Jade Iceberg with Lone Adélie Penguin
Jeff Miller
Typically white or blue, some icebergs are a remarkable jade green. New research suggests that the green colour may be due to iron-oxide minerals in seawater freezing to the bottom of some ice shelves. Glacial ice flowing off Antarctica forms floating ice shelves. Seawater freezes to the bottom of an ice shelf, forming marine ice. If this marine ice contains large enough concentrations of red or yellow material (iron-oxide or rust), when combined with the blue of the glacial ice, the resulting colour (i.e. the wavelength of least absorption) is green. [Penguin is on the slope to the far right].
BEAKER STREET SCIENCE PHOTOGRAPHY PRIZE
This photograph was a finalist in Beaker Street’s annual Science Photography Prize. This highly-respected prize invites all Tasmanians to showcase the wonders of our extraordinary part of the world — which is teeming with science and scientists. Finalist images are displayed at the Tasmanian Museum and Art Gallery during Beaker Street Festival each August, with great prizes on offer for Judges’ and People’s Choice winners.
The Beaker Street Science Photography Prize would not be possible without the support of Full Gamut, Tasmania’s premier fine art printers and long-time sponsor of this competition. Many thanks also go to Pennicott Wilderness Journeys, which donates a generous prize for the People’s Choice winner.
