THERE IS NO LONGITUDE at the South Pole. Its lone coordinate is 90° South. From here, every direction is north. East and west come into play, technically, as soon as one steps away from the actual geographic pole, but such coordinates are without meaning here, they’re too difficult to imagine. People orient each other outside by referring to the wind, as in “upwind of that research hut,” or to the movement of the polar ice, as in “just downstream of that front loader.”
