Sentences with phrase «geothermal temperature gradient»
In equilibrium there should be no permafrost underneath the ocean, because the ocean is unfrozen, and the sediment gets warmer with depth below that (the geothermal temperature gradient).
http://www.realclimate.org/ Not exact matches
Those temperature gradients are the only way the geothermal heat is transported to the surface.
Generally, water infiltration notwithstanding, annual temperature variation ceases at about 1 meter in depth and the geothermal gradient of 22C / km begins.
«Temperature Tools The temperature log can be used to give a useful profile of the thermal conductivity of rocks adjacent to the borehole and a measurement of the local geothermal gradient when the borehole is allowed to stabilize for a period of time (at least several days) after drilling ceases, assuming there is no convection in thTemperature Tools The temperature log can be used to give a useful profile of the thermal conductivity of rocks adjacent to the borehole and a measurement of the local geothermal gradient when the borehole is allowed to stabilize for a period of time (at least several days) after drilling ceases, assuming there is no convection in thtemperature log can be used to give a useful profile of the thermal conductivity of rocks adjacent to the borehole and a measurement of the local geothermal gradient when the borehole is allowed to stabilize for a period of time (at least several days) after drilling ceases, assuming there is no convection in the borehole.
«Departures from the expected increase in temperature with depth (the geothermal gradient) can be interpreted in terms of changes in temperature at the surface in the past, which have slowly diffused downward, warming or cooling layers meters below the surface.»
In any case, unless the boreholes were made with a magic drilling rig, where the drilling head generated no heat, and no fluid or drilling mud was used to flush the drill waste from the hole, the temperatures of the exposed bore walls are useless for anything except rough indications of the local geothermal gradient.