icesheet,bedsheet

greenland ice sheet collapse, triggered ancient sea level rise
p>劳伦冰盖(laurentia ice sheet)属于第四纪大冰盖,它的范围达到
p>劳伦冰盖(laurentia ice sheet)属于第四纪大冰盖,它的范围达到
camp on the greenland ice sheet
greenland ice sheet melting 'off the records' due