Počet záznamů: 1

Recurrence quantification analysis of borehole temperatures: evidence of fluid convection

  1. 1.
    0330791 - GFU-E 2010 RIV SG eng J - Článek v odborném periodiku
    Čermák, Vladimír
    Recurrence quantification analysis of borehole temperatures: evidence of fluid convection.
    International Journal of Bifurcation and Chaos. Roč. 19, č. 3 (2009), s. 889-902 ISSN 0218-1274
    Výzkumný záměr: CEZ:AV0Z30120515
    Klíčová slova: borehole temperatures * recurrence quantification analysis * fluid intermittency * periodic-chaotic transition
    Kód oboru RIV: DC - Seismologie, vulkanologie a struktura Země
    Impakt faktor: 0.918, rok: 2009

    To describe intra-hole fluid convection, fine-scale temperature-time variations were monitored at 25 depth levels within a 50 m long interval (80–130 m depth) in a slim experimental borehole in Sporilov (the Czech Republic). High-resolution temperature data were sampled with a 15 sec time interval for 1.6 up to 2.7 days. The time series obtained were from 10 000 to 16 000 data points. In the upper part of the investigated depth interval, the temperature time series showed a complex oscillation pattern with amplitudes of up to 45 mK (milliKelvin). This variation pattern is alternated with a "quiet" regime below 110 m depth, where temperature oscillations fall within 4–10 mK range.
    Trvalý link: http://hdl.handle.net/11104/0176494