New Zealand plate stack: New Zealand's Southern Alps run along almost the entire length of the country's South Island. In the bottom right of this picture you can see the peak of one of these 3,000m mountains. When the wind coming from the Pacific in the west hits them, it bounces off, causing clouds to become altocumulus lenticularis, a pile of plates shaped like the lens of an eye.
Sunset stratiformis: Altocumulus stratiformis floating idly over central England. A stratiformis is simply a horizontal layer of cloud. They float at a medium height, which can be from around 2438m to 6096m
In this picture, windflow at Robinson Crusoe island ? off the coast of Chile ? hits the island's edge (bottom left), causing the clouds about the islands to spin off in clockwise vortices to create this incredible satellite shot
The ash cloud from the Icelandic volcanic eruption is captured on a satellite image as it approached the UK.
The drifting ash from the volcano Grimsvotn, in the top left of the picture, was taken by Nasa's Terra satellite, has been published by Dundee University's Satellite Receiving Station.
The white cloud sitting over north west Scotland is a low pressure system which has brought high winds and heavy rain to many areas of Britain.
The winds were coming from a north-westerly direction, blowing anti-clockwise round the low pressure system, drawing the ash plume from the volcano towards the northern half of Britain.
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