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“鹦鹉螺”号和“鳐鱼”号都是在7～8月份北极的夏季前往北极的,自然条件相对良好,日平均气温为-1℃。然而,冬季的北极日平均气温则低于-60℃,并且寒风刺骨,黑夜永驻。辽阔无垠的荒原上,偶尔能看到一点黯淡的月光。在如此冰冷的北极找到冰裂,比夏季不知要困难多少。还有,冬季的北极冰裂缝隙中的水面,有一层薄冰覆盖,其厚度有多大?潜艇从那里上浮时,能否撞开?艇体会否受到损伤?咨询北极专家得知,冬季在北极生活的鲸也经常需要冲撞冰层上浮水面呼吸新鲜空
Both the Nautilus and the Tuna fish travel to the North Pole in the summer of July and August, with relatively good natural conditions and an average daily temperature of -1 ° C. However, the average daily mean temperature of the Arctic in winter is below -60 ° C, and the wind is cold and dusk. On the vast expanse of the wilderness, you can occasionally see a dim moonlight. Found in such a cold Arctic crack, I do not know how much more difficult than in summer. Also, in winter Arctic ice cracks in the water surface, a layer of thin ice covered, the thickness of how much? Submarine floating up from there, can break open? Hull will be damaged? Consult Arctic experts learned that the winter in the Arctic Living whales also often need to bump into the ice and float freshly into the water