Temperature changes in and outside the old shelter throughout the year described an S curve. The outside temperature changed from -4 °C to 25 °C, and the temperature on the rock surface with the inscribed characters in the old shelter changed from -2 °C to 23 °C. This showed that the surface had long been affected by repeated freezing and thawing.
Soon after construction began on the new shelter, and particularly after the outer wall and the roof were completed, the inside temperature
Figure 6
Displacement meters (transducers) installed inside the cave.
Figure 7
Displacement meter (transducer) installed across an open crack.
Figure 8
Displacement monitor shown inside the cave.
Did not fall to the same extent as before, and the inscribed rock surface has not frozen since.
In the old shelter (before the new shelter was constructed over the old one), the average relative humidity at the inscribed rock surface was about 80%. Now it is over 90%, as the area is more completely enclosed. The temperature and relative humidity are expected to be properly stabilized with air conditioners after the inscribed rock is covered by a capsule and the interior construction is completed (the new shelter was completed in March 1995).
It is not possible to determine at this time whether the respiration of visitors affects the microclimate on an annual basis, as these measurements have not been made over a long enough period. But such a determination will become possible as the monitoring continues. Measurements will continue for several more years after the environment around the inscribed rock is stabilized in the new shelter.
World History
