R3: High-pressure science and deep Earth's material

[R3-01] Effect of the pressure scale problem on the core density deficit

*Takeshi Sakai¹ (1. GRC, Ehime Univ.)

Keywords:Core density deficit, pressure scale, equation of state, light elements in the core

Here we examined the effect of the pressure scale problem on the density deficit (cdd) of Earth’s core. The density deficit value differs from 3.4% to 4.7% depending on the choice of pressure scale. I also estimate the possible amount of silicon in the inner core and its several errors come from each of the uncertainty of the ICB temperature, core density, average thermal expansivity, and nickel content. The silicon content variation due to the choice of pressure scale is comparable or larger than the errors come from other uncertainties.