Globe and Mail: The collapse of the massive ice sheet covering West Antarctica has always been one of the nightmare scenarios of global warming. So much water is locked away in the ice that if it were distributed evenly in the world’s oceans, it would raise sea levels by an average of five metres. But a Canadian-led research team has made an unusual discovery about what will happen if the ice melts: Not all coastlines of the world will be affected equally. Some lucky areas, notably in Southern …