Record details

Title
    The Last Glacial-Interglacial Temperature C ontrast Directly From the Present Subsurface Temperatures
Statement of responsibility
    Jan Šafanda, Vladimír Čermák, Dušan Rajver
Other titles
    Upper Pleistocene and Holocene Climatic Variations (Variant.)
Author
    Čermák, Vladimír
    Rajver, Dušan
    Šafanda, Jan
Language
    anglicky
Source title - serial
    Geolines
Vol./nr.
    Vol. 11
Pages
    p. 28-30
Year
    2000
Notes
    2 diagr., 1 tab., 7 bibl.
    il.
    Zkr. název ser.: Geolines (Praha)
Subject group
    globální oteplování
    holocén
    pleistocén-svrchní
    teplota
    vrt hluboký
    změna klimatu
Geographical name
    Čeladná (Frýdek-Místek)
    ČR-Morava
    Dětřichov nad Bystřicí (Bruntál)
    Slovinsko
    SRN-Bayern
    Tichá (Nový Jičín)
Keyword
    Directly
    Glacial-Interglacial
    Last
    Ontrast
    Present
    Subsurface
    Temperature
    Temperatures
Abstract (in english)
   Ground surface temperature (GST) history can be evaluated by analysing the present-day temperature-depth profiles measured in boreholes. Due to the diffusive character of the process, however, the resolution of the method decrease quickly for the more remote events. The reconstructed GST at a given moment in the past is a weighted average of temperature over a certain period of time. The present study shows that because the cold climate of the last (Weichselian) glacial prevailed in the period of 75-10 ka, there is a change to obtain its mean GST, despite the large averaging intervals, from temperature profiles measured in deep boreholes. These fact is on the GST inversions of carefully selected profiles, 3 from the Czech Republic and 2 from Slovenia, the depth of which ranges between 1.5 and 2.4 km. In order to suppress the non-climatic noise and to extract the common signal, were carried out for the Czech and the Slovenian boreholes, respectively.
   The Czech data show the minimum at 17 ka and the warming of 58 K. The Slovenian data have the minimum at 16 ka and the warming amounts to 7 K. These results agree well with information extracted earlier from the German KTB superdeep borehole, where the inversion of the temperature log indicated 10 K warming since the glacial minimum, and represent a direct and independent estimate of the difference between glacial and interglacial conditions typical for the region of Central Europe
Contributor
    Česká geologická služba
Contributor code
    ČGS (UNM)
Source format
    U
Entered date
    3. 7. 2007
Import date
    8. 8. 2012