This is part of Judith's series 'Climate Change'.
Judith : "Antarctic sea ice starts life as small frazil crystals forming on the surface of the water, which together form grease ice, so-called because they resemble an oil slick in the languid surface movement they cause on the water.
If the ocean is rough the crystals form into the pancake ice photographed here. These knock into each other causing the edges to rise (like pancakes).
Eventually the pancake ice consolidates into sheet ice, which continues to freeze and thicken through the winter. Sheet ice has a bright surface, and sunlight that strikes it is reflected back into space, reducing the amount of solar energy absorbed into the sea. Without sea ice, more solar energy is absorbed and temperatures rise further.
The formation of sea ice also affects the world’s ocean currents as salt is released on freezing, and the remaining denser, more saline water sinks, displacing the water below.
Furthermore, the algae that grow under sea ice are essential for krill, at the start of the ocean food chain.
This photograph is a silver gelatin print taken as part of an Arts Fellowship with the Australian Antarctic Division in 2005."