The potential corrosion of speleothems by condensation water
Song Linhua, Yang Jingrong , Wang Laihong - (27/1,1998)
Because of the development of tourist activities and facilities in show caves, the closed system of the caves has been changed into complicated open system. The visitor flow and the high energy of landscape lights give a great deal of thermoenergy to the show cave system, which makes the temperature rise and reduces the humidity very fast. After the visitors leave and the lights are switched off, the temperature goes down and humidity increases even up to saturation, condensation takes place. The humidity of Yaolin cave reaches 97%-100% throughout the year. The visitors give average CO2 content of 13000-15000 ppm by breathing and one visitor breathes 40 litre of CO2 per hour. The visitors strongly influence the CO2 content of the cave atmosphere.