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All in a normal day for Mawson Station.. (Part 1 of 3)
Saturday 15th January 2000

Hello everybody..

At Mawson everyday everybody does a lot of things that in the course of their job could seem quite mundane, but in the context were we are they are very special. I thought I'd give you all a short peek into the a normal day's activities at Awesome Mawson.

As the summer approaches, the sea ice begins to melt and regular sea ice thickness monitoring must be performed. This involves using a ice corer to drill down into to ice and then using a tape measure to determine it's thickness. During winter most vehicles can be easily driven over the sea ice because the ice is 1 metre thick but as the ice melts a thickness below about 300mm means the Hagglunds cannot travel on the ice (their mass is about 4 tonnes), below about 150mm thickness quads and are banned and a bit thinner than that means no walking.


Colin & Wayne drilling a hole in the sea ice.
Twice a day at 5.15am and 5.15pm the "Met men" release a radiosonde which measures the wind speed, humidity, and air temperature above Mawson. The balloon is filled full of explosive Hydrogen gas which is why they wear "flash suits" to protect themselves in case it explodes. Hydrogen is used because it is easily manufactured - whereas Helium is very expensive and would require hundreds of gas bottles to be shipped down (and returned) each year.

The Met Men about to release a radiosonde.
Releasing a radiosonde in very high winds can be very interesting. The balloon usually heads out horizontally and just misses the top of the fuel farm (a row of tanks full of fuel). Many radiosondes have crashed into the tanks and become "fuel farm victims"!

A radiosonde (arrowed) heading out horizontally over the fuel farm


Email continues in part 2