Compared with sea level, every 1,000 meters in altitude means 10 % less oxygen in the atmosphere. Lake Tsui is at an elevation of 3,540 meters and the oxygen content of the air is only 65 % of that at sea level.
與平地相比，高度每升高一千公尺，空氣中的氧氣量就減少百分之十，翠池標高三五四○公尺，空氣中的含氧量只有平地的百分之六十五。