tiabunna's photos with the keyword: meteorological

From an old slide. The old meteorological office had been converted to the Met store room: here with the year's supply of stores yet to be packed away. The sign says "No standing any time, Taxis excepted".

From an old slide. Mawson was one of the last major Australian observing stations to receive a wind-finding radar. This is a WF2 with a range of about 200km, being installed in its protective radome in February 1967.

From an old 1966 slide and from a set moved from the 'other' site. We were knocked over by those clouds behind the meteorological office. They are Nacreous Clouds, also known as "Mother of Pearl" clouds because of their colours or, more currently, as "Polar Stratospheric Clouds". They are made of ice crystals (which give their colour) and are about 20,000 metres high with temperatures dropping to about -80 C. They had always been considered quite rare and I believe our sighting was one of the first confirmed in Antarctica: there have been numerous sightings since.. Ozone depletion caused by chlorofluorocarbon gases has caused the polar stratosphere to become colder in spring (ozone keeps it warmer, so less ozone ie "the ozone hole" means lower temperatures) - yes, this is relevant to climate change. View on black. And HFF!

From an old slide, taken not long after arrival. That's a slightly younger (and slightly out of focus) me standing near the old meteorological office (at that stage used as a store), with new supply boxes still strewn around. This was taken very early in the morning, with the first light colouring the thin cloud and an impressive wall of drifting snow in the distance beyond the Casey Range (itself some 30km away). The scene here is almost identical to that largely blotted out by drifting snow in the earlier "blizzard" shot.