As temperatures are low throughout the year and strong alpine winds prevail, while the ground is covered by gravel, conditions for survival are extremely harsh.
由於高度每增加一千公尺，氣溫約降低攝氏六度，因此在三千六百公尺的地方，氣溫比平地低二十餘度，終年處於低溫、加上高空強風吹襲，土地碎石遍佈，生存條件極為嚴酷。