Repeat temperature measurements in boreholes from northwestern Utah link ground and air temperature changes at the decadal time scale Public Deposited

http://ir.library.oregonstate.edu/concern/defaults/6108vc858

Descriptions

Attribute NameValues
Creator
Abstract or Summary
  • Borehole temperature profiles provide a record of ground surface temperature (GST) change at the decadal to centennial time scale. GST histories reconstructed from boreholes are particularly useful in climate reconstruction if changes in GST and surface air temperature (SAT) are effectively coupled at decadal and longer time periods and it can be shown that borehole temperatures respond faithfully to surface temperature changes. We test these assumptions using three boreholes in northwestern Utah that have been repeatedly logged for temperature over a time span of 29 years. We report 13 temperaturedepth logs at the Emigrant Pass Observatory borehole GC‐1, eight at borehole SI‐1 and five at borehole DM‐1, acquired between 1978 and 2007. Systematic subsurface temperature changes of up to 0.6°C are observed over this time span in the upper sections of the boreholes; below approximately 100 m any temperature transients are within observational noise. We difference the temperature logs to highlight subsurface transients and to remove any ambiguity resulting from steady state source of curvature. Synthetic temperature profiles computed from SAT data at nearby meteorological stations reproduce both the amplitude and pattern of the transient temperature observations, fitting the observations to within 0.03°C or better. This observational confirmation of the strong coupling between surface temperature change and borehole temperature transients lends further support to the use of borehole temperatures to complement SAT and multiproxy reconstructions of climate change.
Resource Type
DOI
Date Available
Date Issued
Citation
  • Davis, M. G., R. N. Harris, and D. S. Chapman (2010), Repeat temperature measurements in boreholes from northwestern Utah link ground and air temperature changes at the decadal time scale, J. Geophys. Res., 115, B05203, doi:10.1029/2009JB006875.
Series
Keyword
Rights Statement
Funding Statement (additional comments about funding)
Publisher
Peer Reviewed
Language
Replaces
Additional Information
  • description.provenance : Made available in DSpace on 2011-10-13T22:19:27Z (GMT). No. of bitstreams: 1 HarrisRobert.COAS.RepeatTemperatureMeasurements.pdf: 1223390 bytes, checksum: 77da5cea434ea622d3af0738c275ea45 (MD5) Previous issue date: 2010-05-11
  • description.provenance : Approved for entry into archive by Laura Wilson(laura.wilson@oregonstate.edu) on 2011-10-13T22:19:27Z (GMT) No. of bitstreams: 1 HarrisRobert.COAS.RepeatTemperatureMeasurements.pdf: 1223390 bytes, checksum: 77da5cea434ea622d3af0738c275ea45 (MD5)
  • description.provenance : Submitted by Deborah Campbell (deborah.campbell@oregonstate.edu) on 2011-09-21T18:24:09Z No. of bitstreams: 1 HarrisRobert.COAS.RepeatTemperatureMeasurements.pdf: 1223390 bytes, checksum: 77da5cea434ea622d3af0738c275ea45 (MD5)

Relationships

Parents:

This work has no parents.

Last modified

Downloadable Content

Download PDF

Items