The progressive increase of temperature with depth into the Earth.
The rate at which temperature increases with increasing depth below the Earth's surface; a general average is around 30ºC increase per additional km of depth.
The rate of increase of temperature in the Earth with depth. The gradient near the surface of the Earth varies from place to place, depending on the heat flow in the region and on the thermal conductivity of the rock. Approximate average geothermal gradient in the Earth's crust is about 25ºC/km.
The rate of temperature increase with depth below the ground surface.
The change in the earth's temperature with depth. As one goes deeper, the earth becomes hotter.
The rate of increase of temperature in the earth with depth. The gradient near the surface of the earth varies from place to place depending on the heat flow in the region and on the thermal conductivity of the rock. Caused by the continuous flow of heat outward through the crust of the earth.
Same as thermal gradient.
the increase in the temperature of the earth from its surface downward to the core, estimated to be 1 degree F per 60 feet. [AHDOS
the rate of temperature increase with depth in the subsurface.
The rate of temperature increase in the earth as a function of depth. Temperature increases an average of 1° Fahrenheit for every 75 feet in descent.
The geothermal gradient is a ratio describing the rate of heating or cooling of the Earth's top soil and rock layers the deeper you go down, for instance by descending into a cave or drilling a well. The geothermal gradient is measured by taking a series of bottom open-hole temperature measurements during the drilling of a borehole. To achieve accuracy the drilling fluid needs time to reach the ambient temperature.
