JE PROUDĚNÍ VZDUCHU V JESKYNI OVLIVNĚNO VENKOVNÍM VĚTREM?
Based on the case study in Císařská Cave (Moravian Karst), it was tested the impact of external wind on airflow dynamic. Time series of the cave airflow, external wind, and cave/external temperature (signals) were monitored at the lower entrance of the cave during an upward airflow ventilation mode. The periods of the oscillations in both signals (3.8 to 13.3 minutes in the cave airflow and 5.5 to 9.2 minutes in the external wind) were inconsistent. The correlation between both signals was statistically insignificant. The cross correlation did not show any time shift between both signals. These results rather question the generally presumed impact of external wind on cave airflow.
Badino, G. (2010): Underground meteorology – „What´s the weather underground?“ – Acta Carsologica, 39 (3), 427–448.
Bourges, F. – Mangin, A. – d´Hulst, D. (2001): Le gaz carbonique dans la dynamique de l´atmosphére des cavités karstiques: l´exemple de l´Aven d´Orgnac (Ardéche). – Earth and Planetary Science, 333, 685–692. (in French)
De Freitas, C. R. – Littlejohn, R. N. – Clarkson, T. S. – Kristament, L. S. (1982): Cave climate: assessment of airflow and ventilation. – Journal of Climatology, 2, 383–397. DOI: 10.1002/joc.3370020408
Faimon, J. – Lang, M. (2013): Variances in airflows during different ventilation modes in a dynamic U-shaped cave. – International Journal of Speleology, In press.
Faimon, J. – Ličbinská, M. (2010): Carbon dioxide in the soils and adjacent caves of the Moravian Karst. – Acta Carsologica, 39 (3), 463–475.
Faimon, J. – Štelcl, J. – Sas, D. (2006): Anthropogenic CO2-flux into cave atmosphere and its environmental impact: A case study in the Císařská Cave (Moravian Karst, Czech Republic). – Science of the Total Environment, 369, 231–245. DOI: 10.1016/j.scitotenv.2006.04.006
Faimon, J. – Troppová, D. – Baldík, V. – Novotný, R. (2012): Air circulation and its impact on microclimatic variables in the Císařská Cave (Moravian Karst, Czech Republic). – International Journal of Climatology, 32, 599–623. DOI: 10.1002/joc.2298
Ford, T. D. – Williams, P. W. (2007): Karst Hydrogeology and Geomorphology. – Wiley & Sons, Chicester. 562 pp.
Kowalczk, A. J. – Froelich, P. N. (2010): Cave air ventilation and CO2 outgassing by radon-222 modeling: How fast do cave breath? – Earth and Planetary Science Letters, 289, 209–219. DOI: 10.1016/j.epsl.2009.11.010
Pfl itsch, A. – Piasecki, J. (2003): Detection of an airflow system in Niedzwiedzia (Bear) Cave, Kletno, Poland. – Journal of Cave and Karst Studies, 65 (3), 160–173.
Plummer, W. T. (1969): Infrasonic resonance in natural underground cavities. – The Journal of the Acoustical Society of America, 46, 1074–1080. DOI: 10.1121/1.1911823
Spötl, C. – Fairchild, U. – Tooth, A. F. (2005): Cave air control on dripwater geochemistry, Obir Caves (Austria): Implications for speleothem deposition in dynamically ventilated caves. – Geochimica et Cosmochimica Acta, 69, 2451–2468. DOI: 10.1016/j.gca.2004.12.009
Statistica (2013): StatSoft . Dostupné na http://www.statsoft .com/ [30. 1. 2013].
White, W. B. (1988): Geomorphology and Hydrology of Karst Terrains. – Oxford University Press, New York, 464 pp.