What are the geographical knowledge points of the 2022 Beijing Winter Olympics?

1. The colder the Winter Olympics, the better. Winter Olympics events are more affected by meteorological conditions. Wind speed, wind power, temperature and visibility all directly affect the performance of athletes. There are two core meteorological indicators in the competition. One is that the average temperature in February is below 0 degrees Celsius, and the other is that the snowfall in February is above 30 centimeters.

2. Too low temperature is not conducive to the level of athletes, but also easy to cause frostbite. According to the requirements of the International Olympic Committee, the extreme temperature of the Winter Olympics venues should not be lower than MINUS 17 degrees Celsius.

3. Considering the uncertainty of natural weather process, especially snowfall, and the strict requirements of snow sports on the venue, international events, especially the Winter Olympics, generally use funa to lay snow trails. In addition to helping to reduce the unstable factors of "depending on the weather", artificial snow has a high density, which is more resistant to the influence of wind and rain and temperature changes than natural snow, and is more stable and lasting.

There is not much difference between artificial snow and natural snow in essence. They are all made of water or steam. The difference lies in density. Natural snow is 328kg/m3, and artificial snow is 856kg/m3, which is higher. Under the same conditions, the same volume of artificial snow melts slower than natural snow.

5. Fu Na usually refers to artificially simulating the process of natural snowfall under certain meteorological conditions, and spraying tiny water droplets into cold air to realize the transformation of water droplets into snowflakes.

6. There are nine kinds of artificial snow made of snow used in Beijing Winter Olympics. The smaller the size, the closer it is to powdery snow, and the bigger the size, the wetter it is. When the temperature is high during the day, use light snow with less water content. When it reaches MINUS 20 degrees at night, use No.7 snow and No.8 snow, so that the quality of snow is better.

7. The runway of the National Ski Platform Center has a steep slope of 35 degrees. In order to prevent the sprayed snow from slipping, the artificial snow has to be repeatedly crushed by a snow press weighing about six tons, so that the snow can gradually become dense and become gorgeous ice-like snow.

8. Skiing competition is afraid of snow. First of all, snow will affect the track. First, when it snows, the rising temperature will affect the snow temperature and the track quality. Therefore, the types and quantity of waxing for athletes' skis need to be adjusted accordingly. Second, new snow will soften the track surface and increase friction, which is not conducive to athletes' play.

Secondly, low visibility during snowfall will affect the sight of athletes and referees, especially for high-speed skaters. There is no snowfall within 24 hours, which is more suitable for skiing.