备注请放最後面 违者新闻文章删除 1.媒体来源: 外媒 sciencealert 2.记者署名: Michelle Starr 3.完整新闻标题: Giant Gravity Anomaly Under Antarctica Is Getting Stronger, Scientists Reveal 科学家揭示：南极洲下方的巨大重力异常正在增强 4.完整新闻内文: Giant Gravity Anomaly Under Antarctica Is Getting Stronger, Scientists Reveal Nature 19 February 2026 By Michelle Starr https://i.urusai.cc/IQYuz.jpg Giant Gravity Anomaly Under Antarctica Is Getting Stronger, Scientists Reveal The Antarctic Geoid Low. (GReD) Although Earth is approximately spherical, its gravity field doesn't adhere to the same geometry. In visualizations, it more closely resembles a potato, with bumps and divots. One of the strongest of these depressions – where the gravity field is weaker – lies under Antarctica. Now, new models of how the so-called Antarctic Geoid Low evolved over time have shown that it's only getting stronger, driven by the long, slow movement of rock deep below Earth's surface, like a giant shifting in its sleep. 科学家揭示：南极洲下方的巨大重力异常正在增强 自然 2026年2月19日 经过米歇尔·斯塔尔 科学家揭示：南极洲下方的巨大重力异常正在增强 南极大水准面低点 （GReD） 虽然地球近似球形，但它的引力场并不遵循同样的几何形状。在可视化图中，它更像一个 马铃薯，表面凹凸不平。 在这些低洼地带中，重力场较弱的地带之一位於南极洲下方。如今，关於所谓「南极大水 准面低洼地带」随时间演变的新模型表明，它正变得越来越强，这是由地球深处岩石缓慢 而漫长的运动驱动的，就像一个沉睡的巨人在翻身。 "If we can better understand how Earth's interior shapes gravity and sea levels, we gain insight into factors that may matter for the growth and stability of large ice sheets," says geophysicist Alessandro Forte of the University of Florida. Earth's geoid – the bumpy potato shape of the gravitational field – is uneven because gravity is linked to mass, and the mass distribution inside the planet is uneven, due to different rock compositions having different densities. 「如果我们能够更好地了解地球内部如何塑造重力和海平面，我们就能深入了解可能对大 型冰盖的增长和稳定性产生重要影响的因素，」佛罗里达大学地球物理学家亚历山德罗· 福特说。 地球的大地水准面—重力场凹凸不平的马铃薯形状—是不均匀的，因为重力与质量有 关，而地球内部的质量分布不均匀，这是由於不同岩石成分的密度不同造成的。 https://youtu.be/iCptIGM1cg8 It's not a huge difference that you'd notice at the surface. Maps tend to exaggerate it so we can see what's going on; if you weighed yourself at a geoid low and a geoid high, the difference would be just a few grams. Nevertheless, the geoid represents a window into processes deep inside Earth that we can't observe directly. Forte and his colleague, geophysicist Petar Gliviof the Paris Institute of Earth Physics in France, generated a detailed map of the Antarctic Geoid Low using another window into Earth's interior: earthquakes. Seismic waves from earthquakes travel through the planet, changing speed and direction as they encounter materials with different compositions and densities. "Imagine doing a CT scan of the whole Earth, but we don't have X-rays like we do in a medical office," Forte explains. "We have earthquakes. Earthquake waves provide the 'light' that illuminates the interior of the planet." 表面上看，这种差别并不大。地图往往会夸大这种差别，以便我们能看清地形；如果你分 别在大地水准面低点和高点称重，差别可能只有几克。 然而，大地水准面为我们了解地球内部我们无法直接观测到的过程提供了一个窗口。 福特和他的同事，法国巴黎地球物理研究所的地球物理学家彼得·格利索维奇，利用地球 内部的另一个窗口—地震，绘制了一幅南极大水准面低洼区的详细地图。地震产生的地震 波在地球上传播，遇到不同成分和密度的物质时，其速度和方向都会改变。 「想像一下对整个地球进行CT扫描，但我们没有像诊所里那样的X光设备，」福特解释。 “我们依靠的是地震。地震波提供的‘光’照亮了地球内部。” Using the earthquake data, the researchers constructed a 3D density model of Earth's mantle and extrapolated it into a new map of the entire planetary geoid. They compared this map with the gold-standard gravity data collected by satellites and found it to be a close match. That was the easy part. The next step was to try to turn back the clock to assess how the geoid has evolved since the early Cenozoic, 70 million years ago. Forte and Glivifed their map into a physics-based model of Earth's mantle convection, rewinding Earth's interior geological activity to see how the geoid evolved over that timeframe. Then, from their starting point, they let the model run forward to see if it could reproduce the geoid we see today. 