Ice Caves Never Melt Even In The Middle Of Summer In China

In the rocky mountains in Shanxi province exists the largest ice cave in China, thanks to the perfect combination of natural elements.
Ice caves never melt even in the middle of summer in China
Across continental Europe, Central Asia and North America there are many ice caves where winter reigns all year round. Most of this cave is located in cold regions such as Alaska, Iceland and Russia, where the temperature is low for a long time. However, there are also ice caves that may exist in warmer climates. Ningwu Cave is a prime example

. The temperature is always -4 to -6 degrees Celsius.
Over three million years old, Ningwu Cave is structured like a bowling pin, 85 meters deep underground by the side of a mountain. The cave wall and the ground were covered with a thick layer of ice, surrounded by huge pillars of ice and stalactites extending from the top to the floor Ningwu Cave has a very special property: it can freeze during summer even when the outside temperature is high, according to Amusing Planet.




Most of these caves are called "cold traps". They have top vents or air outlets that allow cold air to enter winter caves, but prevent warm summer air. In winter, dense cold air settles inside, pushing layers of warmer air upwards and out of the cave. In summer, the cold air in the cave remains the same as the relatively warm surface air is lighter and cannot be entered.
The ice acts as a buffer to help stabilize the temperature inside the cave. Any incoming warm air is immediately cooled before it can cause a significant heat rise. Sure, the warm airflow still melted some of the ice, but the average temperature was pretty stable
In winter, when extremely cold air is poured in, any liquid water in the cave will freeze, helping to generate heat and prevent the temperature in the cave from dropping too low.




To form such ice, it is necessary to converge a certain amount of water in a suitable time period. In winter, the climate must be cold enough for the mountains to be completely covered in snow.
Whereas in the summer, the temperature should be high enough to make the snow melt, not to the point of fully warming the cave air. Nature has created a perfect balance of all the factors that help this ice cave form and exist.
Although the cave is hundreds of meters deep underground, visitors can visit the first 100 meters thanks to the system of stairs, pedestrian bridges ... Admission tickets cost 120 yuan (more than 420,000 VND).



Photo: ImageChina / Xinhua
According to Truong Dang / Vnexpress
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