gequbao.com
找歌就用歌曲宝
全球变暖 冰盖融化 - 英语听力
能正常播放的歌曲才可以下载
Glacial decline and the gradual loss of polar ice caps has been a worrying trend over recent decades, but scientists have been aware of an apparently curious anomaly with the Karakoram, which contains some of the world's biggest mountains including the second highest, K2. It has about 20,000 square kilometres of glaciers, accounting for 3% of the total area of ice outside the Antarctic and Greenland ice sheets. Now a team of French scientists has carried out a detailed survey over a large area of the range using sophisticated remote-sensing measurements. Writing in the scientific journal, Nature, they say they found that in the first years of this century the Karakoram's glaciers had actually expanded by a small amount, while in the neighbouring Himalayas they'd been shrinking. It's unclear why this is happening, but it seems that by a quirk in the weather pattern that's not fully understood, less heat is being delivered to the Karakoram and the mountains are receiving heavier falls of snow.
热门推荐