研究人员利用地震资料建构了地球地函的三维密度模型，并将其外推绘制成一张全新的行 星大地水准面图。他们将这张地图与卫星收集的黄金标准重力数据进行了比较，发现两者 高度吻合。 那只是最简单的部分。下一步是尝试追溯时间，评估自新生代早期（7000万年前）以来大 地水准面的演进过程。 Forte 和 Glivi将他们的地图输入到基於物理的地球地函对流模型中，回溯地球内 部的地质活动，以观察大地水准面在该时间段内的演变情况。 然後，他们从起点出发，让模型向前运行，看看它是否能够重现我们今天看到的地球大地 水准面。 They also checked whether their model reproduced real changes in Earth's rotational axis known as True Polar Wander. It arrived at the current geoid and matched the polar wander, suggesting it also provides an accurate representation of the geoid's evolution. The results showed that the Antarctic Geoid Low is not a new development; a gravitational depression has been sitting near Antarctica for at least 70 million years. But it hasn't remained static. About 50 million years ago, its position and strength started to change dramatically – timing that matches a sharp bend in the polar wander. According to the model, the anomaly formed as tectonic slabs subducted beneath Antarctica and sank deep into the mantle, altering the planet's gravity field at the surface. Meanwhile, a broad region of hot, buoyant material rose upward, becoming more influential over the past 40 million years and strengthening the geoid low. 他们也检验了他们的模型是否能重现地球自转轴的真实变化，也就是真极移。结果显示， 该模型推导出了当前的大地水准面，并且与极移相符，这表明它也能准确地描述大地水准 面的演变过程。 研究结果表明，南极大水准面低洼地带并非新近形成；至少在7,000万年前，南极附近就 一直存在着一个重力 低洼区。但它并非一成不变。大约5000万年前，它的位置和强度开 始剧烈变化—这个时间点与极移的急剧变化相吻合。 根据该模型，这种异常现象的形成是由於构造板块俯冲到南极洲下方并沉入地函深处，改 变了地表的重力场。同时，一大片高温高浮力物质向上上升，在过去4000万年中影响力不 断增强，并强化了大地水准面低洼区域。 Interestingly, this may be linked to the glaciation of Antarctica, which began in earnest around 34 million years ago. It's only a speculative link, but here's the interesting thing about the geoid: it shapes sea level. So, as the geoid shifted downward around Antarctica, the local sea surface would have lowered with it – potentially influencing the growth of the ice sheet. That's obviously a hypothesis that requires further testing. However, the work does show that different geodynamic processes, from mantle convection to the geoid to the motion of the poles, can all be connected and influence each other. The gravity hole under Antarctica may be subtle, but it is a reminder that even the slowest processes deep inside Earth can leave a lasting impression on the world above. The research has been published in Scientific Reports. 有趣的是，这可能与南极洲的冰川作用有关，南极洲的冰川作用大约始於3,400万年前。 这只是一个推测性的联系，但大地水准面的一个有趣之处在於：它会影响海平面。因此， 当南极洲周围的大地水准面向下移动时，当地的海平面也会随之下降——这可能影响了冰 盖的成长。 这显然是一个需要进一步验证的假设。然而，这项研究确实表明，从地函对流到大地水准 面再到极点运动，不同的地球动力学过程都可以相互连结并相互影响。 南极洲下方的重力空洞可能很细微，但它提醒我们，即使是地球深处最缓慢的过程，也能 对地上世界留下持久的影响。 这项研究成果已发表在《科学报告》。 5.完整新闻连结 (或短网址)不可用YAHOO、LINE、MSN等转载媒体: https://reurl.cc/GGW8j3 6.备注: IT'S OVER https://i.urusai.cc/Hdylt.jpg ADAM RUINED EVERYTHING 礼成奏乐 https://youtu.be/AuJgbOQqjK8 顺带一提，2026年2月17日（农历正月初一）南极发生日蚀，至於有什麽东西醒来？ 还需要等待南极科考团的进一步回报。 https://youtu.be/xvpBDopIMxw -- https://www.youtube.com/watch?v=m-QXmqX7k8Q 刘德华 悟 电影【新少林寺】主题曲 https://youtu.be/dLRLWy7bKS4 作曲：赵钦 作词：刘德华 《金刚总持祈请文》 编曲：Adam Lee．饰坠．陈德建 蒋巴桑波 (第七世噶玛巴确扎嘉措之根本上师) 着 监制：陈德建．李安修 不要把金王冠织入鸟巢中 招惹微风与猎枪是不明智的 依常断见所立宗 能坏慧命因缘法 精勤十善一夜尽 纵生天人多阐提 --

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