiscent of the colours which reflect from a thin layer of oil on top of water, an effect known as iridescence.
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Because of the very low temperatures required, nacreous clouds are usually only visible from the UK when the cold air which circulates around polar regions in the stratosphere – known as the stratospheric polar vortex – is displaced and hovers temporarily over the UK.
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