I saw a cool movie on Antarctica last night. It dealt with a phenomenon called katabatic winds. I know we almost always have wind here. Calm wind is an anomaly and now I know why. A katabatic wind is generated by the flow of air down a slope (like a glacier) in an area subject to radiational cooling (like the South Pole). It results in high velocity winds flowing out from the South Pole. The wind in many cases reaches hurricane force blowing snow grains so hard it feels like pins being pushed into any exposed skin. It causes erosion of rock and carves the snow and ice into amazing natural sculptures. It also makes for great movies of penguins hunkered down against its onslaught. The flow is so strong that it affects weather over the entire surface of the earth.
The temperature at the South Pole dipped to 42 below zero centigrade yesterday. When it gets to 50 below flight operations are suspended for the year so each day now there is an urgency to get the last supplies and personnel to the Pole. Then we begin to cleanup pack up and get ready to get the rest of us out of McMurdo. I think the winter over folks have a big celebration the day they see the last C17 leave for the year.
