Impact of postglacial warming on borehole reconstructions of last millennium temperatures

The investigation of observed borehole temperatures has proved to be a valuable tool for the reconstruction of ground surface temperature histories. However, there are still many open questions concerning the significance and accuracy of the reconstructions from these data. In particular, the temper...

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Detalhes bibliográficos
Autores: Rath, V., González-Rouco, J. F., Goosse, H.
Formato: artículo
Estado:Versión publicada
Fecha de publicación:2012
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/76015
Acesso em linha:http://hdl.handle.net/10261/76015
Access Level:acceso abierto
Palavra-chave:Paleoclimatología
Paleoclimatology
Postglacial warming
Glacial maximum
Heat transport
Climate
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spelling Impact of postglacial warming on borehole reconstructions of last millennium temperaturesRath, V.González-Rouco, J. F.Goosse, H.PaleoclimatologíaPaleoclimatologyPostglacial warmingGlacial maximumHeat transportClimateThe investigation of observed borehole temperatures has proved to be a valuable tool for the reconstruction of ground surface temperature histories. However, there are still many open questions concerning the significance and accuracy of the reconstructions from these data. In particular, the temperature signal of the warming after the Last Glacial Maximum is still present in borehole temperature profiles. It is shown here that this signal also influences the relatively shallow boreholes used in current paleoclimate inversions to estimate temperature changes in the last centuries by producing errors in the determination of the steady state geothermal gradient. However, the impact on estimates of past temperature changes is weaker. For deeper boreholes, the curvature of the long-term signal is significant. A correction based on simple assumptions about glacial–interglacial temperature changes shows promising results, improving the extraction of millennial scale signals. The same procedure may help when comparing observed borehole temperature profiles with the results from numerical climate models.Peer reviewedCopernicus Publications201320132012info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/76015reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.5194/cp-8-1059-2012info:eu-repo/semantics/openAccessoai:digital.csic.es:10261/760152026-05-22T06:33:51Z
dc.title.none.fl_str_mv Impact of postglacial warming on borehole reconstructions of last millennium temperatures
title Impact of postglacial warming on borehole reconstructions of last millennium temperatures
spellingShingle Impact of postglacial warming on borehole reconstructions of last millennium temperatures
Rath, V.
Paleoclimatología
Paleoclimatology
Postglacial warming
Glacial maximum
Heat transport
Climate
title_short Impact of postglacial warming on borehole reconstructions of last millennium temperatures
title_full Impact of postglacial warming on borehole reconstructions of last millennium temperatures
title_fullStr Impact of postglacial warming on borehole reconstructions of last millennium temperatures
title_full_unstemmed Impact of postglacial warming on borehole reconstructions of last millennium temperatures
title_sort Impact of postglacial warming on borehole reconstructions of last millennium temperatures
dc.creator.none.fl_str_mv Rath, V.
González-Rouco, J. F.
Goosse, H.
author Rath, V.
author_facet Rath, V.
González-Rouco, J. F.
Goosse, H.
author_role author
author2 González-Rouco, J. F.
Goosse, H.
author2_role author
author
dc.subject.none.fl_str_mv Paleoclimatología
Paleoclimatology
Postglacial warming
Glacial maximum
Heat transport
Climate
topic Paleoclimatología
Paleoclimatology
Postglacial warming
Glacial maximum
Heat transport
Climate
description The investigation of observed borehole temperatures has proved to be a valuable tool for the reconstruction of ground surface temperature histories. However, there are still many open questions concerning the significance and accuracy of the reconstructions from these data. In particular, the temperature signal of the warming after the Last Glacial Maximum is still present in borehole temperature profiles. It is shown here that this signal also influences the relatively shallow boreholes used in current paleoclimate inversions to estimate temperature changes in the last centuries by producing errors in the determination of the steady state geothermal gradient. However, the impact on estimates of past temperature changes is weaker. For deeper boreholes, the curvature of the long-term signal is significant. A correction based on simple assumptions about glacial–interglacial temperature changes shows promising results, improving the extraction of millennial scale signals. The same procedure may help when comparing observed borehole temperature profiles with the results from numerical climate models.
publishDate 2012
dc.date.none.fl_str_mv 2012
2013
2013
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/76015
url http://hdl.handle.net/10261/76015
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.5194/cp-8-1059-2012
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Copernicus Publications
publisher.none.fl_str_mv Copernicus Publications
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.812455

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