RECONSTRUCTION OF REMOTE CLIMATE CHANGES FROM BOREHOLE TEMPERATURES

Data from temperature measurements in drillholes are indicators of the temperature variations associated with past climate change, The aim o f this paper is to investigate the maximum extent of ground temperatur e history which can be extracted from geothermal data. We discuss grou nd surface temperature histories reconstructed from borehole temperatu re measurements in twelve deep holes (similar to 700 to 6000 m) in the Czech Republic. The study has identified climatic episodes back to th e last glaciation period The reconstructed climatic histories exhibit features similar to those extracted from borehole temperature logs by other inversion techniques and also found by independent climate recon struction methods. Results confirm the possibility to identify long-te rm climatic trends from the borehole temperature-depth profiles and to integrate it into the assemblage of traditional paleoclimatological r ecords.