气候变暖导致格陵兰岛冰川上的冰雪融化,融化的水在坑洼处形成了这种宝石蓝颜色的湖。(图片来源:NASA)
Warmer weather melts snow and ice on Greenland's glaciers which collect in depressions on the surface to produce these sapphire-coloured ponds