CLIMATE CHANGES OF THE LAST MILLENNIUM INFERRED FROM BOREHOLE TEMPERATURES - RESULTS FROM THE CZECH-REPUBLIC .1.

Ground surface temperature histories were reconstructed from the tempe rature logs of eleven boreholes drilled in the Czech Republic. The stu dy has identified several climate episodes during the past millennium, when the ground surface temperature oscillated with an amplitude of a t least 2-3 K. Pronounced warming by up to 2 K characterized the begin ning of the 20th century. The results seem to correlate well with clim ate reconstructions based on proxy data, and also with the long-term m eteorological records. The paper represents the first part of a more e xtensive study aimed to propose a regional pattern of the past climate change derived from geothermal data in Central Europe.