The winter half year refers to the period from October in autumn to March in spring in geographical terms.It is the half year with lower air temperature, so it is also called cold half year.At the beginning of November 2012,BeijingMost areas suffered the biggest snow in history in the "winter half year".
Chinese name
Winter half year
Pinyin
dōng bàn nián
Other Expressions
Cold half a year
Time
October to mid March of the next year in the Northern Hemisphere
Half a year is cold.stayNorthern HemisphereGenerally, it refers to the period from October in autumn to March in spring.During this period, the direct sunlight point gradually moves southward from the equator to the Tropic of Capricorn, and then returns to the equator.Accordingly, its sunshine time is short and it receives less solar radiation heat. It is the half year with lower air temperature in the year, so it is also called the cold half year.
The summer half year in the Northern Hemisphere refers to the spring equinox (around March 21) to the autumn equinox (around September 23).The winter half year refers to the autumn equinox (around September 23) to the spring equinox of the next year (around March 21).
Beijing Blizzard
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Event Introduction
Beijing Blizzard
From the daytime of November 3 to 4, 2012, Beijing was hit by the biggest snow storm in the history of "half a year in winter". Traffic in the western and northern mountainous areas was blocked, and 36000 households' electricity consumption was affected.
At 3:00 on the 4th, the Beijing Meteorological Department issued the city's orange blizzard warning, which means the highest level red warning in the west and north.Beijing Meteorological StationThe released precipitation from 8:00 on the 3rd to 18:00 on the 4th shows that the average precipitation in the urban area is 65.6 mm, and the average precipitation in the whole city is 58.5 mm. The maximum precipitation occurs in Fenghuang Ridge of Haidian, reaching 99.6 mm.
Sun Jisong, chief forecaster of the Beijing Meteorological Observatory, said that the "winter half year" is the colder period of the year from November to March. Beijing's meteorological history has never seen such a large amount of precipitation, which has exceeded the historical extreme.
"The rainy and snowy weather is quite complicated this time. The west is dominated by snow, the urban area is dominated by rain and snow, and the east is dominated by rain, so people living in different areas of Beijing feel very different." Sun Jisong said that this is the first snow in Beijing. Although it is the largest, it is not the earliest, ranking fourth in Beijing's meteorological records.
Countermeasures
According to the command center of Beijing Public Security Traffic Management Bureau, the traffic pressure in Yanqing, Changping, Huairou, Miyun and other districts and counties in the north of Beijing is high due to the rain and snow weather. The traffic management department has opened the traffic emergency support headquarters in snowy days at 22:00 on the 3rd, and has opened the on-site headquarters on the Beijing Tibet Expressway in view of the heavy snowfall in Yanqing and Changping.In addition, 7000 traffic policemen in Beijing went on the road to ensure the normal operation of the traffic.
Shi Xuebin, the head of the expressway team of Changping Traffic Detachment, who patrolled the Badaling Bridge section of Beijing Tibet Expressway on foot, told reporters that because the snow was too thick and the vehicles could not drive, the police could only patrol, guide and command on the expressway on foot, and had been working continuously for more than 20 hours.
The blizzard led to varying degrees of congestion in some sections of Beijing Tibet Expressway, Beijing Xinjiang Expressway, and National Highway 110 out of Beijing, with vehicles and people stranded.On the evening of the 3rd and afternoon of the 4th, Changping District distributed food and mineral water;On the night of the 4th, food and drinking water will continue to be provided according to the standard of 4 per capita, and it is estimated that more than 20000 will be needed.
On the evening of the 4th, the Beijing Municipal Public Security and Fire Brigade dispatched 150 members to reinforce the severely affected areas.These team members carried 1000 pieces of food and drinking water, lighting equipment, oil and other materials along the National Highway 110 and the Beijing Xinjiang Expressway, and distributed them to the blocked vehicles along the way.
The reporter learned from the scene that the two lanes of Changping section of National Highway 110 were all full of trucks.Due to the serious congestion, the rescue vehicles of the fire department were unable to move forward, so the firefighters used backpacks and hand-held methods to walk up the mountain to deliver food to the trapped drivers.
It is understood that, after full rescue, by the time of press release, about 1900 people trapped on the Beijing Tibet Expressway had been safely transferred to the Badaling Special Zone Office, but the trapped vehicles could not leave the expressway, and traffic recovery still needed time.
Influenced by factors such as snow on the lines, trees overwhelm the lines, one 220 kV power grid failure occurred in Beijing, 158 10 kV distribution network failures occurred, and 36000 households were affected by power consumption.As of 15:00 on the 4th, 31 failures of 15 routes of 10kV lines have not been restored to normal.
From the night of the 3rd,Beijing Electric Power Company348 emergency repair teams and 4504 emergency repair personnel have been dispatched in succession to carry out power supply recovery work for faulty lines.Due to the snow and ice on the road, the traffic is blocked, and the line is severely iced, so it is difficult to rush to repair the power supply.For areas that cannot be reached by vehicles, the power department has organized personnel to patrol and repair the 10kV fault line on foot.
Newspaper reports Beijing Blizzard
In addition, from 12:00 on the 3rd to 16:00 on the 4th, the 119 Command Center of Beijing Municipal Fire Bureau received 257 alarms and sent out 2646 police.Among these police cases, there were 158 social assistance cases, 70 disaster accidents, mainly including tree sawing, collapse accidents, municipal utilities failures, traffic accidents, etc., and some fire accidents caused by electric wire fires caused by snowfall.
Journalists fromBeijing Municipal Public Security BureauIt is learned that from 21:00 on the 3rd to 18:00 on the 4th, the 110 Command Center of the Beijing Public Security Bureau received more than 300 reports of police cases related to asking for help in snowy days.The Beijing police have strengthened their patrols of the old bungalow areas to prevent gas poisoning, house collapse, fire and other accidents that may cause casualties.
According to the meteorological department, the warning of heavy snow in Beijing has been lifted. As of 20:00 on the 4th, the precipitation process in most areas had ended, but there was still a small amount of weak precipitation in some areas, of which the northern part of Yanqing was still in light snow weather, and it was expected that it would all end in the first half of the night.[1]
Related research
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Temperature Change in Eastern China in Winter Half Year in the Past 2000[2]
