世界最大岛，正在缓缓飘走……

美国《地球物理学研究杂志·大地》近期刊发的一项新研究显示，受全球变暖等因素影响，格陵兰岛面积“缩水”，同时缓慢向西北方向漂移。

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.

这是3月20日拍摄的丹麦自治领地格陵兰岛首府努克一角（无人机照片）。图源：新华社

丹麦技术大学等机构的研究人员利用格陵兰岛附近58个全球导航卫星系统监测站的数据，研究了格陵兰岛的整体位置、基岩的海拔以及岛屿面积等的变化。研究显示，格陵兰岛越来越多地受到扭曲、压力和张力的影响，这是由板块构造和基岩运动造成，而基岩运动是由其上部的大型冰盖融化和地下压力减少等因素引起的。

研究还显示，过去20年，整个格陵兰岛以每年约2厘米的速度向西北方向漂移。这些复杂的运动使格陵兰岛在水平方向上出现扩张和收缩，导致格陵兰岛的面积发生改变，在某些区域被拉伸，还有一些区域被“挤压在一起”。总体来看，格陵兰岛变得更小。

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.

格陵兰岛冰盖是全球最丰富的淡水资源之一，储存的水量相当于可致全球海平面上升7.4米。据欧盟气候监测机构哥白尼气候变化服务局测算，海平面每上升1厘米，全球就会有约600万人面临海岸洪灾风险。研究人员表示，近年来全球气候变暖加速导致格陵兰岛冰盖大量消融，这一变化不仅影响格陵兰岛，也威胁人类和全球自然环境。

来源 ：新华国际头条 Euronews

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