Ground surface temperature reconstructions: Using in situ estimates for thermal conductivity acquired with a fiber-optic distributed thermal perturbation sensor

• Published in: Geophysical Research Letters
• Main Authors: Freifeld, B.M., Finsterle, S., Onstott, T.C., Toole, P., Pratt, L.M.
• Language: unknown
• Published: 2009
• Subjects: 54; 58; BOREHOLES; HEATERS; PERMAFROST; SPATIAL RESOLUTION; THERMAL CONDUCTIVITY; TRANSIENTS; Nunavut; Canada; High Lake; permafrost
• Online Access: http://www.osti.gov/servlets/purl/951790; https://www.osti.gov/biblio/951790; https://doi.org/10.1029/2008GL034762

We have developed a borehole methodology to estimate formation thermal conductivity in situ with a spatial resolution of one meter. In parallel with a fiber-optic distributed temperature sensor (DTS), a resistance heater is deployed to create a controlled thermal perturbation. The transient thermal...