RT Journal Article
T1 Impact of postglacial warming on borehole reconstructions of last millennium temperatures
A1 Rath, V.
A1 González Rouco, Jesús Fidel
A1 Goosse, H.
AB 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.
PB Copernicus Gesellschaft MBH
SN 1814-9324
YR 2012
FD 2012
LK https://hdl.handle.net/20.500.14352/44930
UL https://hdl.handle.net/20.500.14352/44930
LA eng
NO © Author(s) 2012. This work is distributedunder the Creative Commons Attribution 3.0 License. We thank J.-C. Mareschal and the anonymous reviewer for their efforts, which improved this article considerably. VR was funded by the Ramón y Cajal Program (Gobierno de España, Ministerio de Educación, Cultura y Deporte), project CCG10-UCM/ESP-5070 (Comunidad de Madrid/UCM), and project CGL2011-29672-C02-01 (Gobierno de España, Ministerio de Economía y Competitividad).
NO Programa Ramón y Cajal (MECD)
NO Comunidad de Madrid
NO Ministerio de Economía y Competitividad (MINECO), España
NO Ministerio de Educación, Cultura y Deporte (MECD), España
NO Universidad Complutense de Madrid (UCM)
DS Docta Complutense
RD 11 abr 2025