Ama Dablam, Winter Ascent. A South Korean expedition composed of three climbers made a remarkably rapid winter ascent of Ama Dablam. They were away from Kathmandu for only 15 days! They used no Sherpas. Three camps were established on the south ridge. On December 5 the leader Nam Sun-Woo reached the summit, followed the next day by Lim Byung-Kil and Kim Young- Soo.