Temperature between Earth's core and surface is distributed non-linearly
Geophysical evidence demonstrates that the temperature profile between Earth's core and its surface varies across different layers and boundaries, resulting in a non-linear thermal distribution.
The claim that the temperature between Earth's core and surface is distributed non-linearly is well-established geophysics and supported by multiple papers discussing mantle thermal gradients, core-mantle boundary heat flow, and varying geothermal gradients across crustal layers.
M. Murakami, A. F. Goncharov, N. Miyajima, Daisuke Yamazaki, N. Holtgrewe. Radiative thermal conductivity of single-crystal bridgmanite at the core-mantle boundary with implications for thermal evolution of the Earth. 2022. https://doi.org/10.1016/j.epsl.2021.117329
Paper 0 discusses how heat is transferred from the hot molten core through the core-mantle boundary and into the mantle, implying distinct thermal gradients and layers between the core and surface.
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Feiyang Xu, Dong Wang, Zhiguo Li, Hongxing Song, Lei Liu, Huayun Geng, Jianbo Hu, Xiangrong Chen. Large-scale simulation of thermal conductivity in CaSiO3 perovskite with neuroevolution potential. 2024. https://doi.org/10.1063/5.0217468
Paper 1 investigates mineral thermal conductivities and the global distribution of temperature across Earth's interior, supporting non-uniform thermal structures.
M. Tirone. On the thermal gradient in the Earth's deep interior. 2016. https://doi.org/10.5194/se-7-229-2016
Paper 3 examines the thermal gradient and variations in temperature across large portions of the Earth's deep interior, which deviate from simple linear profiles.
Vlaha DR, Zuza AV, Chen L, Harlaux M. Hot Cordilleran hinterland promoted lower crust mobility and decoupling of Laramide deformation.. 2024. https://doi.org/10.1038/s41467-024-48182-8
Paper 7 reconstructs the upper-crustal geothermal gradient and thermal architecture of the crust, illustrating non-linear and variable temperature changes with depth.
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