China Weather Network News "The neck is short in spring" is a saying of old Beijingers, which means that the spring in Beijing is as short as a person’s neck. However, this year’s "Spring Neck" in Beijing seems a bit long. How long is it? Probably … … As long as a giraffe’s neck.
It is understood that Beijing entered the spring earlier than in previous years, and entered the door of spring on March 14, which is the second earliest year since 1951. In previous years, after the end of spring, Beijing was like an impatient child who always started to go to summer in a hurry. The residents of Beijing probably didn’t feel the existence of spring except for the flying poplars.
However, this year, under the influence of active cold air, it is always cold and sudden, and the temperature fluctuates, so the average temperature can’t reach the summer standard all the time (in the sense of climate, when the sliding average temperature is greater than or equal to 22℃ for five consecutive days, the first date in the corresponding temperature series of the year is taken as the summer start date. )
The ridicule of the official blog of the Central Meteorological Observatory is not "outstanding". In fact, netizens have frequently asked recently: Will Beijing’s spring be longer?
According to Shao Peng, a weather analyst in China, according to the statistics from 1981 to 2010, the average date of spring in Beijing is March 27th, and the average date of summer is May 23rd, which means that the average number of days in spring is 57, and this year is March 14th. Judging from the current forecast, it may not be until May 18th at the earliest, which means that there will be at least 65 days in spring this year.
The reason for the long spring in Beijing this year is mainly the fluctuation of temperature mentioned above: the high temperature in the early stage led to the early spring in Beijing this year; After the spring, cold air strikes frequently, the temperature rises and falls, and the temperature difference between day and night is also very obvious, which leads to the fact that even if the temperature is high during the day, the average temperature of a day still can’t reach the standard of entering summer.
Take April as an example. Since the beginning of April this year, although the highest daytime temperature in Beijing has reached above 28℃ twice on April 4 and April 17, which even gave many citizens the illusion of "early summer", the temperature in the morning and evening of these two days is still relatively low. In addition, as soon as the temperature is a little high, cold air comes to suppress it. As soon as the cold air comes, the daytime temperature immediately drops to more than 10 degrees, which is like a child named "entering summer".
However, although the "spring neck" in Beijing has always been relatively short, it is not only this year that the spring lasts for more than 65 days in history. For example, in 2002, Beijing entered the spring on March 9, and it did not enter the summer until May 18 of the same year. Spring lasted for 70 days; In 2006, Beijing entered spring on March 15, and summer only on May 28 of the same year. Spring lasted 74 days.
According to the forecast, the temperature in Beijing will rise gradually in the next half month, and the daily maximum temperature will generally be maintained at around 22℃-27℃. I believe that the pace of summer is really getting closer and closer. (Text/Ma Heiyang Data Support/Shao Peng Design/Li Yiyu)