What is the concept of 5 thousand meters above sea level?

5 km above sea level is a height value, indicating that the height of a place is 5 km from sea level. From this value, we can know that the position is above sea level.

In geography and meteorology, altitude refers to the vertical distance above the altitude of a place on the ground, that is, the height difference between a place and sea level. On the map, the altitude of a place is also called altitude or absolute height and absolute elevation.

When the altitude reaches 5 kilometers, the air pressure and oxygen content felt by the human body will gradually decrease, resulting in a series of altitude sickness symptoms. Such as headache, insomnia, shortness of breath, dry nose or throat, muscle pain, nausea, chills and other symptoms.

Therefore, for people who live in low-altitude areas for a long time, reaching areas above 5 kilometers above sea level may cause physical discomfort. Therefore, when going to high altitude areas, we should make full preparations and take adaptive measures, such as rising gradually, taking proper rest and supplementing water, so as to alleviate the symptoms of altitude sickness.