Geothermics and climate change: 1. Analysis of borehole temperatures with emphasis on resolving power

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Publication Type Journal Article
School or College College of Mines & Earth Sciences
Department Geology & Geophysics
Creator Chapman, David S.
Other Author Harris, Robert N.
Title Geothermics and climate change: 1. Analysis of borehole temperatures with emphasis on resolving power
Date 1998
Description Temperature-depth data from six boreholes in western Utah and nine boreholes in southeastern Utah are reanalyzed for evidence of ground surface temperature (GST) histories. We invert the temperature-depth data using the functional space inverse algorithm of Shen and Beck [1991, 1992] which we prefer over previous inversions of these data because of its greater sophistication and flexibility in suppressing noise. GST histories for western and southeastern Utah are generally consistent and suggest that temperatures in the mid-1800s are, on average, cooler than previous centuries, followed by about 0.6°C of warming in this century. Attention is given to the temporal resolution of our GST solutions showing the time-smearing effects of heat conduction on the solutions. GST solutions represent an average ground temperature over a time window that expands as we look farther into the past. The size of the time window is a function of measurement and geologic noise and limits the ultimate resolution of GST reconstructions.
Type Text
Publisher American Geophysical Union (AGU)
Volume 103
Issue B4
First Page 7360
Last Page 7370
Subject Surface air temperature; Ground surface temperature; Borehole temperatures; Geothermal observations; Geothermics
Subject LCSH Climatic changes; Global warming; Earth temperature
Language eng
Bibliographic Citation Harris, R. N., & Chapman, D. S. (1998). Geothermics and climate change: 1. Analysis of borehole tempratures with emphais on resolving power. Journal of Geophysical Research, 103(B4), 7360-70.
Rights Management Harris, R. N., & Chapman, D. S., Geothermics and climate change: 1. Analysis of borehole tempratures with emphais on resolving power, Journal of Geophysical Research, 103, B4, 7360-70, 1998. Copyright 1998 American Geophysical Union. Reproduced/modified by permission of American Geophysical Union.
Format Medium application/pdf
Format Extent 725,940 bytes
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Reference URL https://collections.lib.utah.edu/ark:/87278/s6931bnc