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Borehole Data


Drilling rig at night, San Andreas Fault Observatory at Depth (SAFOD). USGS photo. Land drilling rig.  ORNL Photo. Truck mounted drilling rig.  USGS photo.

Borehole data are direct measurements of temperature from boreholes drilled into the Earth crust. 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.Most borehole data at the WDC are from the University of Michigan's Global Database of Borehole Temperatures and Climate Reconstructions. more...

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arrow.gif (938 bytes)Contributing data to the UM Global Borehole Database

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http://www.ncdc.noaa.gov/paleo/borehole/index.html
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Last Updated Thursday, 08-Mar-2012 13:21:10 EST by paleo@noaa.gov
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