The 3-million-year-old ice cave is only 400 meters away from the volcano. What is the temperature inside the cave?

There is an ice cave on Guanchuan Mountain at an altitude of 2,800 meters in Ningwu County, Xinzhou City, Shanxi Province. The ice cave was formed during the fourth glacial period of the Cenozoic Era and has a history of 3 million years. The temperature inside the cave remains at minus 4 degrees to minus 6 degrees all year round.

What is surprising is that there is an active volcano about 400 meters south of the ice cave. According to historical records, the volcano here has been burning since the Song Dynasty and has a history of more than 1,000 years.

Extended information

Conditions and associated phenomena for the formation of ice caves

1. Conditions for the formation of ice caves

1. There must be two There must be a sufficient height difference between the two outlets and good sealing and insulation between them.

2. There must be a certain water source in the lower part of the cave, and the cold air entering the cave is not enough to completely condense it.

3. The weather below 0℃ lasts long enough.

4. The upper exit is on the shady side of the mountain or in the mountain col.

5. The mountain near the ice cave is relatively steep, but other parts of the mountain are higher and there are no big ravines.

2. Other phenomena associated with ice caves

In winter, the airflow in the cave rises, and the saturated airflow flows out of the cave entrance and condenses when cold air encounters it. In winter when the relative humidity is low, freezing will occur first. Phenomenon.

In summer, the airflow in the cave will flow downward, and a relatively cool microclimate will form at the exit or spring water with lower than normal ground temperature will flow out.

Beiwan New Vision Network—The real "Song of Ice and Fire"! The 3-million-year-old ice cave is only 400 meters away from the volcano, and netizens call it magical

Baidu Encyclopedia—10,000-year-old ice cave