having your data centre in a region where the outside air is cold means you can get rid of excess heat, but severe winter weather can then pose its own problems http://arstechnica.com/business/2012/04/coolest-jobs-in-tech-literally-running-a-south-pole-data-center/
snippet: You might not think that cooling would be a problem in one of the coldest places on Earth. But ironically, it’s a big concern. “You had to be careful about when you could do maintenance,” Gitt says. “At the South Pole Station, there are times we couldn’t crack open equipment bays because the equipment would start to crack from the cold.” At other times, electronic equipment would actually overheat because it had been designed for cold weather.
