世界最大島，正在緩緩飄走……

美國《地球物理學研究雜志·大地》近期刊發的一項新研究顯示，受全球變暖等因素影響，格陵蘭島面積“縮水”，同時緩慢向西北方向漂移。

As climate change hits the Arctic with accelerating speed, Greenland is "shrinking" in size.

New research from DTU Space, published in the Journal of Geophysical Research: Solid Earth, says the Danish territory is being "twisted, compressed and stretched" while also slowly drifting northwest.

這是3月20日拍攝的丹麥自治領地格陵蘭島首府努克一角（無人機照片）。圖源：新華社

丹麥技術大學等機構的研究人員利用格陵蘭島附近58個全球導航衛星系統監測站的數據，研究了格陵蘭島的整體位置、基巖的海拔以及島嶼面積等的變化。研究顯示，格陵蘭島越來越多地受到扭曲、壓力和張力的影響，這是由板塊構造和基巖運動造成，而基巖運動是由其上部的大型冰蓋融化和地下壓力減少等因素引起的。

研究還顯示，過去20年，整個格陵蘭島以每年約2厘米的速度向西北方向漂移。這些復雜的運動使格陵蘭島在水平方向上出現擴張和收縮，導致格陵蘭島的面積發生改變，在某些區域被拉伸，還有一些區域被“擠壓在一起”。總體來看，格陵蘭島變得更小。

The phenomenon is occurring due to plate tectonics and movements in the bedrock, which is caused by the large ice sheets on top melting and "reducing pressure on the subsurface".

Researchers say these movements are making Greenland expand and contract horizontally, meaning some regions are being "stretched out" and getting larger, while other parts are being "pulled together".

DTU Space researcher and lead author Danjal Longfors Berg says overall this means Greenland is getting smaller - but this could change in the future with the "accelerating melt we're seeing now".

The study, which produced measurements based on 58 GNSS stations around Greenland, also found that the entire island has moved northwest over the past two decades by about 2 centimetres each year.

格陵蘭島冰蓋是全球最豐富的淡水資源之一，儲存的水量相當于可致全球海平面上升7.4米。據歐盟氣候監測機構哥白尼氣候變化服務局測算，海平面每上升1厘米，全球就會有約600萬人面臨海岸洪災風險。研究人員表示，近年來全球氣候變暖加速導致格陵蘭島冰蓋大量消融，這一變化不僅影響格陵蘭島，也威脅人類和全球自然環境。

來源 ：新華國際頭條 Euronews

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