Sastrugi, or zastrugi, are sharp irregular grooves or ridges formed on a snow surface by wind erosion. The ridges are markedly perpendicular to the prevailing winds; they are steep on the windward side, and sloping to the leeward side. After nearly three weeks traveling south from Hobart, the Aurora Australis is parked up on the edge of the sea ice, 100km from Casey base. Those working there throughout the summer are being ferried ashore by chopper. For the rest of us there is time to explore the surrounds, and enjoy the colours in the sky at night. This shot was taken around 3am with the sun low on the horizon. The colour in the sky is natural, and the only time i have witnessed anything like it.
Somewhere in the Southern Ocean