@gerrit评论,精确计算需要把一个litospheric占均衡模型(幅度反弹)[1]。但“模糊近似”你想要的,可以只基于地形数据。这个近似合理准确,如果冰的融化速度也很快。为此,我们需要当前表面的地形数据,基岩地形。这是光秃秃的地面冰。这些数据在全球范围内的唯一来源(至少我所知道的)[ETOPO1][2],在分辨率为1 arc-minute(约1.8公里)。ETOPO1当前表面数据的可视化,使用等积海平面(埃克特四世)和设置在0 m是这样的:[![在这里输入图像描述][3]][3]如果我们测量海洋和陆地区域,它说* *目前,70.97%的全球海洋表面对应于* *,很符合你的图。请注意,这个简单的方法并不考虑湖泊或河流,海洋。它也会误解低于海平面陆地海洋。 However, all those factors are arguably minor contributions at a global scale. Now, if we use the bedrock version of ETOPO1, and set the sea level at [66.5 m, consistent with the best estimates of water stored in land ice][4]. The globe would look like this [![enter image description here][5]][5] In this case, **if all the ice melts, the fraction of the Earth's surface covered by water would be 75.18%**. Equivalent to an increase of 4.21% relative to the current value. [1]: https://en.wikipedia.org/wiki/Post-glacial_rebound [2]: https://www.ngdc.noaa.gov/mgg/global/global.html [3]: https://i.stack.imgur.com/nPFXt.png [4]: https://www.sciencedirect.com/science/article/pii/B9780444635242000051 [5]: https://i.stack.imgur.com/MSFPJ.png