Earth's density flattening and hypothesis of latitudinal normal density

摘要

In this paper, the definition of latitudinal density and de4nsity flattening of the level ellip- soid is given, and integral formulas of latitudinal density for pole gravity and equator gravity are derived. According tot he pole gravity condition and equator gravity condition for the level ellipsoid, latitudinal density distribution function of the level ellipsoid is obtained. It is proved mathematically that latitudinal density of the earth's equator is larger than that of the pole, the earth's density flat- tening calculated preliminarily is 1/322, and hypothesis of the earth's latitudinal normal density is further proposed, so that theoretical preparation for studying the forming cause of the earth gravity in problems such as continent drift, mantle convection, and submarine extension is made well.