Inference of ground surface temperature history from subsurface temperature data: Interpreting ensembles of borehole logs
dc.contributor.author | Pollack, Henry N. | en_US |
dc.contributor.author | Shen, Po Yu | en_US |
dc.contributor.author | Huang, Shaopeng | en_US |
dc.date.accessioned | 2006-09-08T21:12:42Z | |
dc.date.available | 2006-09-08T21:12:42Z | |
dc.date.issued | 1996-08 | en_US |
dc.identifier.citation | Pollack, Henry N.; Shen, Po Yu; Huang, Shaopeng; (1996). "Inference of ground surface temperature history from subsurface temperature data: Interpreting ensembles of borehole logs." Pure and Applied Geophysics PAGEOPH 147(3): 537-550. <http://hdl.handle.net/2027.42/43230> | en_US |
dc.identifier.issn | 0033-4553 | en_US |
dc.identifier.issn | 1420-9136 | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/43230 | |
dc.description.abstract | Ground surface temperature histories (GSTHs) inferred from borehole temperaturedepth ( T-z ) data are often degraded, to a various extent, by random or systematic noise in the T-z data and in the measurements of thermophysical properties of the earth. To minimize the effects of noise, and hence improve the fidelity of the inferred GSTH, a plausible approach is to perform a simultaneous inversion, of the T-z logs in a region, or alternatively, to invert the individual T-z logs and then average the resulting GSTHs. Averaging and simultaneous inversion are conceptually different: whereas an averaging can always be peformed, a simultaneous inversion is predicated on the assumption of a common transient component of the GSTH in all the T-z logs. In this work we examine and compare the two approaches, using a time domain inverse formulation based on the method of least squares. We consider a set of scenarios: (a) multiple T-z logs from a single borehole, (b) multiple boreholes from a single site, (c) multiple boreholes in similar climatological settings, and (d) multiple boreholes in different climatological settings. We show that for (a), (b) and (c), averaging and simultaneous inversion yield nearly identical results. For boreholes in different settings, the assumption of a common transient GSTH may be invalid and averaging and simultaneous inversion give divergent results. | en_US |
dc.format.extent | 962149 bytes | |
dc.format.extent | 3115 bytes | |
dc.format.mimetype | application/pdf | |
dc.format.mimetype | text/plain | |
dc.language.iso | en_US | |
dc.publisher | Birkhäuser-Verlag; Birkhäuser Verlag ; Springer Science+Business Media | en_US |
dc.subject.other | Geosciences | en_US |
dc.subject.other | Geophysics/Geodesy | en_US |
dc.subject.other | Borehole Temperature | en_US |
dc.subject.other | Climate Change | en_US |
dc.subject.other | Inversion | en_US |
dc.title | Inference of ground surface temperature history from subsurface temperature data: Interpreting ensembles of borehole logs | en_US |
dc.type | Article | en_US |
dc.subject.hlbsecondlevel | Atmospheric, Oceanic and Space Sciences | en_US |
dc.subject.hlbsecondlevel | Physics | en_US |
dc.subject.hlbtoplevel | Science | en_US |
dc.description.peerreviewed | Peer Reviewed | en_US |
dc.contributor.affiliationum | Department of Geological Sciences, University of Michigan, 48109-1063, Ann Arbor, Michigan, USA | en_US |
dc.contributor.affiliationum | Department of Geological Sciences, University of Michigan, 48109-1063, Ann Arbor, Michigan, USA | en_US |
dc.contributor.affiliationother | Department of Earth Sciences, University of Western Ontario, N6A 5B7, London, Canada | en_US |
dc.contributor.affiliationumcampus | Ann Arbor | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/43230/1/24_2004_Article_BF00878843.pdf | en_US |
dc.identifier.doi | http://dx.doi.org/10.1007/BF00878843 | en_US |
dc.identifier.source | Pure and Applied Geophysics PAGEOPH | en_US |
dc.owningcollname | Interdisciplinary and Peer-Reviewed |
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