Scientists believe the Arctic sea ice, or the floating ice cover of the Arctic Ocean, has reached its minimum extent for the year, shrinking to the second lowest extent since record-keeping began in 1978.
원문출처 : https://www.cnn.com/2020/09/21/us/arctic-sea-ice-shrunk-minimum-extent-2020-scn-trnd/index.html
원문출처 : https://www.cnn.com/2020/09/21/us/arctic-sea-ice-shrunk-minimum-extent-2020-scn-trnd/index.html