Record details

Title
    Cave Microclimate Impact on Karst Processes: Role of Cave Ventilation
Author
    Faimon, Jiří
    Troppová, Dana
Language
    anglicky
Publication type
    článek v periodiku
Source title - serial
    Slovenský kras (Acta Carsologica Slovaca)
Vol./nr.
    Roč. 46, č. 2
Pages
    3
Year
    2008
Thesaurus term
    atmosphere
    cave
    condensation
    flow direction
    flux
    oscillation
    ventilation
Keyword
    Cave
    Impact
    Karst
    Microclimate
    Processes
    Role
    Ventilation
Abstract (in english)
   Cave ventilation and its impact on microclimatic parameters were studied in the Císařská Cave (the northern part of the Moravian Karst, Czech Republic) during 2006-2007 period. Air fluxes through cave oscillated with a period of few seconds and amplitude about 0.1 m3 s-1. Mean volume fluxes through the lower and higher entrances, respectively, varied from +0.10 to -0.05 m3 s-1 and from -0.19 to +0.07 m3 s-1 as outdoor temperature varied between -3.2 and 31.9 deg C. The unbalanced fluxes indicate minor additional fluxes in/out of cave. A nonlinear dependence of air flux on outdoor temperature was found. The fluxes were lowest at 13 deg C. They oscillated with 0.03 m3 s-1 amplitude and changed their directions. The cave ventilation, v = 0.059 hour-1, and residence time, tau = 17 hours, were calculated from the maximum flux of 0.188 m3 s-1. The residence time value indicates that cave atmosphere should be completely exchanged during 17 hours under these conditions and at an ideally piston
    flux.
Contributor
    MU Brno, Přírodovědecká fakulta
Contributor code
    MU, PřF
Source format
    R
Import date
    8. 8. 2012