[ad_1]
Shanghai weather during the Spring Festival holidays
The Spring Festival is approaching. Yesterday the weather in Shanghai was good, so will it still be good during the Spring Festival?
Yesterday, the Shanghai Central Meteorological Observatory issued the latest weather forecast for the Spring Festival holiday: More clouds are expected in the first half of the Spring Festival holiday, accompanied by weak rainfall, and the temperature will drop slightly in the second half, mostly cloudy.
It is worth noting that the average temperature during the Spring Festival holiday period was significantly higher than the same period of normal years, and Shanghai is likely to enter spring during this period.
Mostly cloudy to cloudy today
Yesterday the weather in Shanghai was good, mostly cloudy to sunny. In the morning, the temperature continued to drop under the influence of radiation cooling: the temperature hovered around 4 ° C in the city center, between 1 and 5 in the suburbs and 1.8 ℃ below zero in Chongming. With the help of sunlight during the day, the maximum temperature in most areas of Shanghai rose to around 11 ° C.
Today’s temperature will be higher than yesterday, and the city has more clouds, mainly cloudy to cloudy, the temperature is between 7-13 ° C and the wind is not strong, and the southeast wind is 3-4.
According to the Central Meteorological Observatory forecast, Shanghai has more clouds in the first half of the Spring Festival holiday (11-17), accompanied by weak rainfall. Among them, there will be fog in some areas on the morning of 14-15, and cloudy weather will prevail in the second half.
During the Spring Festival, the temperature in Shanghai is obviously warmer. The extreme maximum temperature is expected to rise to 17-18 ° C. The warmest temperature will appear on the fourth day of the Lunar New Year. However, at the end of the holiday, there will be cold air “visiting”, there was a significant drop, and the wind increased.
Furthermore, atmospheric diffusion conditions are generally good. There is no obvious pollution process in Shanghai during the Spring Festival holidays. From the 15th to the 16th, due to the transport of pollutants from upstream, there will be good light pollution from PM2.5. Air quality during the rest of the period is mainly good.
There are two criteria for judging spring.
It can be said that this Spring Festival is full of spring. According to Xin Xin, a weather analyst with the China Weather Channel, the current spring process in Jiangnan has come a long way, which is equivalent to the exciting solar term one month later. According to Xinxin’s analysis, Ningbo’s first sentence of entering spring on January 31 is a month and a half earlier than the usual March 13. However, due to excessive advance (more than 15 days in advance), a second trial will be made. on whether to enter the spring.
According to reports, there are two criteria in meteorology for determining the beginning of spring, abbreviated standard or sliding standard. The simple standard is to look only at the average daily temperature and reach the standard every day for 5 consecutive days (10 ° C or higher), and the first day is spring day.
The sliding scale is much more complicated. It is necessary to take 5 individual days as a group and calculate the average, as a group of 1-5 days, a group of 2-6 days, and a group of 3-7 days. . This is called a 5-day moving average. For 5 consecutive groups with a temperature greater than or equal to 10 ° C, count as spring, and after the first group of 5 days, find the first date greater than or equal to 10 ° C as the spring day.
Xinxin calculated according to the sliding scale, Ningbo’s preliminary ruling entered in the spring on January 31. Because in the south, where the temperature changes frequently during the season, the simple standard often causes embarrassment, like going back to winter after spring, or colder than winter after spring, so we now use the mobile standard. While the sliding scale can filter out some extreme weather conditions, accidents are unavoidable, so for safety reasons, multiple judgments need to be made when checking the average weather value. Therefore, whether Ningbo is really spring depends on the performance of the weather in the back.
It is worth noting that the temperature in Shanghai will continue to rise in the coming days. Based on the simplified calculation, Shencheng is most likely to start the spring sprint again around the 11th. However, since the cold air will be ready to start late in the holidays, there is still suspense in the countdown to spring. If this spring round is successful, it will enter meteorological spring on the same day as last year, ranking second-earliest in history, second only to first place on February 9, 2016.
Author: Xu YanfeiReturn to Sohu to see more
Editor:
Disclaimer: The opinions in this article only represent the author himself. Sohu is an information publishing platform. Sohu only provides information storage services.
[ad_2]