地殻変動における表面温度の影響について

Abstract

The thermoelastic strains are discussed theoretically when a sinusoidal variation of tem-perature exists on the Earth's surface. The exact solutions are obtained according to M.A.Biot's theory of irreversible thermodynamics and transformed into approximative expressionsmore suitable and applicable to the present case.Each term in the solutions has its own physical meaning, separating the strains causedby thermal energy itself, from those propagated elastically through the whole medium.The solutions are estimated numerically from the observational results obtained by I.Ozawa at Osakayama Observatory. It is confirmed that the surface temperature affects thecrustal deformations to a considerable extent.