Rate of Geothermal Temperature T_G({\bf r}) change along True Vertical Direction with no account of effects of the seasonal/daily temperature variations ( which are only noticeable above Neutral Temperature Layer ):
| (1) | G_T({\bf r}) = \frac{j_z({\bf r})}{\lambda_e({\bf r})} |
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| Fig. 1. Schematic view of the Earth's Geothermal Temperature Gradient. |
The most common value of Geothermal Temperature Gradient away from tectonic plate boundaries : GT = 0.025 ÷ 0.030 °C/m.
See Also
Geology / Geothermal Temperature Field
[ Geothermal Temperature Gradient (GradT) ]