[:ja]北極海の海氷面積は年々減少していることは頻繁に報道されていますが、季節変動で新しい氷は増減しますが、「古い」氷が薄くなり、温暖化によって氷の融解が加速する可能性が示唆されています。
この動画は1984~2016年までの氷の年次変化を示しています。白い部分が生まれてから5年以上経っている「古い」氷で、これが温暖化によって溶けやすくなっているとNASAの研究者がコメントしています。
参考文献： Arctic Sea Ice Is Losing Its Bulwark
ウェブ地球儀で地球俯瞰画像を見る： LiVEARTH
[Earthview Wonders][Video] No.120: Arctic Sea Ice
Decreasing sheath of Arctic Sea ice is frequently reported, but this NASA video reveals “older” ice is shrinking, possibility of accelerating the melting of Arctic ice.
This video shows timelapse change of Arctic Sea ice during 1984-2016. White area shows “older” ice that survived over 5 years, and this area is gradually decreasing its area.
Reference: Arctic Sea Ice Is Losing Its Bulwark
See earthview photo gallery with web-globe: LiVEARTH[:en][Earthview Wonders][Video] No.120: Arctic Sea Ice
Decreasing sheath of Arctic Sea ice is frequently reported, but this NASA video reveals “older” ice is shrinking, possibility of accelerating the melting of Arctic ice.
This video shows timelapse change of Arctic Sea ice during 1984-2016. White area shows “older” ice that survived over 5 years, and this area is gradually decreasing its area.
Reference: Arctic Sea Ice Is Losing Its Bulwark
See earthview photo gallery with web-globe: LiVEARTH[:]