How to deal with the weather change

2022-06-16 0 By

Yanqing, Beijing, Feb. 13 (Xinhua) — Competition areas of the Beijing Winter Olympic Games have experienced a wave of strong winds, cold temperatures and snow since Wednesday.Snow events which are sensitive to weather changes are mainly distributed in Yanqing and Zhangjiakou.How to deal with the cold air?Accurate forecast is the premise of the start of the race, Yanqing, Zhangjiakou two competition areas have built a high-precision weather observation network, forecasters have carried out field forecast training for many years in advance, can provide accurate forecast services for the race.Taking some venues as an example, the National Alpine Ski Center “Xuefeiyan” has built 21 automatic weather stations;The core meteorological observation station network of zhangjiakou Winter Olympics consists of 19 sets of equipment, covering the National Ski jumping center “Xueruyi”, the National Cross-country Ski Center and the National Biathlon Center.These stations can monitor and collect real-time weather information such as temperature and wind speed.”Every hour, computers generate weather forecast products from these data.The forecaster will correct it and provide it to the event organizer.”Shi Shaoying, deputy director of the Beijing Meteorological Observatory and deputy director of the yanqing Meteorological Service group, said that alpine skiing venues can make targeted forecasts for key points of the course distributed at different altitudes.”When factors such as wind speed, snowfall or visibility change to a certain extent, the INTERNATIONAL Snow Federation asks us to give real-time forecasts. This is not an hourly forecast. It means we have to make forecasts on the ground at any time.”Shi Shaoying said.The men’s downhill alpine skiing event was postponed once due to strong gusts on June 6.Shi said the decision was made by the event’s referee committee, which includes OFFICIALS from the International Snow Federation.The influence of this weather change on alpine skiing is mainly due to low visibility and strong gusts caused by snowfall.Because alpine skiing is a short event, athletes are not affected too much by the temperature drop.The adjustment of the schedule is subject to the decision of the referee committee.”We have set aside alternate dates for possible schedule changes.””Said Jenny Wiedek, director of communications for the International Snow Federation.She also praised the Chinese meteorological team: “Their forecasts have been accurate and deserve our trust.”What about the snow?Icy snow of high hardness is the standard for racing snow.According to the REGULATIONS of the International Snow Federation, after the snowfall, the competition venues should clear the natural snow to ensure the quality of the track.Generally speaking, the line leveling work is by leveling the foot of the skis, in a horizontal descent way to clear the natural snow out of the ski.The snowfall from December 12 to 13 increased the workload of the line levelling staff sharply.”We usually go up at five in the morning, so we have to be on call to create the right snow conditions for the race.”Alpine skiing domestic technical officer Hou Jiahuan said.In ski jumping, cross-country skiing and other venues, snow blowing machines need to be used to clean the chute.Guo Ying, director of zhangjiakou Ancient Poplar Venue group, said 21 snow blowers had been prepared for “Xueruyi”, while the National Cross-country Ski Center conducted a snowstorm blowing exercise on Thursday.At present, the two sections of the competition with sufficient snow.Wei Qinghua, the venue manager of the Ancient Poplar Pavilion in Zhangjiakou, said snow making started in early November 2021 and was completed in seven weeks.The mountain operations team does five hours of shaping every night.”The race requires a stable snow that will not be recreated without special circumstances.In case of extreme situations, we have more than 100,000 cubic meters of reserve snow at three venues.”Wei Qinghua said.Logistical support teams are on standby to provide power in low-temperature environments, operate large equipment and provide medical assistance.Zhangjiakou Core Area Winter Olympics power support team carried out special patrol and special care for Aoxue, Yunding and Guyangshu substations, and strengthened inspection of transformers, GIS, ice melting and snow melting equipment and other facilities.Cross-country skiing is called a “snow marathon”.Due to the long competition time, the effect of cooling on the athletes’ competition experience is more obvious.The medical support group will arrange the medical supply points reasonably before each race according to the race type and the length of the track.”Usually there are five spots in each game, where the athletes are most vulnerable to injury.The rescue team at each site consists of four people, including the team leader, a doctor, a nurse and an English volunteer.”Gao Yu, medical officer of the National Cross-country Ski Center, said, “When athletes are injured, have a sudden illness or lose temperature, they are equipped with a thermal insulation blanket, so that they can be treated on the spot as soon as possible.”In addition, the National Cross-country Ski Center has a heated room of 20 degrees Celsius.The wind makes a big difference in ski jumping.According to Wang Jingxian, the facility manager of the Ancient Poplar Pavilion group, the pavilion is located in a valley with a natural drop of more than 130 meters. The mountains on both sides can shield or reduce the wind.The wind speed in the take-off area of the site was reduced to less than 4 meters per second due to the construction of the windproof net in the later period.In “Snow Flying Swallow”, when the automatic weather station encountered extreme weather, its wind sensors may be frozen, resulting in the loss of mechanical wind data;If the solar panel is covered with snow, the device will not be able to draw power properly.An external weather service team of seven people is required to patrol and repair at all times.Gao Meng, deputy leader of the team, said the team had to wear crampons to climb steep slopes every time, and often had to carry dozens of kilograms of batteries and other equipment.”It’s snowing again these days.”We have a clear idea of potential dangers and are confident of providing weather services for the Winter Olympics.”High fierce said.(Writer: Wang Qinou;Participating Journalists: Lu Xianting, Xia Zilin, Yang Fan, Guo Yaru, Xia Liang, Sun Zhe, Wang Haoyu, Li Chunyu, Ni Yuanjin)