新华社伦敦1月21日电 全球变暖会导致海平面上升，但不是像给浴缸加水那样水面一致上升。英国 《自然-通讯》杂志20日发表的一项新研究说，尽管格陵兰岛冰盖融化会导致全球海平面上升，但由于 冰盖质量减轻后，其下方陆地会回弹抬升，这反而将使格陵兰岛周边出现区域性海平面下降。 这项研究中，美国哥伦比亚大学等机构参与的国际团队将"冰川均衡调整"模型与海平面和垂直地壳运动 观测数据相结合，以预测格陵兰岛地区未来海平面变化。研究显示，到本世纪末，格陵兰岛周边海平面 可能将下降1米至近4米。 长久以来，科学家认为地球的地壳可以在人类的时间尺度内发生小幅回弹，地壳之下地幔的起伏则要在 数千年的时间尺度上才会显著显现。但全球定位系统对格陵兰岛基岩的测量显示，该岛正在抬升，表明 当冰盖缩小时，地幔流动速度比预期要快得多，这个原认为"长期"的过程在几十年内就发生了。研究人 员发现，当将地幔流动纳入预测模型，到本世纪末，格陵兰岛周边海平面下降的幅度将比传统模型预测 的超出25%至65%。 据研究人员解释，格陵兰岛冰盖的质量变化是导致其周边海平面下降的主因。格陵兰岛冰盖面积约为美 国得克萨斯州的三倍，一些地方厚度超过3千米。巨大的冰盖挤 ...

Core Insights - A recent study indicates that Greenland is shrinking in size and drifting slowly northwest due to global warming and other factors [1][3] Group 1: Research Findings - The study, conducted by researchers from the Technical University of Denmark and published in the journal "Geophysical Research Letters," analyzed data from 58 global navigation satellite system monitoring stations around Greenland [3] - Greenland is drifting northwest at a rate of approximately 2 centimeters per year, with some areas experiencing uplift while others are sinking [3] - The horizontal crustal movement in Greenland is influenced by three geological forces: tectonic plate interactions, reduced pressure on the bedrock due to glacial melting, and long-term rebound from the last ice age [3] Group 2: Climate Impact - The movement of Greenland highlights how climate change-induced glacial melting is reshaping the surface and affecting geological foundations [3] - Greenland's ice sheet is one of the world's largest freshwater resources, with enough water to potentially raise global sea levels by 7.4 meters [3] - According to the Copernicus Climate Change Service, a 1-centimeter rise in sea level puts approximately 6 million people at risk of coastal flooding globally [3]

Core Insights - A recent study indicates that Greenland is shrinking in size and drifting slowly northwest due to global warming and other factors [1][3] Group 1: Research Findings - The study, conducted by researchers from the Technical University of Denmark and published in the journal "Geophysical Research Letters," analyzed data from 58 global navigation satellite system monitoring stations around Greenland [3] - Greenland is drifting northwest at a rate of approximately 2 centimeters per year, with some areas experiencing uplift while others are sinking [3] - The horizontal crustal movement in Greenland is influenced by three geological forces: tectonic plate interactions, reduced pressure on the bedrock due to glacier melting, and long-term rebound from the last ice age [3] Group 2: Climate Impact - The movement of Greenland highlights how climate change-induced glacier melting is reshaping the surface and affecting geological foundations [3] - Greenland's ice sheet is one of the world's largest freshwater resources, with enough water to potentially raise global sea levels by 7.4 meters [3] - According to the Copernicus Climate Change Service, a 1-centimeter rise in sea level puts approximately 6 million people at risk of coastal flooding globally [3]