为什么我们要从地心测量海平面?-地江南体育网页版球科学堆栈交换江南电子竞技平台 最近30个来自www.hoelymoley.com 2023 - 03 - 30 - t08:15:07z //www.hoelymoley.com/feeds/question/6694 https://creativecommons.org/licenses/by-sa/4.0/rdf //www.hoelymoley.com/q/6694 6 为什么我们要从地心测量海平面? Tayyaba //www.hoelymoley.com/users/4613 2015 - 10 - 11 - t07:47:00z 2019 - 03 - 17 - t19:42:07z 地球是旋转的,所以它有一个椭球形。因此,测量方法将不同于赤道和极点。那么,为什么我们要从地心测量海平面呢?< / p > //www.hoelymoley.com/questions/6694/-/6701#6701 6 为什么我们要从地球中心测量海平面? 弗雷德 //www.hoelymoley.com/users/2470 2015 - 10 - 12 - t01:19:09z 2015 - 10 - 12 - t01:19:09z 地球的中心是唯一真正不变的基准。< / p >

Land masses rise and fall due to geological actions such as melting of land based ice sheets, volcanism, plate tectonics, erosion, sedimentation and ground stresses causing land masses to move relative to one another at faults.

As stated here, sea level changes resulting from,

Eustatic change (as opposed to local change) results in an alteration to the global sea levels due to changes in either the volume of water in the world oceans or net changes in the volume of the ocean basins.

With the elevation of land altering over time (rising or falling depending on location), the true change in sea levels cannot be determined from using points on the Earth's surface as a datum; particularly when the volume of the ocean basins changes due to land mass movements.

True changes in sea levels can only be ascertained from an unchanging datum, which on Earth is the centre of the Earth.

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