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| Variation characteristics of temperature and humidity in North Grottoes under different opening regulation
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| ZHANG Bo1，2，3，4，CUI Huiping2，PEI Qiangqiang2，3，4，GUO Qinglin2，3，4，
WANG Yanwu2，3，4，YANG Shanlong2，3，4 |
| (1. Key Laboratory of Mechanics on Disaster and Environment in Western China，Lanzhou University，Lanzhou，Gansu 730000，China；2. Dunhuang Academy，Dunhuang，Gansu 736200，China；3. National Technological Research Center for Conservation of Ancient Wall Paintings and Earthen Heritage Sites，Dunhuang，Gansu 736200，China；4. Key Laboratory of Conservation and Research for Ancient Murals and Earthen Heritage Sites of Gansu Province，Dunhuang Academy，Dunhuang，Gansu 736200，China) |
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Abstract The change of temperature and humidity in micro-environment is the main factor affecting weathering of sandstone grottoes. In order to find out the influence of different cave shapes and opening regulation on the micro-environment of the grottoes，13 typical caves in the North Grottoes were selected for monitoring the micro-environment for 9 years. The results show that the opening regulation is the main factor affecting the micro-environment of caves. The open caves without cave eaves are the most affected by the external environment，followed by those with cave eaves. The changes of semi-open caves，super-large caves and closed caves decrease in sequence. Humidity in caves mainly come from external environment，and the influence of water seepage from the cliff is less. The absolute humidity and variation of all caves is basically the same as that of the outside. The change of relative humidity is mainly caused by the change of temperature in cave. Once the eaves are shaded and the door is closed，the relative stability of temperature in the cave can be controlled，thereby reducing the change in relative humidity. These changes of micro-environment characteristics can provide scientific basis for preventive management and risk assessment of the North Grottoes.
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LI Wenbo1, 2, GAO Wei1, 2, HAN Shengming1, 2, WEN Hanhong2, DING Hang2, HUANG Baolong2, NING Fangbo2. Multi-parameter collaborative optimization modeling of temperature fields in －50 ℃ cryogenic freezing of Shanghai?s silty clay layer[J]. , 2025, 44(8): 2232-2248. |
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2021, Vol. 40 
