why do the olympics use artificial snow during the winter olympics?
the winter olympics use a large amount of snow and the natural snow is difficult to meet
The FIS document “Design Requirements for Freestyle Skiing and Snowboarding Sites for the 2022 Winter Olympics” points out that the slalom chase track requires 1.07 × 10^5 cubic meters of snow; even a small ski jumping event Road, also need to maintain at least 1.1 × 10^4 cubic meters of snow.
Obviously, abundant snow is the most basic condition to guarantee the Winter Olympics.however in the past when we relied on natural snow there were cases where god didn’t give him a face which prevented the winter olympics from being smoothFor example, in the 1928 Winter Olympics in St. Moritz, Switzerland, due to the lack of snowfall in the host area, many competitions were directly cancelled, and even the 50-kilometer cross-country skiing race was due to lack of snow, making the time for the champion to reach the finish line more than one slower than the previous champion.Hour.
With the development of science and technology, artificial snowmaking has gradually changed the situation of “relying on the sky to admire the face” of the Winter Olympics, solved the embarrassment of no snow and less snow in the host site, and made the competitive competition more safe and reliable.
Snow is being made at the National Alpine Ski Center ski trails on November 16, 2021 (drone photo).photo from xinhua news agency reporter zhang chenlin
since the 1980 lake placid winter olympics have adopted artificial snowmaking measures the winter olympics held in vancouver sochi and pyeongchang have all used artificial snow
artificial snow makes the olympics more fair
With the fairness and standardization of all Olympic events, the requirements for the amount and quality of snow in the stadium are higher.In order to ensure quality, artificial snow gradually played the role of “Mr. Key” in the Winter Olympics.
First of all, the snow properties of artificial snow fields are single and stable.the natural ski resort offers a beautiful environment and soft snow that is not only suitable for skiing and play but also very suitable for sightseeing for the general publicbut the most basic requirement for the olympic games is that the athletes compete under fair and just conditions
therefore to meet the fairness of the event the snow properties of the snow field should be single and stable so that athletes from various parts of the world can enjoy stable and fair track conditions no matter the starting order and the competition time
the snow must be compacted and leveled repeatedly before the race with a snow compactor to slow down the development and deterioration of the snow and to keep the properties of the snow stablecan you see the differences between artificial snow and natural snow from formation to accumulation?》In one article,We have already mentioned that the physical properties of natural snow are changeable, which has an impact on the performance of athletes and the comfort of skiing, while artificial snow has a single snow layer and stable properties.it is easier to be a slope with constant physical properties
secondly there are significant differences in snow density moisture content and the development of snow crystals in snowfields in regions with different climates in the world which affect the fair competition of athletes from different
For example, the Tianshan Mountains and Altay Mountains of Xinjiang in my country have low temperature, low snow density, low moisture content, high porosity, and high temperature gradient, which belong to a typical continental snow climate.Under the snow climate conditions, the snow develops and metamorphoses obviously, and snow particles with relatively large diameters (deep frost, etc.) account for a high proportion in the snow field.
However, in Hokkaido, Japan, the east coast of Canada and other regions with marine snow climate, the temperature is relatively high, the snow density is high, the moisture content is high, the porosity is low, the temperature gradient is low, and the development and metamorphism of large-grained snow crystals such as deep frost is slow.In addition, the Alpine snow cover, which is a transitional snow climate, is unique between continental and marine snow climates.
If athletes who often train in a continental snow climate zone with low snow moisture content and many large snow crystals are placed in a marine snow climate zone with high snow moisture content and many small snow crystals for skiing competitions, it will definitely affect the skiing competition.Athlete performance and fairness in competition.artificial snow is controlled completely by artificial conditions and it is the same everywhereit can overcome the differences in the characteristics of the snowfield brought by the regional climate environment and therefore affect the fairness of sports
snow was required at the winter olympics in the us
snow in the snow field must be resistant to high pressure and high impact force
The slogan of the Olympic Games is “faster, higher, stronger”, ski jumping, snowboard pursuit skiing, etc. are all unfolded in high-speed impact and rapid pursuit.the winter olympics therefore require the snow on the snow track to be resistant to high impact and high pressure
due to the large porosity low density and low strength of natural snow it cannot meet the demand of snow for competitions such as ski jumping and snowboard skiingeven if the snow is compacted with a snow press it cannot meet the ideal ski competition standardThis is because the bottom of natural snow is prone to form condensed deep frost with high porosity but strong compressive ability due to the deterioration of the gradient temperature.he’ll affect the game
the international snow federation requires that the slopes for alpine skiing must maintain a crystalline state similar to that of the ice-bound terrainsuch slopes have high hardness and can ensure that the slope surface is relatively flat under the condition of high-speed impacts and turns by athletesAnd no matter how many times the players appear, the state of the snow track and the shape of the snow can remain stable.an artificial snow field with one type of snow crystal and stable properties can successfully meet the above requirements
It can be seen that in terms of the objective requirements of the Winter Olympics snow field, artificial snow is very suitable for the Winter Olympics in terms of snow volume control, stable snow properties, and strong compressive and impact resistance of the snow field.the requirement of snow cover is the objective requirement to ensure the quality of the snow used in major international events
artificial snow will play an irreplaceable role at the beijing winter olympics 2022 and become one of the guarantees of fairness and justice
let’s look forward to the strong posture and excellent performances of the athletes on the snow field in the winter olympics
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this article is translated from china science expo