Altostratus (As)

One of the 10 characteristic cloud types (or cloud genera) recognised by the International Cloud Atlas. Its name comes from altum (height) and stratus (spread out). It appears as a greyish or bluish sheet of cloud, partly or totally covering the sky, but with parts sufficiently thin to at least vaguely reveal the sun.

Larsen C: Giant iceberg breaks off Antarctic peninsula

On 12th July, satellite data confirmed the ‘calving’ of a trillion-tonne, 5,800 sq km iceberg – one of the largest icebergs on record, more than a quarter the size of Wales - from the Larsen C ice shelf on the Antarctic peninsula.

Larsen C ice shelf - a floating mass of ice hundreds of meters thick which is attached to a huge, grounded ice sheet - is now 12% smaller in area than before the split and is at its lowest extend ever recorded, ultimately dramatically changing the Antarctic landscape.  It follows previous collapses of Larsen A ice shelf in 1995 and Larsen B in 2002.